UMS2 User`s Manual
Contents
1. 6 TECHNICAL SPECIFICATION 6 1 ABSOLUTE RATINGS Storage temperature Tstr min 65 C max 150 C Operational temperature Tpwr min 0 max 70 C Power supply voltage VCCmax Imin 0 5 V max 6 00 V Input voltage inputs Vini min 0 5 V max VCC 0 5 V Input voltage I O Vinz min 0 5 V max VCC 0 5 V Output current outputs 161 max 24 mA Output current I O Io2 max 24 mA Power WpwR max 500 mW 6 2 TYPICAL RATINGS VCC Operating supply voltage VCC min 4 4 V max 5 25 V Operating supply current ICC max 50 mA Suspended supply current ICC max 250 Input voltage log 1 min 2 0 V Input voltage log 0 max 1 0 V Output voltage log 1 Vou min 2 8 V Ri 15 kOhm Output voltage 09 0 VoL max 0 3 V Ri 1 5 kOhm Output current log 1 Tou 4 mA VoH VCC 0 5 V Input current log O 16 8 mA VoL 0 5 V 7 CONTACT Address ASIX 5 0 Staropramenna 4 150 00 Prague Czech Republic Tel 420 257 312 378 Fax 420 257 329 116 E Mail info pic tools com support pic tools com sales pic tools com WWW www pic tools com MANUMS2 Copyright 1991 2003 ASIX s r o All trademarks used in this document are properties of their respective owners This information is provided in the hope that it will be useful but without any warranty We disclaim any liability for the accuracy of this information We are not responsible2. 160 10 1051 765 5 RESET 4 2 TOP VIEW O ON O Q WD 4 3 BOTTOM VIEW 28 27 26 25 24 23 22 21 20 19 18 17 16 15 GND USBM mom S 2 USBP RL 83 RI UMS2 PWRE DCD PWRCT DSR TL DTR U2 3 3 CTS 5154 RTS EDT RXD G ESK TXD Ul _ ECS g 6 GND GND RSO 1 VIO RST WWW ASIX CZ 7 00 eo N 4 4 PIN DESCRIPTION Pin Label FTDI Typ Description 1 GND GND PWR Signal ground 2 VCC VCC PWR Power supply 4 4 V to 5 25 V 3 RL RXLED JO C Receive LED 4 RI RI IN Ring indicator 5 DCD DCD IN Data carrier detect 6 DSR DSR IN Data set ready 7 DTR DTR OUT Data terminal ready 8 CTS CTS IN Clear to send 9 RTS RTS OUT Request to send 10 RXD RXD IN Received data 11 TXD TXD OUT Transmitted data 12 GND GND PWR Signal ground 13 RSO RSTOUT JOUT High impedance for about 2 ms after power up and during RESET is active otherwise connected to output of internal 3 3 V voltage regulator This signal is not affected by USB Bus Reset 14 RST RESET IN External reset May be left unconnected if not used 15 VCC VCC PWR Power supply 4 4 V to 5 25 V 16 VIO VCCIO PWR Power supply 3 0V to 5 25 V for output drivers of pins 10 12 14 16 18 25 17
3. GND GND PWR Signal ground 18 JECS EECS I O JEEPROM enable internal pull up of 200 kOhm during reset 19 ESK EESK OUT JEEPROM clock high impedance during reset 20 EDT EEDATA I O JEEPROM data I O high impedance during reset 21 SLEEP OUT Sleep mode indicatotor 109 0 22 3V3 3V30UT 3 3 V output from internal voltage regulator this pin can source up to 5 mA 23 TXLED O C Transmit LED 24 PWRCT PWRCTL IN Power supply selection bus powered 109 0 or external supply 109 1 25 PWRE PWREN JOUT PWREN switched to log O after the module is configured and held in log 1 during reset and sleep mode USB suspend This signal may be used to drive P channel MOSFET which allows to connect applications consuming more than 100 mA from USB 26 TXDE TXDEN OUT Transmit enable for RS485 27 USBDP 55 I O USB data signal plus It is necessarv to connect resistor of 1 5 kOhm between USBDP and 3V3OUT or RSTOUT 28 USBDM USBDM I O USB data signal minus 5 DRIVER INSTALLATION For Windows operating svstems there are two tvpes of drivers e Virtual COM port which can be accessed as common COM port using Win32 API e Direct driver to gain full control of the chip a DLL to interface the driver is provided Detailed description of driver installation procedure can be found on FTDI website http www ftdichip com
4. UMS2 USB to UART interface module User s manual AMX CONTENTS Pe UMS2 USAGE FEATURES TECHNICAL REFERENCE 4 1 SCHEMATICS 4 2 TOP VIEW 4 3 BOTTOM VIEW 4 4 PIN DESCRIPTION DRIVER INSTALLATION TECHNICAL SPECIFICATION 6 1 ABSOLUTE RATINGS 6 2 TYPICAL RATINGS CONTACT O owo A O GU A 1 UMS2 UMS2 is a module based on FT8U232BM integrated circuit manufactured by FTDI Ltd which provides with easy to use USB connectivity to PC without any need of additional knowledge about USB itself 2 USAGE UMS2 is a USB to UART interface with full hardware flow control capability It is capable of data transfer rates up to 1 MBd RS232 and up to 3 MBd RS485 In addition there is an EEPROM memory which may be used to store VID and PID identifiers for OEM applications The module connects by 2 signals directly to USB connector the application side provides with UART signals including hardware flow control From mechanical standpoint the module is arranged as DIP28 with standard pin spacing of 0 1 inch 2 54 mm so it is possible to fit it into either standard or precise DIP28 socket or to solder it directly to printed circuit board The USB connector is to be connected externally which allows the designer to choose the placement of the connector and its type 5 or mini B or USB cable soldered directly to the board may be used This design sigificantly simplifies the development in small p
5. for the contents of web pages referenced by this document
6. roduction series There is a separate power supply for IO pins VCCIO which allows the module to be connected to 3 0 V application easily PWREN signal is designated to drive a P channel MOSFET for applications which consume more than 100 mA max 500 mA from USB In such case it is advisable to turn on enable pull down option in EEPROM configuration Module UMS2 can also operate in BitBang mode in which the data pins act as 8 bit parallel input output This mode can be used for example to configure field programmable logic array directly from PC over USB Further there is RSTOUT signal which stays in high impedance state for about 2 ms after power up and then it is connected to internal 3 3 V voltage regulator Signal RSTOUT is also in high inpedance state whenever signal RESET is active RESET log 0 but it is not affected by reset from USB USB Bus RESET The module is equipped with 93LC56 memory of 128x16 bits Lower half of this memory is used for module s needs 64x16 bits Using EEDATA EESK and EECS the application may use upper 64x16 bits for its own purposes While the application is accessing module s EEPROM memory the RESET signal must be active RESET log 0 Software drivers fow Windows 98 ME 2K XP Mac OS8 OS9 OS X and Linux are available for free on FTDI website http www ftdichip com 3 FEATURES Data inputs outputs 3 0 to 5 V CMOS compatible Powered from USB or external supply Data tran
7. sfer rates up to 1 MBd RS232 and up to 3 MBd RS485 Full hardware data flow control available 384 byte receive buffer 128 byte transmit buffer Support for RS485 level converter Integrated frequency multiplier 6 MHz 48 MHz Supports USB 1 1 protocol USB 2 0 compatible Support for OEM applications VID and PID can be stored in EEPROM memory which is part of the module BitBang mode e PWREN signal for driving P channel MOSFET for applications consuming more than 100 mA from USB max 500 mA e Data flow optimization see web page application note 4 e Ability to use use free EEPROM capacity 64x16 bits e Drivers for Windows 98 2K ME XP Mac OS8 OS9 OS X and Linux available for free e DIP28 socket compatible PCB mountable 4 TECHNICAL REFERENCE 4 1 SCHEMATICS USBDPE R2 USBDME GND Woe F xL ED FI DED DSR DTF TS RTS TXD SND FST 5111 WCC Ra EESK 4 400 EEDATA ca JEC 100 Ri RZ PESET 5 RST OUT 5 RS L I L I VSOUT 2 470 27 iks USEDP 7 USEDM F GND SLEEF To 27 RELED ii TXLED i Weel 12 FHRETL 14 PHREN is TXDEN ie FT 0271 ui 06 Ji 7 1 USBDME XTIN USEDPC 1 1 TXDEN G EMHZ c2 F PHREN 27P 78 FHR TL GND F TXLED 7 84242 5 EEDATA SUPPLY EESE EES ZYZOUT WOCIO END f 1 so ET teg Wee 160 160
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