Oki BISM2 User's Manual
Contents
1. 5 2 Range See the Data Transfer Rate vs distance graph below The data throughput of the Module is limited to 280Kbps by the parsing of the data being transferred through the RFCOMM stack The graph below shows the typical data throughput Distances are measured in free space between 2 Modules Dats Tranter Rate Distance 5 3 Temperature Performance Data Aate with Temperature Alain s 6 Functional Description The BISM2 Bluetooth module is self contained Bluetooth product and requires only power to implement full Bluetooth communication The integrated high performance antenna together with the RF and Base band circuitry provides the Bluetooth wireless link and the UART interface provides a connection to the host system The variety of interfaces and the AT command set allow the BISM2 module to be used for a wide number of short range wireless applications rom simple cable replacement to complex multipoint applications where multiple radio links are active at the same time The complexity and flexibility of configuration are made simple for the design engineer by the integration of a extremely comprehensive set of AT commands supplemented with a range of S registers which are used for non volatile storage of system parameters These are fully documented in the Bluzi AT Command Reference2. Baudrate 9600 38400 115200 460 800 Tle Mode 5512 160 is xo Sov 200 210 230 Wait for Connection Or Discoverable Mode 59 00 59 00 5900 sooo edd sov 65 00 6500 S508 5510 640 S509 5511 320 Wait for Connection Or Discoverable Mode 27s 29 330 DUET Sov 326 336 ass S508 5510 1000 S509 S511 11 Inquiring Mode AT BTI sooo 50 00 sooo sooo sov seo 54 00 seo seoo Connecting Mode ATD xx 50 00 sooo sooo sooo sov 54 00 5400 seo 54 00 Connected Mode No Data Transfer sso 720 Sov 72 72 740 Connected Mode Max Data Transfer sev 2150 2250 3250 sov 2450 2600 2800 36 00 Notes These figures were obtained with pre production firmware Production values will typically be 20 lower Calculated figures 5 DC Characteristics 5 1 RF Performance 5 1 1 Transmit Power Conducted Transmit Power min LOmW 0dBm max amw 5d8m Antenna Gain typ Effective Transmit Power min 0dBm Max vedem Gutput power can be reduced by program contral 5 1 2 Receive Sensitivity Receive Sensitivity B6dBm at 25 C Antenna Gain T2461 tye Effective Receive Sensitivity 8848m at 25 C 5 1 3 RF Performance Data Receive 5 5
3. AT BTR lt bdadde_m gt 9 5 Modem Control and Status Signals serial port has DTR DSR RTS CTS DCD and RI control lines RTS and CTS are locally controlled to prevent local buffer overfiow The status of DTR DRS DCD and RI can be exchanged with the remote peer device If for example the DTR DSR lines are to be exchanged between the two peers to simulate the performance of a physical cable then it is possible to do so Refer to the description for S Registers 551 552 and 553 for more details Some serial implementations link CTS and RTS to remove the need for handshaking Ezurio do not recommend linking CTS and RTS other than for testing and prototyping If these pins are linked and the host sends data at the point that the Bluetooth Serial Module deasserts its RTS signal then there is a significant risk that internal receive buffers will overflow which could lead to an internal processor crash This will lead to a drop in connection and may require power cycle to reset the module Ezurio recommend that the correct CTS RTS handshaking protocol be adhered to for proper operation 9 6 Oscillator Output The output from the high performance crystal oscillator 109pm can be divided and output on one of the selected PIO lines removing the need for a crystal on the customer s main peb The frequencies available are 16 He 24mh For more implementation details please contact Ezurio s F
4. 20 BISM2 Bluetooth Version 2 0 Serial Module 1 General Description Ezurio s BISM2 Bluetooth Serial Module is a fully integrated and qualified Class 1 Bluetooth solution designed for lowest cost of integration and ownership for designers wishing to incorporate Bluetooth functionality into their products The module is qualified to Bluetooth Version 2 0 The BISH2 Bluetooth Serial Module is one of the most compact complete Bluetooth solutions making it ideal to integrate into handheld devices However a version of the BISM2 module is avallable that retains the same board size mounting holes and connector as the previous Bluetooth Module from Ezurio allowing users to access the improved radio performance and functionality without the need for any pcb modifications The BISH2 Module is based on Cambridge Silicon Radio s BlueCore 04 chipset The module contain sall of the hardware and firmware for a complete Bluetooth solution requiring no further components The Module has an integrated high performance antenna which is matched with the Bluetooth RF and baseband circuitry The firmware integrated into the BCO4 chipset implements the higher layer Bluetooth protocol stack up to and including the Generic Access Profile GAP Service Discovery Profile SDAP Serial Port Profile SPP Dial Up Networking Profile DUN Headset Profile HSP Hands Free Profile HFP File Transfer Profile FTP and Audio Gateway virtual process
5. AT BTR lt bdadde_m gt Where lt bdaddr_m gt is optional If it is not specified then the slave unit will accept connections from any device If specified then only connections from the device specified will be accepted When the units are next power cycled the slave unit will wait for the master to connect to it and the master will continually look forthe slave If connection attempt fails the master will wait for 2 Seconds before reattempting a connection This 2 second delay can be varied by issuing it an ATSS30 command with an appropriate value in the range 100ms to 15000ms IMPORTANT NOTE The DSR input to the module MUST be asserted for the auto connection to succeed When operating at TTL levels a OV is seen as an assert state When operating at RS232 levels and voltage greater than is seen as assert It is usual to connect the DTR line of the host to the DSR line ofthis device 9 4 Audio Cable voice With a pair of these modules it is possible to replace a mono audio cable with two way traffic That is setup where a microphone is connected to a speaker at the remote end and vice versa So this mode effectively replaces two audio cables Assuming the Bluetooth address of the master to be lt bdaddr_m gt and that of the slave to be lt bdaddr_s gt the master module is configured by sending it the following AT commands AT BTR lt bdaddr_s gt And the slave is configured by Atar Arssi ATSO 1
6. Configure two modules to automatically connect and transfer data audio or a combination of data and audio when both devices are powered The peer device does not have to be another Intelligent Serial Module It is possible to implement auto connect with a Bluetooth enabled mobile phone Automatically re connect devices when a connection is dropped Remotely access the AT parser of the remote unit from a master device to perform Over The Air OTA configuration lt Configure the module to enter a state on power up and after a period of time change to another state automatically This allows units to be placed in the discoverable state for a limited time period Read and write to GPIO lines Read the ADC channels 2 Get fast GPIO and ADC status through an inquiry response patent pending 7342 Audio Set up audio connections Enable disable Auto Answer for incoming connections 7 3 1 3 UART Change the baud rate from 1200 to 921 600 baud Use the DSR line to drop connections Flexible configuration as either DTE or DCE Change escape sequence character Change the number of Stop bits and Parity Enable or disable echoes 7 3 1 4 Security Enable Authentication by requiring a PIN code for incoming AND OR outgoing connections Enable data to be encrypted over the air for incoming AND OR outgoing connections The module can be configured to be non connectable and non discoverable non connecta
7. rH EN E 24 Max H 4 Las 08 2281020 e 7 13 Max REF O i a 11101 ji zc n4 rq 5 2910 05 REET REE D Location of Connector All dimensions i Bottom View 1 E asd 20 4 T 2 510 05 14 2 BISM2 Module without antenna special order The dimensions for this module are identical to the standard BISM2 illustrated above but the antenna is replaced with a U FL connector TOP VIEW The external antenna used must not result in increased output power Le the total gain of mating connecter cable and antenna must not exceed 248 Ifa higher gain antenna is connected it will invalidate the RF and Bluetooth approvals for the module The external antenna must provide a 50 Ohm impedance The antenna connector is U FL connector supplied by Hirose Mating connectors with cables are available from Hirose and their distributors and also from other cable suppliers The data sheet for the connector series is available at http www hirose co ip eataloge hp e32119372 0df 14 21 External Antennae A variety of manufacturers can supply external antennae suitable for use with the BISM2 module Without antenna Users should be aware that the choice of antenna may affect the qualification af the module To ensure that the qualification is not affected the TOTAL GAIN of the ext
8. moat commonly a reverse SMA These are available from a variety of Sources a good range is supplied by jefatech com categorv cable assemblies uf High volume quantities can be obtained from Hirose When connecting to SMA antennae please check whether your antenna is a normal or reverse thread 143 BISM1 Compatible Module special order The BISM1 Compatible format version of the BISM2 Bluetooth Serial Module preserves all of the mechanical mounting detail and dimensions of the earlier module design This is a special order module for customers who are currently in production with the BISM1 but want to migrate to the additional features of the BISM2 It is not recommended for new designs VIEW 02 63 005 25 6 24 02 SIDE VIEW naka i All dimensions in mm 14 4 Labelling 4 3 Max The label contains the Part number and the unique Bluetooth address of the module 14 5 Ordering Information The BISM2 is available with different variants of engineering or production firmware Ordering Information is provided below Part Number Description Firmware Version TRBLUZS 00200 BISMZ with Integrated ceramic antenna and standard AT firmware Version 7 18 0 The following parts are available to special order Please contact your Ezurio representative Part Number Descripti
9. 0 20 Shared with GPIO3 UART_RE Toro 0 P Vamax 02v Direction may be programmed Vymax 0 8v Toro OP Vamax 020 Direction may be programmed YP Vymax 0 8v 3 2 3 SPI Bus Signal Name Pinno 1 0 Signat level Comments SPLMOSI 0 1 Used to reprogram Flash MIO 5 Vosmax 0 20 7 T Vamaxzo SV 9 1 Vamaxc v 3 3 2 4 PCM Interface Signal Name Pinno 1 0 Signat level Comments PCM 20 lero Vamax 02v Tf unused keep pins open YP Vumax 0 8v 3 1 Vumaxco 8V Vamax 3 7V Tero Vamax 020 PCM OUT 26 o 3 3 2 5 General Purpose 1 0 and ADC Signal Name Pinno 1 0 Signat level Comments GIO 1 9 2442 Tero Vamax 020 1446 33 35 37 39 moo ao us 1 3 3 2 6 Miscellaneous Function Signal Name Pin No 170 Signal level Comments Reserved USB D 32 1 Normally inactive Vain 0 7vdd_usb Pall to GND through 10K Reserved USB D T 0 3vad usb Normally inactive 0 7vdd_usb Pall to GND through 10K Reset RESET 1 po Threshold 260 Active HIGH Terminology USB Signal Levels vdd usb refers to the internal voltage generated by the LDO regulator on the module which is typically 3 3V H
10. aircraft Should carry appropriate warnings 12 3 Qualifications 12 3 1 RF approvals The Module is listed as a Bluetooth Product in terms of the Bluetooth SIG Program Reference Document PRD This means that it can be integrated into end products without further testing or approval listing The manufacturer must state the Ezurio part number and product reference in his literature in order to meet the requirements of the Bluetooth and regulatory approvals A list of the countries where the Module is approved will be provided by Ezurio as required As a minimum the product is listed in Europe Scandinavia and USA Ezurio assumes no liability for customer failure to comply with national RF approvals 12 3 11 EMC Emissions EN 300 328 v1 5 1 2004 08 12 3 2 EMC Immunity EN 301 489 1 V1 4 1 2002 08 12313 FCC FCC Part 15 247 2004 Subpart C FCC ID P4018 12 4 124 1 Safety and Regulatory Statements Europe EU Declaration of Conformity EZURiO DECLARATION OF CONFORMITY 1n accordance with Annex IV of the EU directive 1999 5 EC Ezurio decre under our responsiblity that the BISM2 Module complies with the appropriate essential requirements of the Article 3 of the RATTE and the ater relevant provisions when used for s Intended purpose Health and Safety requirements contained In Article 3 1 a EN 60 950 1992 Safety of information technology equlpment Amendment A1 1993 Amendment A2 1993 Amen
11. module mour Tnput Output from module E UART_DSR to Module GPIO3 UART_DTR General Purpose 1 0 or DTR functionality mour General Purpose 1 0 LED mour General Purpose 1 0 mour General Purpose 1 0 mour General Purpose 1 0 mour General Purpose 1 0 Notes 1 PIO4 DSR is used by the blu2i module to sense that the host is connected and is intricately linked with connections For outgoing calls if this line is not asserted then an error is indicated Similarly for AT BTP and While in a call for appropriate modes a de assertion means fall into command state Ifthe de assertion exists for longer than the period specified in S Register 519 then the connection is dropped as if an ATH command was received 2 PIO2 RI is normally de asserted When an incoming connection is detected it will be asserted until the connection is either answered or rejected using ATA and ATH respectively See S Registers 552 amp 553 for more details 3 DCD will be de asserted when the device is in the unconnected state Asserted when Connection is active See S Registers 552 and 553 for more details 4 PIOS is either used as GPIO or driven as UART When the unit is configured in pure host mode this pin is forced into UART_DTR and is asserted when there is a Bluetooth connection GPIO Pins 1 to 8 are available f
12. provide a 3 3v regulated output Pins 33 35 amp 37 are now GPIO instead of N C The default state is configured as an inputs Pin 39 is now allocated as GPIO9 which defaults as an input line instead of a 108 monitor This change has been made to increase the 1 O capability and to prevent noise being injected onto the 1V8 rall The module is physically smaller so the fixing holes no longer align with those of the previous module A brown out circuits now incorporated on the module Reset functionality remains the same The Oscillator output is now available 17 Disclaimers EZURIO S BLUETOOTH PRODUCTS ARE NOT AUTHORISED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE MANAGING DIRECTOR OF EZURIO LTD The definitions used herein are Life support devices or systems are devices which 1 are intended for surgical implant into the body or 2 support or sustain life and whose failure to perform when properly used in accordance with the instructions for use provided in the labelling can reasonably be expected ta result in significant injury to the user b A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system or to affect its Safety or effectiveness Ezurio does not assume responsibility fer use of any of the circuitry desc
13. reason the sniff parameters are specified in the BISM2 module via four S registers S Register 561 is used to specify N S Register 562 is used to specify and S Registers 563 564 are Used to specify minimum and maximum W respectively Although the specification defines these parameters in terms of timeslots the S register values have to be specified in units of milliseconds the firmware does the necessary translation to timeslots ig pn magn J L 9 Application Examples 9 1 RS232 Modem Signals Just as a telephony modem has control and status lines the blu2i Module also provides for 6 control and status lines as per the table below The direction column is as seen from the module s viewpoint Direction Function also known as RI Ring Indicate _ DCD Data Carrier Detect N DSR Data Set ready our DTR Data Terminal Ready N CTS Clear to Send our RTS Request to Send configurable with S register 552 The first four lines are under program control These use four of the GPIO pins and are mapped to 1 0 as per the table below The last two are under control of the UART driver and their functionality is always enabled Direction Connector Pin Label Function mour cor General Purpose 1 0 mour General Purpose 1 0 mour UART RI Tnput Output from
14. the equipment 12 42 1 FCC Labelling requirement If the FCC ID is not visible when the module is installed inside another device then the outside of the device into which the module is installed must also display a label referring to the enclosed module This exterior label can use wording such as the following Contains Transmitter Module FCC ID 14018 or Contains FCC ID PI4018 Any similar wording that expresses the same meaning may be used 13 Environmental 13 1 Operating temperatures Parameter Mim Max unit Operating temp standard product 40 25 ec 13 2 Storage temperature Parameter Mim Max Storage temp ao ems ec 13 3 Reliability Parameter Test Comment Thermal Shock 200 cydes 40071850C 30 min 1 Vibration Continuous operation at 60 Hz 159 max sine wave 12 hours Simm stroke Shock 506 Half Sine Wave S axis x cycles each ais Moisture Resistance High Temp Storage 850C 360 hours Low Temp Storage 409C 240 hours High Temp Humiaity 60 C 9034RH 360 hours Operation Thermal shock 4015 60 C in 30min 300 cydes with continuous operation Elecro Static Discharge ENSSO24 1999 IECGI000 4 3 Drop Test 75cm to concrete 3 axis x 2 Eydes per corner 14 Physical Dimensions 14 1 Mechanical Dimensions 14 11 Standard Module 43
15. wide range of wireless applications To enable these different applications the Bluetooth SIG Special Interest Group has defined a series of different profiles that define the way in which Bluetooth devices communicate with each other and perform basic functions These provide a base line of interoperability for specific application Scenarios upon which more complex user applications can be developed There are over 30 different profiles many of which have been developed for specific applications The BISH2 firmware is provided with support for the profiles that are most commonly required for cable replacement applications The current profiles support includes GAP Generic Access Profile The base connection profile upon which others are based SDP Service Discovery Profile The profile to find other Bluetooth devices and the services they support SPP SerialPort Profile Emulation of a serial cable for cable replacement applications DUN Dial Up Networking Profile support for connection to an external PSTN GSM GPRS oF VPN connection Audio Gateway The base element for Headset and Handsfree profile A portion of these profiles must be implemented within the host system HSP Headset Profile Supports early implementations of headsets Now largely replaced by the HEP Hands free profile which provide more control over the headset operation e FTP File Transfer Profile full client support For other profile supp
16. AE team 10 Application Information 10 1 Antenna Position The antenna used on the BISM2 Bluetooth module is designed to be largely immune from the effects of proximity detuning Normally antennas operating at 2 4GHz are affected by their surroundings so that great care Is needed in their placement and orientation The BISH2 can be used in most locations and orientations and is only marginally affected by the presence of a significant ground plane in close proximity The antenna distribution is close to isotropic which means that the orientation of mounting has only a limited effect on the overall range However the optimum range is achieved when the two antennae are directly facing each other Example of Radiation Characteristics Horizontal Polarisation Vertical Polarisation 2400 GHe moe 2485 GHz 270 180 E 90 90 180 The module should not be located in a sealed metal enclosure as this will act as a Faraday cage and severely attenuate the radio signal The antenna finish may tarnish as a result of environmental effects and handling This is a cosmetic effect and does not affect the RF performance 10 2 Power Supply Considerations The power supply for the Module has to be a single voltage source of Vcc within the range of 3 6 V to 7 0 V It must be able to provide sufficient current in a transmit burst This can rise to 65mA The Module includes regulators
17. Manual provide the widest scope for integration a range of different physical host interfaces are provided 6 1 Interfaces 6 1 1 UART interface TK UART UART_RTS and UART_CTS form a conventional asynchronous serial data port with Randshaking The interface is designed to operate correctly when connected to other UART devices such as the 16550A The signalling levels are nominal OV and 3 3V and are inverted with respect to the signalling on an RS232 cable The interface is programmable over a variety of bit rates no even or odd parity stop bit and hardware flow control The default condition on power up is pre assigned in the external Flash Two way hardware flow control is implemented by UART RTS and UART CTS UART RTS is an output and is active low UART CTS is an input and is active low These signals operate according to normal industry convention writing different values to the relevant S register the UART RI can be continuously polled to detect incoming communication The UART RI signal serves to indicate incoming calls UART DSR is an active low input It should be connected to DTR output of the host When the module is running in high speed mode See definition for S Reg 507 this pin should be asserted by the host to ensure connection is maintained A de assertion is taken to mean that the connection should be dropped or an online command mode is being requested The module communicates with the
18. ameter Specification 40 pin Board to Board connector Number of Contacts 40 Quantity delivered 2000 Connectors per Tape amp Reel Voltage sov Current Rating 0 5A max per contact Resistance 0 05 Ohm per contact Dielectric withstanding Voltage 500V RMS min Operating Temperature 45 C 125 C Contact Material phosphor bronze surface gold plated Insulator Material beige natural Stacking height 3 0 mm 3 5 mm 4 0 mm 5 0 mm Insertion force 2188 Withdrawal force 1st 10N Withdrawal force 50th 10N Maximum connection cycles 5o 12 1 Bluetooth Qual The following safety precautions must be observed during all phases of the operation usage service or repair of any application incorporating this Module Manufacturers of the RF equipment are advised to convey the following safety information to users and operating personnel and to incorporate these Guidelines into all manuals supplied with the product Failure to comply with these precautions Violates safety standards of design manufacture and intended use of the product Ezurio assumes no liability for customer failure to comply with these precautions 12 2 Safety Informatio Switch off the Bluetooth device before boarding an aircraft Make sure it cannot be switched on inadvertently The operation of wireless appliances in an aircraft is forbidden by many airlines to prevent interference with communications systems Applications that could result in use on
19. be accessed using S Registers 621 to 628 GPIO4 is connected to an LED on the module If these 1 0 pins are set for input then the LED will be driven by the host and appropriate drive current requirements must be satisfied Logic 1 switches on the LED GPIO3 is also used for DTR output active low See S Register 552 amp 553 Analogue 0 and 1 should not exceed 1 8v and S Registers 701 and 702 are used to access them 3 3 Electrical Specifications 3 3 1 Absolute Maximum ratings Absolute maximum ratings for supply voltage and voltages on digital and analogue pins of the Module listed below exceeding these values will cause permanent damage Parameter Min Max Unit Peak current of power supply 0 100 Voltage at digital pins 37 v Voltage at POWER pin 36 7 v 3 3 2 Recommended Operating Parameters 3 3 2 1 Power Supply Signal Name Pin No 1 0 Voltage level Comments Vee 29 1 6 tye 30ma GND 11 15 18 6 Ground terminals to be attached 30 36 in parallel 27 53v typical For monitoring only No current RS 232 Interface Signal Name Pinno ro Signal level Comments o Vamax 0 2V Vouin 2 8V UART_RX 25 1 varias 1 Vumx 0 8 Vominszav UART_RTS E 1 UART o Voumax
20. ble but discoverable connectable but non discoverable connectable and discoverable Automatically store Paired devices in a trusted device database in the flash memory 73 4 5 Iuetooth Set the module to be a master or slave Make Bluetooth connection to a specified device Perform a full inquiry for other Bluetooth devices Query a remote device to check if a service is offered Fetch the friendly name of a remote device Increase or decrease the delay before the master abandons a connection attempt Change the device class code Set the device s friendly name Change the Inquiry scan time Change number of returned devices from an inquiry scan Obtain the RSSI value for a connection 7 3 1 6 Management Decrease or increase the output power to suit your connection range Configure the modules to work in Sniff and other law power modes 7 4 Multipoint Firmware For multipoint operation the same hardware can be loaded with multipoint software Whereas the firmware for single point AT communication only allows one connection to be active at any one time Using multipoint firmware allows a number of simultaneous connections to be made and maintained 1t also allows connections to multiple profiles to one or more devices Multipoint firmware should be seen as a concept of channels instead of slave connections When operating in Bluetooth multipoint mode the resources and ban
21. customer application using the following signals Rs 232 Port TXD 6 application sends data to the module s UART_RX signal line Port RXD application receives data from the module s UART TX signal line ws el es 18 wra rine Figure 6 1 UART interfaces Note that the serial module output is at 3 3V CMOS logic levels Level conversion must be added to interface with an RS 232 level compliant interface 6 1 2 SPI bus The Module is a slave device that uses terminals SPI MOSI SPI_MISO SPI and SPI CSB This interface is used for program firmware updates at the factory Ezurio supply a PC based utility to allow firmware upgrade over the UART port It is highly recommended that customers should use this method for updating firmware Note The designer should be aware that no security protection is built into the hardware or firmware associated with this port so the terminals should not be permanently connected in a PC application 613 GPIO Port Eight lines of programmable bi directional input outputs 1 0 are provided that can be accessed either via the UART port or Over The Air OTA from a second Bluetooth unit These can be used as data inputs or to control external equipment By using these in OTA mode a BISM module can be Used for control and data acquisition without the need for any additional hast processor Each of the GPIO 1 8 ports can be independently co
22. dment A3 1395 Amendment A4 1997 Amendment AL1 1997 EN 50371 Generic standard ta demonstrate the compliance of low power and electrical apparatus with the banc restcbons related to human exposure to electromagnetic fields 10 MHz 300 GHz General publ Protection requirements with respect to electromagnetic compatbilty EN 301 489 1 V1 4 1 2002 08 Electromagnetic Compatibilty and radio spectrum Matters ERM Electro Magnetic Compacbalty EMC Standard for radio equipment and services Part 17 Specific onions for wideband esta equipment Means of the efficient use of the radio frequency spectrum EN 300 328 V1 5 1 2004 08 Radio Equipment and Systems RES Wideband transmission systems Technical characterises and test Conditions for data transmission equipment operating in the 24 GHZ ISM band and using spread spectrum modulation techniques Part 2 Harmonized EN covering essential requirements under article 3 2 f the RATTE directive 12 4 2 FCC and Industry Canada Statements This device complies with part 15 of the FCC Rules Operation is subject to the following two conditions 1 This device may not cause harmful interference and 2 this device must accept any Interference received including interference that may cause undesired operation Changes or modifications not expressly approved by the party responsible for compliance could void the user s authority to operate
23. dwidth of a Bluetooth master device are shared amongst the different connected devices This has an impact on the maximum throughput to any one device if multiple device connections are maintained it also impacts on the memory resources and device database within the Bluetooth stack Designers should be aware of these restrictions when using multipoint configurations In most cases better latency and power consumption can be achieved by polling fast data transfer rather than by maintaining concurrent Connections 1n general multipoint connections are viable for up to three connections but other connection schemes become appropriate if a greater number of devices are being deployed 7 5 OTA Over the Air Configuration When the 2 has its remote AT parser enabled its settings can be remotely controlled by a master unit see register 5536 This places the slave unit s AT parser in remote mode providing over the air configuration This mode is of use for remote sensor applications where no host Processor is required to control the slave Bluetooth unit 7 6 Boot modes The module has the capability of booting into 1 of 7 modes Currently only Boot Mode 1 is supported Boot Mode 1 is default and gives functionality equivalent to the BISM module These modes will specify diferent PSKEY settings to allow for different basic operation Please contact Ezurio for further information 8 Low Power Modes The current drain from
24. e as 1 0 Default configuration is as an input PIO lines can be configured through software to be either inputs or outputs with weak or strong pull ups or pull downs At reset all PIO lines are configured as inputs with weak pull downs UART_RX UART_TX UART CTS UART RTS UART_RI UART_DCD and UART DSR are all 3 3v level logic For example when RX and TX are idle they will be sting at 3 3V Conversely for handshaking pins CTS RTS RI DCD DSR Ov is treated as an assertion Pin 6 UART RI is active low It is normally 3 3v When a remote device initiates a connection this pin goes low This means that when this pin is converted to RS232 voltage levels it will have the Correct voltage level for assertion Pin 8 UART_DCD is active low It is normally 3 3v When a connection is live this pin is low This means that when this pin is converted to RS232 voltage levels it wil have the correct voltage level for assertion Pin 10 UART DSR is an input with active low logic It should be connected to the DTR output of the host When the BISH2 Module is in high speed mode See definition for S Register 507 this pin should be asserted by the host to ensure that the connection is maintained A deassertion is taken to mean that the connection should be dropped or an online command mode is being requested Pin 27 VCC_3V3 monitor may only be used for monitoring purposes It must not be used as current source The GPIO pins can
25. e provides ranges of over 250 metres at transmit powers of Support is provided for law power modes that make the BISM2 particularly applicable to battery Powered installations The BISH2 module is Lead free and is RoHS compliant and supports an industrial temperature range of 40 C to 85 C 1 1 Applications POS Equipment Voice Applications Medical Equipment Industrial Automation Telematics Automotive Applications 2 Features Feature Bluetooth Transmission Fully Bluetooth pre qualified Range Frequency Max Transmit Power Min Transmit Power Receive Sensitivity Data Transfer rate Serial Interface Serial parameters Physical size Current consumption Low power sniff mode Temperature Range Supply Voltage Brown out Interface Levels Audio Profiles Multipoint Field upgradeable Protocols Indicators Lead free Implementation Classi Bluetooth 2 0 250 metres typical free space 2 400 2485 GHz 6dBm 2748m Better than 8648 Up to 300Kbps RS 232 bi directional for commands and data using AT commands Default 9600 n 8 1 Configurable from 1 200bps to 961 200 bps Support for DTR DSR DCD RI RTS CTS 22 8 x 33 8 x 7 6 mm 89 24 0 x 69 0 x 7 6mm 99 BISM1 Form Factor Typically 22mA during data transfer in standard power mode Lower powers are attainable with a configurable low power mode 2 5mA typ Normal operation 40 C to 85 C 36
26. ed to adjust the average current drain when in discoverable and or connectable modes Registers 508 and 509 specify the interval and window for page scans and registers 510 and 511 specify the interval and window for inquiry scans Register pairs 508 509 and 510 511 describe duty cycles when the blu2i module goes into scan modes It is while scanning that the highest current draw occurs The average current draw is determined by simple arithmetic using the values stored in the 508 509 and 510 511 register pairs Typical current consumption is given in Section 4 1 The current drain while waiting for a connection or discoverable mode is about 30 times higher than in idle mode This is when the page inguiry scan duty is 100 These modes give the quickest response to a page or inquiry request from a remote peer It is possible to reduce the duty cycle down to as low as 0 5 at the expense of response time The response time can be specified via 5 Registers 508 and 510 for page and inquiry respectively where the worst case response time can be as high as 2 5 seconds Then the duty cycle can be varied by changing the value of 5 Registers 509 and 511 appropriately For example if S Register 508 and 510 are both set to 1000ms and S Register 509 and 511 are both set to 11ms then the duty cycle is reduced to 1 this means that average current drain at 5 0v will 2 of 65mA plus the normal idle mode current that is it is as low as 2 75mA Howev
27. ence 0 3vdd_usb and 0 7vdd_usb correspond to 1 0V to 2 3V If Vec falis below the recommended minimum of 3 6V these values will be reduced 4 I O Characteristics 4 1 Power Consumption The current drain from the Vee power input line is dependent on various factors The three most significant factors are the voltage level at Vec UART Baudrate and the operating mode The hardware specification for the Module allows for a voltage range of 3 6 to 7 0 at Vec Tests have shown that there is no significant difference in current draw when Vcc is 5 or 6V Therefore the data presented below pertains to Vcc levels of 3 6 and 5v only Tests have shown that where power drain is an Issue it is best to keep Vec at the lower end of the range The UART baudrate has a bearing on power drain because as is normal for digital electronics the power requirements increase linearly with increasing clocking frequencies Hence higher baudrates Fesult in a higher current drain Finally with regards to operating mode the significant modes are idle waiting for a connection inquiring initiating a connection snif and connected With connected mode i is also relevant to differentiate between no data being transferred and when data is being transferred at the maximum Fate possible The AT command Set document describes how to configure tne Module for optimal ower performance 4 1 1 Typical Current Consumption in mA
28. er in this case it can take up to 1 second to establish a connection The connected state current consumption while a master or slave can be considerably reduced by enabling Sniff mode described in detail in the next section mA Current per LED when fitted 320 530 8 1 Low Power Modes using Sniff Bluetooth connections master slave in nature A master sends packets and a slave has to acknowledge that packet in the next timeslot Timeslots in Bluetooth are 625 microseconds wide This implies that a master will always know when packets will be sent and received which further means it is able to optimise power usage by switching on power hungry circuitry only when needed slave on the other hand does NOT have prior knowledge of when a packet will be received and has to assume that a packet wil be received from a master an every receive slot This means that it has to leave its receiving circuitry on for most of the receive slot duration The result of this is high power Consumption as illustrated in the power table in Section 4 1 where a slave with no data transmission Still consumes around 31mA whereas master consumes only 6m This problem was identified very early in the evolution of Bluetooth especially since headsets spend all their time as a slave in a Bluetooth connection and it was solved by having a mode called Sniff ith appropriate lower layer negotiating protocol Sn
29. ernal antenna including insertion loss of the connectors and cable must be less than 2dBi Ifa higher gain is employed then the pre qualified status of the module wil be last Itis the customer s responsibility to ensure that an external antenna does not negate the qualification Centurion w centurion com manufacture a snap in external connector of the form generally known as a rubber duck with a 100mm captive lead terminated in U FL connector that is particularly appropriate for use with the BISM2 module The part number is WCR 2400 IP NovaETS uwns novaets com in the UK supply a rubber duck antenna with L FL connection The ordering information Is W 154C 248 Wireless LAN Antenna 2 4GHz Assembled with U FL IPX Connector Reel Rienheimer Elektronic www reel ombh de manufacture a wide range of antennae including their planTEc roof antennae that are ideal for vehicle mounting Part Number M7OCXR 0300 00 XX XX Contact Reel for availability of a U FL connection and exact part number Pacific Wireless www pacwireiess com supply wide range of antennae including high gain antennae although these will require requalification they may be appropriate for longer range applications The RaaTenna is a good solution for 1P65 applications V FL to SMA adaptors pigtails Other antennas can be used with a pigtail that goes from the U FL connection an the BISM2 to the appropriate antenna connection
30. he 5 registers 701 and 702 Suitable external scaling and over voltage protection should be incorporated in your design The module provides 5 samples per second at the UART with a baud rate of 115200 or above Low latency access of the upper 6 bits of the ADCs can be obtained by using Ezurio s 1 0 via an enhanced inquiry process 6 1 6 LED single LED provides information on the status of the module It is controlled by a S register to display the status of various parameters and is useful for debug and test 7 Integrated Firmware 7 1 General The BISM2 has been designed to provide the fastest route to market for designers who wish to use Bluetooth to wirelessly enable their products To achieve this Ezurio has implemented a wide ranging set of AT commands that control all of the standard Bluetooth tasks These remove the complexity of Bluetooth from the design engineer and allow the wireless link to be controlled by means of a simple set of commands For applications where multiple concurrent live connections need to be maintained a variant of firmware is available which is specifically targeted at multipoint operation For both applications a comprehensive range of windows based software is avallable to speed up the design process low cost development kit is also available that can be used for prototyping both cable replacement and multipoint applications 7 2 Profiles Bluetooth has been designed to accommodate a very
31. iff mode during connection is basically an agreement between the slave and its master that data packets will only be exchanged for N timeslots every M slots The slave can then assume that it will never be contacted during slots and so can switch its power hungry circuitry off The specification goes further also specifying a third parameter called timeout which specifies extra timeslots that the slave will agree to listen for after receiving a valid data packet Put another way if a data packet is received by the slave then it knows that it MUST carry on listening for at least T more slots If within that T slot time period another data packet is received then the timer is restarted This mechanism ensures low power consumption when there is no data transfer at the expense of latency When there is a lot of data to be transferred it acts as if sniff mode were not enabled It is stated above that during sniff mode a slave listens for N slots every slots The Bluetooth specification states that a master can have up to 7 slaves attached to it with all slaves having requested varying sniff parameters It may therefore be impossible to guarantee that each slave gets the M parameter it requested In light of this the protocol for enabling sniff mode specifies that a requesting peer specify the M parameter as a minimum and maximum value This wil allow the master to interleave the sniff modes for all slaves attached For this
32. lect alteration improper installation testing or unauthorized repair performed by anyone other than a Ezurio designated repair facility Any non warranty repairs or maintenance shall be at Ezurio s standard rates in effect at the time This warranty is in lieu of all other warranties whether expressed implied or statutory including but not limited to implied warranties or merchantability and fitness for a particular purpose In no event shall Ezurio be liable whether in contract in part or on any other basis for any damage sustained by its customers or any other person arising from or related to loss of use allure or interruption in the operation of any products or delay in maintenance or for incidental consequential in direct or special damages or liabilities or for loss of revenue loss of business or other financial loss arising ut of or in connection with the sale lease maintenance use performance failure or interruption of these products
33. mm stacked height Hirose if they are to take advantage of this 0 0 Board Spacing Part number source Matching HRS PCB socket Jemm wwamsasras ense mex ussronss ess aimm emaoosissi CIS37 0057 506 Simm _Now2005 183 5 1 1537 0157 0 86 See http www hirose co jp eataloge hp e53700036 pdf for detail information on the PCB socket 11 Board to Board Connector This chapter provides specifications for the 40 pin board to board connector which serves as physical Interface to the host application The receptacle assembled on the Module is Hirose type DFI2C Details are available at http wuw hirose co jp cataloge_hp e53700036 11 1 Stacking Height Mating headers fram Hirase are available in different stacking heights allowing the spacing between the BISM2 and carrier peb to be changed fram 3 5mm to 5 0mm Item Part number Stacking height number Receptacle on DF12C 4005 0 5V 86 35mm smm cL537 0007 7 86 Module Headers DF12 series DF12 3 5 40DP 0 5V 86 3 5 mm C1537 0032 4 86 DFIN4 0 40D9 0 5W 86 01537 0057 2 86 DFINS 0 40D9 0 5W 86 5 0 mm 01537 0157 0 86 Notes The headers listed above are with Boss and metal Ang Suffix B6 denotes RoHS compliance H Stacking Height mm BISM with Receptacle Y 3 1 Mating Board with Header 11 2 Hirose Connector general specification Par
34. nfigured to be either an Input or Output selection of ports can be accessed synchronously GPIO 1 and 2 can be configured as event counters The ports are powered from Vec The mode of these lines can be configured and the lines are accessed via S Registers 621 to 628 Low latency 1 0 can be accessed by using Ezurio s via an enhanced Inquiry process 6 1 4 PCM CODEC Interface PCM OUT PCM_IN PCM CLK and PCM SYNC carry up to three bi directional channels of voice data each at Sksamples s The format of the PCM samples can be A law j law 13 bit linear oF 16 bit linear The PCM CLK and PCM SYNC terminals can be configured as inputs or outputs depending on whether the module is the Master or Slave of the interface Please contact an Ezurio FAE for further details The Module is compatible with the Motorola SSI TM interface and interfaces directly to PCM audio devices including the following 6 1 4 1 Compatible Codec Chips Winbond W61360 13 bit linear CODEC Motorola MC145483 compatible MSM7702 single channel A law and CODEC OKI MSM7705 four channel A law and law CODEC The default codec support is for the Winbond W61360 Codec development boards that mate with the EZURIO Wireless Developers Kit are available for each of the three codecs listed above 6 1 5 ADC The BISM2 provides access to two ADCs These provide an input range of OMV to 1 800mV which can be read using t
35. on Firmware Version TRBLU23 002MP BISWZ with integrated ceramic antenna and Version 5 13 ES standard Multipoint firmware TRBLU23 002HC BIS 2 with Integrated ceramic antenna and Version 00056 01 standard HCI firmware TABLU23 00300 BISMZ with U FL jack and standard AT firmware Version 2 11 0 TRBLU23 009MP BISMZ with U FL Jack and standard Multipoint Version 5 13 65 firmware TRBLUZS 00SHC BISM2 with U FL Jack and standard HCI Version 00056 01 firmware 15 Related Documents blu2i AT Command Set Version 2 11 0 Reference Manual Firmware Release Notes Version 2 11 0 bluzi Multipoint Firmware Reference Manual BISM Bluetooth Serial Module Quick Start Guide BISM Bluetooth Serial Module FAQ Blu2i Application Scenarios Wireless Developer s Kit User Guide ACC 00S Winbond W61360 Audio Codec Board Manual ACC 008 OKI 7702 Audio Codec Board Manual Bluetooth Core 2 0 Specification waw bluetooth ora 16 Differences from previous modules The BISM2 has been designed to be a drop in replacement for previous BISM modules from TDK Systems and Ezurio However some additional features have been made This section lists all of these changes More details can be found in the relevant section of the data sheet Significant additions have been made to the AT command set Pin 27 is now marked RESERVED instead of VCC_3V3 It can no longer be relied to
36. or general purpose use 9 2 Modem signalling over Bluetooth The protocol used in Bluetooth for implementing the serial port profile allows for the exchange of four modem signals This information is contained in a special transparent message Which contains bits identified as RTR RTC DV and IC which depending on the type of serial device being emulated maps to DTR or DSR RTS DCD and RI respectively In addition this message also includes the ability to convey a BREAK input from one end to the other To allow for the greatest flexibility and variability in how the modem control signals are used out in the real world S Registers 551 552 and 553 have been provided which allow for any of RTR ATC DV and IC to be mapped to any modem control status line BREAK signal on RX line If the host sends a break signal of duration greater than 100ms then the blu2i module is configured to treat that as a signal to perform a hardware reset This being the case it is not possible to convey a BREAK over Bluetooth to the peer device Reset The module can be reset by the host without the need of any 1 0 using a BREAK signal The module has been configured to reset when the RX line detects a break condition for durations Greater than 100 milliseconds The Reset lie has a fixed pull down resistor of 10KOhm 9 3 Pure Cable Replacement Mode The module has the capability of being preset into a pure S wire data cable replacement mode The 5 wire
37. or is used Within the BCD4 to implement an AT command processor This interfaces to the host system over a straight forward serial port using an extensive range of AT commands The AT command set abstracts the Bluetooth protocol from the host application saving many months of programming and Integration time It provides extremely short Integration times for data oriented cable replacement and voice applications low cost development system is available for fast product evaluation and evelopment An alternative version of firmware is available that provides programming support for multi point applications The Module can be configured so that it can be attached to a dumb terminal or attached to a PC or PDA for cable replacement applications 1n addition to the Bluetooth functionality The BISM2 Module provides access to 9 General 1 0 lines and 2 analogue input and output ines These can be configured to provide connection to simple devices such as switches or LEDs without requiring any external processing Both the GPIO and ADC lines can be accessed either via the wired host UART connection or remotely over the Bluetooth link The BISH2 module is supplied in a small form factor peb 22 0mm x 34 0mm x 7 6mm that connects to a main peb using a 40 way Hirose connector The interface is compatible with the BISM1 module The module includes a high sensitivity high gain antenna which provides excellent range Typical open field performanc
38. ort please contact Ezurio Ltd at bluZiGezurio com 7 3 AT Overview The AT command set is well known by engineers and was developed to aid the integration of PSTN modems It provides simple high level commands for complex functions that can easily be Incorporated into programs or used within programming scripts Ezurio has used this familiar concept and extended it to Bluetooth to simplify the integration of Bluetooth for product designers Rather than having to understand the many stages of setting up a Bluetooth connection or function a single AT command is all that is required For example to connect to a Bluetooth device with an address 00809844EA13 all that is needed is to send the string to the UART of the BISM2 module The module will attempt to make a connection and return connect 00809844ea13 1101 or NO CARRIER depending on whether the connection was successful The scope of the AT command set developed by Ezuri is such that most Bluetooth functionality can be covered greatly reducing development time provide additional functionality a range of S registers has been implemented These allow program settings to be stored to control the BISM2 function and also give access to configuring and reading ports and status registers within the BISM2 Full details of the AT command set are provided in the Blu2i AT Command Reference Manual 7 3 1 AT features at a glance 7344 General
39. ribed no circuit patent licenses are implied and Ezurio reserves the right at any time to change without notice said circuitry and specifications 17 1 Data Sheet Status Ezurio Ltd reserve the right to change the specification without notice in order to improve the design and supply the best possible product Please check with Ezurio Ltd for the most recent data before initiating or completing a design Where reference is made to related products from other suppliers Ezurio takes no responsibilty for the information availabilty or performance of such products 17 2 Warranty Ezurio warrants that its products shall conform to Ezurio s published specifications and remain free from defects in materials and workmanship under normal proper and intended use for a period of two 2 years from date of purchase provided that proof of purchase be furnished with any returned equipment 1f during the warranty period any component part of the equipment becomes defective by reason of materiai or workmanship and Ezurio is immediately notified of such defect Ezurio shall at its option supply a replacement part or request return of equipment freight prepaid to its designated facility for repair In the event no trouble is found on products returned for repair Ezurio reserves the right to charge the customer its standard published repair charge This warranty shall not apply to any products that have been subject to misuse bending twisting neg
40. s being RX CTS RTS and GND This mode requires no changes to a host application since the Bluetooth connection is automatically set up on power up If the connection is lost the BISM2 module will constantly retry until the connection is reinstated By implication two devices are needed to replace a cable One device is pre configured to always be a master and the other a slave Assuming the Bluetooth address of the master to be lt bdaddr_m gt and that of the slave to be bdad r s the master module is configured by sending it the following AT commands Arssi ATSSQA ATS507 2 AT BTR lt bdadde_s gt 000 The ATS507 2 setting puts the device in DSR drop mode only This means that when the device needs to be reconfigured deasserting the DSR line will ensure that the module responds quickly to commands This further means that in stand alone mode the DSR input line MUST be asserted e g OV in TTL signal mode The slave is configured by ATSS12 ATSO AT BTR lt bdaddr_m gt Where lt bdaddr_m gt is optional 1f it is not specified then the slave unit will accept connections from any device If specified then only connections from the device specified will be accepted If it is desired that the slave unit should not be discoverable the master is by default not discoverable then the configuration commands are ATS512 3 ATSO
41. teners can 8 or M2 screws plus suitable washers circuit board spacers or customized screws clamps or brackets in 2 2mm diameter holes Note that care should be taken to ensure the head of the fixing does not interfere with the circuit Nylon fixings are recommended In addition the board to board connection can also be utilized to achieve better support The antenna Brown square component on top side of PCB must not be influenced by any other PCBs components or by the housing of the host device The proximity of the antenna to large metallic objects can affect the range and performance of the system Designers should carefully Consider the location of the Module and the type of enclosure material that is used To prevent mechanical damage be careful not to force bend or twist the Module Be sure it is positioned fat against the host device 10 5 1 Fixing Pillars Ezurio in conjunction with Richco has designed a mounting pillar for use with the Bluetooth Serial Module This allows the module to be securely held to a primary pcb using snap fit details A variety of different heights are available to accommodate different variants of Hirose stacked connectors Pillars supporting a 3 5mm stacked board height can be supplied by Ezurio These and alternative spacings can also be ordered directly from Richco Customer designs using these pillars should use 2 5mm diameter holes on a 1 6mm thick PCB in Conjunction with the 3 6
42. the Vee power input line is dependent on various factors The three most significant factors are the voltage level at Vcc UART baud rate and the operating mode The hardware specification for the blu2i module allows for voltage range of 3 6 to 7 0v at Vec Tests have shown that there is no significant difference in current draw when Vec is 5 or 6V The UART baud rate has a bearing on power drain because as is normal for digital electronics the power requirements increase linearly with increasing clocking frequencies Hence higher baud rates result in a higher current drain Finally with regards to operating mode the significant modes are idle waiting for a connection inquiring initiating a connection and connected With connected mode itis also relevant to differentiate between no data being transferred and when data is being transferred at the maximum rate possible The operating mode can best be described by stating the AT commands required to enter that mode In addition there are certain S Registers which have a direct impact on power consumption which are described next The blu2i Module has a single LED which can be configured to display connection status Tests have shown that this LED can consume up to 5 3mA which is more than double the current draw when in Idle mode S Register 534 can be used to completely disable this indicator 5 Registers 508 to 511 which specify the page and inquiry scan intervals and windows can be us
43. to provide local 3 3V This rail is accessible on connector 32 for monitoring purposes only Under no circumstances should this pin be used to source current Power Vee can be provided via the board to board connector Pin 29 on 22 10 3 Power On Reset Power Cycling and Brown Out considerations The Module is provided with an active high reset pin Hirose 40way DF12C connector pin 13 Upon the application of power the Power On Reset circuit built into the Module will ensure that the unit starts correctly There is no need for an external power reset monitor Note The previous version of the Bluetooth Serial Module required an external Brown Out circuit to ensure correct operation This circuitry has now been incorporated into the module The power Supply has been designed to work with previous versions of customer circuitry that may or may not have external brown out implementations Customers migrating from a BISM to BISM2 module may be able to simplify their power supply circuitry as a result 10 4 RF Shield meet FCC requirements all modules are supplied with a soldered RF shield This meets the requirement that users may not be able to access RF circuitry without special tools Removal of the shield may negate RF approvals 10 5 Mounting the Module onto the application platform There are many ways to properly install the Module in the host device An efficent approach is to mount the PCB to a frame plate rack or chassis Fas
44. v 70V Integrated brown out detection 33V Logic Audio can be transferred over SCO channels through the PCM interface at 64kbps PCM can be configured as master or slave FTP Server SPP DUN FTP Audio Gateway Headset Handsfree Max 7 slaves Over UART Single point firmware is controlled and configured using AT Commands Standard multipoint firmware uses a simple packet based protocol and requires a host to enable the module to function effectively Single point only allows a point to point connection whereas multipoint allows more than one simultaneous connection 9 x digital 2 x analogue 8 bit resolution 1x programmable LED small form factor board only Lead free and RoHS compliant wezurio com 3 Functional Block Diagram Pun 3 1 Connection Diagram The Module is equipped with a 40 pin 0 5mm pitch board to board connector that connects to the application platform 2005 eee Eros 3 2 Pin Descrip The Hirose DFI2C board to board connector on the module is a 40 pin double row receptacte The table below defines the pin functions Note that this pin out is as viewed from the underside of the Module Pin signat Description Pin Signal Description No No 1 Analogue o 1 8
45. v max 2 10 for Hast 3 analogue 1 1 8v a 00 for Host s miso ser bus serial O P 5 UART RI Ring Input or Output 7 seese _ sPrbuschip select yp Input oF Output dock 1 P 10 UART DSR Input 1 ew 12_ GPIO3 UART_DTR 1 0 tor Host 13 RESET Reset Up 14 for Host amp LED 15 ewo 16 emos XO for Host 17 serial yP 18 cuo 19 uart crs Clear to sena y 20 Pome PCM Clock 21 UART TX Transmit Data O P 22 sew qw PCH Data 1 P 23 UART_ATS Request to Send O P 24 sew suc PCM Sync VP 25 UART Receive Data 1P 26 scm our PCM Data O P 27 vccava 33v Monitor 28 29 wcsv xev lt vin lt zov 3 wc 32 USB RESERVED Do not connect Pros wo for Host 958 RESERVED Do not connect ss cmor for Host for Host 1 0 for Host Notes The reset circuitry within the BISM Serial Modules now incorporates a brown out detector within the module Customers migrating from previous modules should check their implementation as they may be able to simplify their external power supply design The reset line has a fixed 10kOhm pull down resistor to ground Pins 33 35 and 37 were N C on BISM1 Pin 39 was a 1V8 monitor Designers migrating between designs should be aware that these are now availabl
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