Texas Instruments TPS2149 User's Manual
Contents
1. Wd9ELZAISNL VIIS su er 24 SIIS 9u An OTIS vH Su ee 9515 t 00 SEH 00 00 EEH 00 ZEH O0 LEH 50 OEH asns ee id OL 8v ve bdo TN an9a Is n 9 ro so v u 3 3 5 dsns t It 7 2 la an9a pasi sory 008 ol Fe 9owoz rey 3822 19 422 eid 3dzz 20 vi oa ST BER ox 4 T 4 pu o le E for vnd 1 aha on Sig ee L oa an ro E 7 41101610 2 L Jiro Nero L tamist asns NE 5 stro Nero WOUd33 an9a L LNX Wero ee ISO ZHN 21 dd eo ANDA ASL 5 22. LED Description Jumpers and Test Points QWERTY Keyboard Matrix EVM Bill of Materials Contents vii viii Chapter 1 Introduction This user s guide describes the setup and operation ofthe USB keyboard hub evaluation module EVM Information and instruction presented throughout this document assumes user familiarity with universal serial bus USB protocol and the use of common lab testing eguipment Topic Page 11 Required Hardware and Software 1 2 Reguired Hardware and Software 1 1 Required Hardware and Software The USB keyboard hub EVM is designed for use with a personal computer running a USB enabled operating system The PC with BIOS chipsets and operating system should be USB 1 1 specification compliant If the BIOS is not compliant the system may not boot when USB devices are connected at power up and the EVM may not function in DOS mode Additionally one or more USB devices are needed to plug into the downstream ports ofthe USB keyboard hub EVM to exercise the hub ports A standard USB cable is needed to connect the USB keyboard hub EVM to a downstream port of the PC or a USB hub tier Figure 1 1 USB Keyboard Hub EVM Hardware USB EVM O od O D Chapter 2 Hardware Overview The
3. 36 general purpose I O lines These lines can be used to implement the keyboard function Jumpers test points and LEDs have been added for testing troubleshooting and debugging purposes Most of the test points are located near the TPS2149 There are also test points on the differential pair lines of the upstream B type connector and the two downstream A type connectors The 2 port can be probed directly on the EEPROM Six LEDs are provided for guick feedback during firmware debugging or as status information One LED D1 is fixed to provide power and suspend status of the TUSB2136 device 2 1 2 2 Chapter 3 EVM Operation Operation of the USB keyboard hub EVM is summarized in paragraphs 3 1 through 3 6 Topic Page 314412 92149 Sete PESA ee 3 2 3 2 Interfaces and USB Ports a eee oie ae 3 2 3 32 Power Supplies ase alt 3 2 3 4 Light Emitting Diodes LEDs 3 2 3 5 Jumpers and Test Points 3 3 3 04 UEEPROMI S ta an Ke Eee aatetta ate As a 3 3 3 1 TPS2149 Setup 3 1 TPS2149 Setup The USB keyboard hub EVM is designed to allow evaluation ofthe TPS2149 device Test points and 0 2 resistors are provided to simplify the evaluation process see Section 3 5 The EVM comes in a default configuration that requires no additional components other than the required hardware and software identified i
4. CONN USB B Digi Key AU Y1007 upstream Type B Crystal 12 MHz 20 pF 50 Diode LED green 2 1 D2 D7 D LTST C170FKT LTST C170FKT 14 2 mcd 20 Ma 0805 Diode LED red 2 1 V m Header 2 pin 100 mil spac J1 J2 HEADER 1X2 Digi Key S1012 36 ND ing 36 pin strip J3 J4 HEADER 2X7 SSW 107 02 T D RA 2 PT RTANG pin Resistor chip 15 4 1 Table 4 1 EVM Bill of Materials Cea i ja m re an SE EN R22 R26 em m 1 sr NC Digi Key P80075 ND Switch 1P1T 20 mA 15 V 7 13 14 BLACK 1 240 333 Test pint black 1 mm 4 2 Chapter 5 EVM Layout 5 1 TPS2149 Silk Screen HEH R9 EB R170 E A SLVP195 TPS2149 Key Board EVM 5 1 Figure 5 2 Schematic are ASL OMS 94 8E ANDA
5. USB Keyboard Hub EVM Featuring the TPS2149 3 3 V LDO and Dual Switch User s Guide September 2001 Mixed Signal Products SLVU050 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries reserve the right to make corrections modifications enhancements improvements and other changes to its products and services at any time and to discontinue any product or service without notice Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete All products are sold subject to Tl sterms and conditions of sale supplied at the time of order acknowledgment TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with Tl s standard warranty Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty Except where mandated by government requirements testing of all parameters of each product is not necessarily performed assumes no liability for applications assistance or customer product design Customers are responsible for their products and applications using TI components To minimize the risks associated with customer products and applications customers should provide adeguate design and operating safeguards does not warrant or represent that any license either express or implied is granted under any TI patent righ
6. USB keyboard hub EVM is 4 inches L x 3 5 inches W and features the TPS2149 made by Texas Instruments The TPS2149 is a power management device that integrates and two power switches into one small package Jumpers 0 2 resistors and jumper blocks provided on the EVM are installed with the factory settings The settings are described in Table 3 2 Review all setting changes prior to powering the EVM Improper settings could result in damage to some of the EVM components The factory settings allow the EVM to operate using 12 MHz crystal along with an 22 EEPROM EVM has also been configured to work only in bus powered mode The firmware installed at the factory and stored in the EEPROM will allow the EVM to function as a two port keyboard hub Users are responsible for developing their own application firmware for the target hardware device The EVM also uses a TUSB2136 USB keyboard hub controller made by Texas Instruments to communicate with the host and the downstream devices A USB cable is needed to connect the root hub of the PC to the EVM type B connector J5 The downstream devices connect to the EVM via the J6 and J7 connectors These downstream devices are powered through the TPS2149 The USB specifications reguire that downstream ports remain off until enumeration is complete Together the TUSB2136 and the TPS2149 ensure the hub meets this reguirement Two other connectors J3 and J4 allow easy connection to the TUSB21
7. age to the EVM If there are questions concerning the input range please contact a TI field representative prior to connecting the input power Applying loads outside ofthe specified output range may resultin unintended operation and or possible permanent damage to the EVM Please consult the EVM User s Guide prior to connecting any load to the EVM output If there is uncertainty as to the load specification please contact a TI field representative During normal operation some circuit components have case temperatures greater than 60 C The EVMis designed to operate properly with certain components above 60 C as long asthe input and output ranges are maintained These components include but are not limited to linear regulators switching transistors pass transistors and current sense resistors These types of devices can be identified using the EVM schematic located in the EVM User s Guide When placing measurement probes near these devices during operation please be aware that these devices may be very warm to the touch Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265 Copyright 2001 Texas Instruments Incorporated Preface Read This First How to Use This Manual This document contains the following chapters Chapter 1 Introduction Chapter 2 Hardware Overview Chapter 3 EVM Operation Chapter 4 Bill of Materials D D D O Chapter 5 EVM Layout Related Do
8. code document provided with the TUSB2136 The header may be generated automatically with the 12C header generation utility software also provided with the TUSB2136 For convenience the EEPROM has been installed on a socket If desired the socket may be removed and the EEPROM can be soldered directly onto the board Using J3 and J4 the firmware installed at the factory will support a QWERTY keyboard with the matrix shown in Table 3 3 Table 3 3 QWERTY Keyboard Matrix BEA EN EA COL 1 COL 2 COL3 COL 4 COL5 COL6 COL 7 COL8 COL9 COL 10 ESA EEE EVM Operation 3 3 3 4 Chapter 4 Bill of Materials Table 4 1 EVM Bill of Materials Footprint ue Par Number Description PKG 8P DGK8 TPS2149 3 3 V LDO and dual switch PKG 5P SOT23 TPS77018DBVR LDO 1 8 V output IC 2 PORT USB HUB with FB1 FB2 5 Capacitor ceramic 0 1 uF 5 10 C11 C14 C0805 KEMET C0805C104K5RAC7800 q iN 50 V X7R 10 C17 C20 Capacitor ceramic 1 0 uF 7 4 7 10 0605 Murate GRM39COG220J050AD_ C2Pacitor ceramic 22 50 V 5 Capacitor ceramic EE C1 C2 C0605 GRM39C0G330J050AD 33 pF 16 V 20 Capacitor tantalum b C15 C16 7343D NEMCO LSR100 16DK125 100 uF 16 V 20 Capacitor tantalum CAP TANTALUM B 293D475X0010B2T 4 7 uF 10 V 20 J6 J7 CONN USB A Digi Key AU Y1005 Connector USB down stream Type A Connector USB CNN NM
9. ctrostatic discharge EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT SPECIAL INCIDENTAL OR CONSEGUENTIAL DAMAGES Tl currently deals with a variety of customers for products and therefore our arrangement with the user is not exclusive TI assumes no liability for applications assistance customer product design software performance or infringement of patents or services described herein Please read the EVM User s Guide and specifically the EVM Warnings and Restrictions notice in the EVM User s Guide prior to handling the product This notice contains important safety information about temperatures and voltages For further safety concerns please contact the TI application engineer Persons handling the product must have electronics training and observe good laboratory practice standards No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine process or combination in which such TI products or services might be or are used Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265 Copyright 2001 Texas Instruments Incorporated EVM WARNINGS AND RESTRICTIONS It is important to operate this EVM within the specified input and output ranges described in the EVM User s Guide Exceeding the specified input range may cause unexpected operation and or irreversible dam
10. cumentation From Texas Instruments FCC Warning TPS2149 3 3 VLDO and Dual Switch data sheet literature number SLVS401 TUSB2136 USB Keyboard Hub Controller data sheet literature number SLLS442 This equipment is intended for use in a laboratory test environment only It gen erates uses and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to subpart J of part 15 of FCC rules which are designed to provide reasonable protection against radio frequency interference Operation of this equipment in other en vironments may cause interference with radio communications in which case the user at his own expense will be required to take whatever measures may be required to correct this interference vi an AASA Introduction viciado ia 1 1 Required Hardware and Software Hardware Overview EVM Operation 311 TPS2149 Selup samma ea 3 2 Interfaces and USB Ports 3 3 Power 3 4 Light Emitting Diodes LEDs 3 5 Jumpers and Test Points 3 6 EEPROM 22 ia tii Bill of Materials EVM Layout 14 4 kea Vestaa a ea IER USB Keyboard Hub EVM Hardware TPS2149 Silk Screen Schematic
11. escription LED D2 D7 D1 3 2 Description Green LED ON indicates corresponding GPIO pin is low when D1 is ON Green LED OFF indicates corresponding GPIO pin is high when D1 is ON Red LED ON indicates that the EVM is powered on and not suspended Red LED OFF indicates that the EVM is powered off or suspended Jumpers and Test Points 3 5 Jumpers and Test Points Table 3 2 describes the jumpers J1 and J2 used to connect P3 0 and P3 1 to D6 and D7 respectively which should only be done when P3 0 S0 and P3 1 S1 are not set to GND for VID PID selection see the TUSB2136 keyboard hub controller data sheet Table 3 2 also describes the various 0 2 resistors used as jumpers Test points are located throughout the EVM For location of these test points consult the layout in Section 5 Table 3 2 Jumpers and Test Points Jumpers Description J1 Installed connects P3 1 to D7 J2 Installed connects P3 0 to D6 0 Q resistors used to configure the TUSB2136 For proper operation with the firmware and RBO tru RSS EVM R30 R31 and R33 are installed at the factory R29 R36 R37 R38 0 0 resistors on power lines which may be removed to insert a current meter 3 6 EEPROM The EEPROM is used for application specific firmware The TUSB2136 will automatically read the EEPROM at power up via the I2C bus A header must be added to the application firmware before loading into the EEPROM This header format is specified in the boot
12. g conditions This evaluation kit being sold by TI is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not considered by TI to be fit for commercial use As such the goods being provided may not be complete in terms of reguired design marketing and or manufacturing related protective considerations including product safety measures typically found in the end product incorporating the goods As a prototype this product does not fall within the scope of the European Union directive on electromagnetic compatibility and therefore may not meet the technical reguirements of the directive Should this evaluation kit not meet the specifications indicated in the EVM User s Guide the kit may be returned within 30 days from the date of delivery for a full refund THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES EXPRESSED IMPLIED OR STATUTORY INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE The user assumes all responsibility and liability for proper and safe handling of the goods Further the user indemnifies TI from all claims arising from the handling or use of the goods Please be aware that the products received may not be regulatory compliant or agency certified FCC UL CE etc Due to the open construction of the product it is the user s responsibility to take any and all appropriate precautions with regard to ele
13. n Section 1 1 of this user s guide For a complete description ofthe TPS2149 device consultthe TPS2149 data sheet literature number SLVS401 3 2 Interfaces and USB Ports The EVM uses a standard Type B connector for the upstream port and two single Type A connectors for the downstream ports Power to the downstream ports is provided throught the TPS2149 Two edge connectors J3 and J4 connect to the TUSB2136 general purpose I O lines Out of 32 general purpose I O lines 26 are brought out to the J3 and J4 connectors The remaining 6 I O lines are used onboard to controlthe LEDs see Section 3 4 3 3 Power Supplies The USB keyboard hub EVM reguires no external power supply for operation The EVM receives power via the USB cable The TPS2149 low dropout regulator is used to generate the reguired 3 3 V supply from the USB 5 V supply The power indicator LED D1 will turn on whenever power is available to the EVM see Table 3 1 3 4 Light Emitting Diodes LEDs Severalonboard LEDs are provided on the EVM for guick and easy evaluation A set of six green LEDs D2 D7 connected to P3 0 through P3 5 of the TUSB2136 may be used for general purposes in any code that is written for the TUSB2136 see Table 3 1 By default the factory code provides the EVM with the use of only three of the LEDs as keyboard status indicators for Scroll Lock D2 Caps Lock D3 and Num Lock D4 The other three are not used Table 3 1 LED D
14. t copyright mask work right or other TI intellectual property right relating to any combination machine or process in which TI products or services are used Information published by TI regarding third party products or services does not constitute a license from TI to use such products or services or a warranty or endorsement thereof Use of such information may reguire a license from a third party under the patents or other intellectual property of the third party or a license from TI under the patents or other intellectual property of TI Reproduction of information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties conditions limitations and notices Reproduction of this information with alteration is an unfair and deceptive business practice TI is not responsible or liable for such altered documentation Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all express and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice TI is not responsible or liable for any such statements Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265 Copyright 2001 Texas Instruments Incorporated EVM IMPORTANT NOTICE Texas Instruments provides the enclosed product s under the followin
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