Texas Instruments bq2022A User manual

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bq2022A Evaluation Software
User's Guide
SLUU258B–November 2007–Revised July 2017
bq2022A Evaluation Software
The bq2022A is a 1 K-bit serial EPROM containing a factory-programmed, unique 48-bit identification
number, 8-bit CRC generation, and an 8-bit family code. A 64-bit status register controls write protection
and page redirection.
The purpose of the evaluation software is to demonstrate the functionality of the bq2022A. The bq2022A
evaluation board can be used for one or two ICs.
The bq2022A is ideal for applications such as battery pack configuration parameters, record maintenance,
asset tracking, product revision status, and access-code security.
Contents
1 Kit Contents................................................................................................................... 2
2 bq2022A-Based Circuit Module............................................................................................ 2
3 bq2022A Circuit Module Schematic....................................................................................... 3
4 Circuit Module Physical Layouts........................................................................................... 4
5 bq2022A Circuit Module List of Materials................................................................................. 8
6 bq2022AEVM Circuit Module Performance Specification Summary.................................................. 8
7 EVM Hardware and Software Setup ...................................................................................... 8
8 Software Operation ........................................................................................................ 10
List of Figures
1 EVM Schematic.............................................................................................................. 3
2 Silk Screen ................................................................................................................... 4
3 EVM Top Assembly ......................................................................................................... 5
4 EVM Layer One.............................................................................................................. 6
5 EVM Layer Two.............................................................................................................. 7
6 ROM CMD Page ........................................................................................................... 11
7 DATA Page ................................................................................................................. 12
List of Tables
1 Test Points.................................................................................................................... 2
2 List of Materials .............................................................................................................. 8
3 Performance Specification Summary ..................................................................................... 8
4 Wire Connection ............................................................................................................. 9
Trademarks
Microsoft, Windows are registered trademarks of Microsoft Corporation.
All other trademarks are the property of their respective owners.

Kit Contents www.ti.com
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1 Kit Contents
1. bq2022A, HPA125 revision-B board
2. CD-ROM including Microsoft®Windows®based PC software and support documentation
NOTE: An EV2300 board is required to interface this EVM with the PC and can be purchased
separately.
The EV2400 up through at least version 0.18 does not support this EVM.
2 bq2022A-Based Circuit Module
The bq2022A-based circuit module is ideal for programming the 1 K-bit EPROM and the STATUS bytes of
the bq2022A IC. The circuit module includes a 3-pin SOT23 dual socket, a bq2022A IC, a Zener diode for
host protection during EPROM programming, and a programming circuit that generates a 12-V pulse when
used with a power supply and a control signal. In a typical application, only the bq2022A IC and a pullup
resistor is required.
2.1 Test Points
Table 1. Test Points
Test Point SIGNAL NAME DESCRIPTION
J1-1 VSS Device ground
J1-2 PROG Input for timing of EPROM programming pulse
J1-3 SDQ SDQ single-wire communication bus
J2-1 12V High voltage for EPROM programming
J2-2 VSS Programming ground
J3 Connect for EPROM programming

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3 bq2022A Circuit Module Schematic
The schematic shows the circuit for the bq2022AEVM implementation.
Figure 1. EVM Schematic

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4 Circuit Module Physical Layouts
This section contains the board layout and assembly drawings for the bq2022AEVM circuit module.
Figure 2. Silk Screen

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Figure 3. EVM Top Assembly

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Figure 4. EVM Layer One

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Figure 5. EVM Layer Two

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5 bq2022A Circuit Module List of Materials
List of materials required for the bq2022AEVM circuit module.
Table 2. List of Materials
REF DES QTY DESCRIPTION MFR PART NUMBER
D1, D2 1 Diode, Zener, 5.6-V, 350-mW Diodes, Inc. BZX84C5V6
J3 1 Header, 2-pin, 100-mil spacing, (36-pin strip) Sullins PTC36SAAN
R1, R2, R6 3 Resistor, Chip, 100-Ω, 1/16-W Std Std
R3 1 Resistor, Chip, 100-kΩ, 1/16-W Std Std
R4 1 Resistor, Chip, 10-kΩ, 1/16-W Std Std
XU1 1 Socket, Double 3P SOT-23 Loranger 13293 121 X218A
J1 1 Header, Friction Lock Ass'y, 4-pin Right Angle Molex 22-05-3041
J2 1 Terminal Block, 2-pin, 6-A, 3.5-mm OST ED1514
VSS1, VSS2 2 Test Point, Black, 1-mm Keystone 5001
SDQ1, SDQ2 2 Test Point, Red, 1-mm Keystone 5000
Q1 1 MOSFET, N-ch, 60-V, 115-mA, 1.2-ΩVishay-Liteon 2N7002DICT
Q2 1 MOSFET, Pch, -20V, 3.7A, 65 mΩIR IRLML6402
U1 1 IC, 1 K Serial EPROM With SDQ Interface TI bq2022ADBZR
– 1 PCB, 2 In x 1.25 In x .125 In Any HPA125 Rev. B Board
N/A 1 Shunt, 100-mil, Black 3M 929950-00
6 bq2022AEVM Circuit Module Performance Specification Summary
Table 3. Performance Specification Summary
SPECIFICATION MIN TYP MAX UNITS
Voltage Pullup (VUP) 2.65 5.5 V
Programming Voltage(VPP) 11.5 12 V
7 EVM Hardware and Software Setup
7.1 Drivers and Software Installation
This section describes how to install the bq2022AEVM PC software, and how to connect the different
components of the EVM.
Use the following steps to install the bq2022A evaluation software:
1. Insert the CD ROM into a CD ROM drive.
2. Select the CD ROM drive using My Computer or File Manager.
3. Select the ReadMeFirst.txt file.
4. Select the Software/EV2300 Drivers directory of CD and run SETUP.EXE.
5. Plug the EV2300 into a USB port.
6. Wait until system prompt new hardware found appears. Choose select location manually, and use the
browse button to point to subdirectory TIUSBWin2K-XP-1.
7. Answer continue to the warning that drivers are not certified with Microsoft.
8. After installation finishes, another system prompt new hardware found appears. Repeat procedure
above, but point to subdirectory TIUSBWin2K-XP-2.
9. Answer continue to the warning that drivers are not certified with Microsoft. Installation of drivers is
now finished.
10. For Windows 98, point to directory TIUSBWin98.

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11. After installing the USB drivers for EV2300, double-click on the Setup.exe icon that is under the
Software/bq2022A Evaluation Software folder.
12. Follow the instructions on screen during the installation of evaluation software.
13. The setup program installs a Windows application group.
7.2 Hardware Connection
The bq2022AEVM has three hardware components. :
1. The bq2022AEVM circuit module
2. The PC interface board, (EV2300 – purchased separately)
3. The PC
Use the following steps to configure the hardware for interface to the PC:
1. Connect the HPA125 board with the EV2300 PC interface board using Table 4 as a pin connection
guide.
2. Connect the USB cable to the EV2300 and the PC USB port.
The bq2022AEVM is now set up for normal operation.
Table 4. Wire Connection
bq2022AEVM (HPA125 Rev. B) EV2300
SDQ HDQ
VSS GND
PROG VOUT
To program the EPROM of bq2022AEVM, a 12-V pulse must be generated on the SDQ line. The HPA125
board has an additional circuit included that permits generating this pulse when using a power supply set
to 12 V and the VOUT output of the EV2300. The evaluation software controls this pulse for EPROM
programming.
When programming the EPROM, it is expected that a 12-V supply must be connected to the HPA125
board at the 12-V input terminal of the HPA125 board. Ensure that the ground of the power supply is
connected to VSS of the board.
A jumper (J3) must be connected when using the EPROM programming circuit.
7.2.1 Normal Operation
Normal operation includes performing any of the ROM commands, reading the 1 K-bit EPROM and
reading the EPROM Status Memory.
7.2.2 EPROM Programming
To program EPROM registers, a 12-V pulse must be sent across the SDQ line after sending the code
0x5A during a write command. See the bq2022A data sheet (SLUS724) for a specific description of
EPROM programming requirements. When programming EPROM registers, the following must be
ensured:
• J3 jumper is connected.
• VOUT output of EV2300 is connected to PROG input of HPA125 board.
• Power supply set to 12 V is connected across the 12 V and VSS inputs of HPA125 board.

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8 Software Operation
Run the program from the Start|Programs|Texas Instruments|bq2022A Evaluation Software menu
sequence.
8.1 Evaluation Software Pages
This section describes the function of each page of the EVSW.
8.2 ROM CMD
This page provides all the ROM commands for bq2022A (see Figure 6).
8.2.1 Sections Within the ROM CMD Page
Application — This section determines the number of bq2022A devices that are on the SDQ bus. If only
one device is used, then select Single Device. This option sends the SKIP ROM command before
any communication attempt is made with the device. If more than one device is used, then select
Multiple Devices. This option sends the MATCH ROM command before any communication attempt
is made with the desired device
Search ROM — This section demonstrates the SEARCH ROM command. When multiple devices are on
the SDQ bus, the ROM ID of the devices that share the bus is listed.
Match ROM — This section is only available when the Multiple Devices option is selected in the
Application section. To use the MATCH ROM, enter the ROM ID of the device of interest in the text
box, and then click on the Select Device button. This causes the MATCH ROM commands with the
desired ROM ID to be sent whenever communication is attempted with the desired device. If
SEARCH ROM is used, the desired ID can be copied from the SEARCH ROM list, and then pasted
into the MATCH ROM text box. Ensure that only the ID numbers are pasted into the text box and
not the whole line referring to the device.
Read ROM — This section is only available when the Single Device option is selected in the Application
section. The ID ROM of the device on the SDQ communication line is displayed.