National Semiconductor BQ2026 User manual

User's Guide
SLUU763A–December 2011–Revised November 2015
bq2026 Evaluation Software
The purpose of the bq2026 evaluation board and the bq2026EVM evaluation software is to demonstrate
the functionality of the bq2026. The bq2026 evaluation board supports both the bq2026DBZR (SOT23-3)
and bq2026LPR (TO-92) packages but only one package can be evaluated/programmed at any time.
The bq2026 is a 1.5K-bit serial EPROM containing a factory-programmed, unique 48-bit identification
number, 8-bit family code, and a 64-bit status register.
The bq2026 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 bq2026-Based Circuit Module.............................................................................................. 2
2.1 Test Points........................................................................................................... 2
3 bq2026EVM Circuit Module Schematic................................................................................... 2
4 bq2026EVM Circuit Module Physical Layouts ........................................................................... 3
5 bq2026EVM Circuit Module Bill of Materials............................................................................. 5
6 bq2026EVM Circuit Module Performance Specification Summary.................................................... 6
7 bq2026EVM Hardware and Software Setup ............................................................................. 6
7.1 Drivers and Software Installation` ................................................................................ 6
7.2 Hardware Connection .............................................................................................. 6
8 Software Operation.......................................................................................................... 7
8.1 Evaluation Software Pages........................................................................................ 7
8.2 ROM CMD........................................................................................................... 7
8.3 DATA................................................................................................................. 8
List of Figures
1 bq2026EVM Schematic..................................................................................................... 2
2 bq2026EVM Silk Screen.................................................................................................... 3
3 bq2026EVM Top Assembly ................................................................................................ 4
4 bq2026EVM Top Layer ..................................................................................................... 4
5 bq2026EVM Bottom Layer.................................................................................................. 5
6 ROM CMD Page............................................................................................................. 8
7 DATA Page................................................................................................................... 9
List of Tables
1 Test Points.................................................................................................................... 2
2 Bill of Materials............................................................................................................... 5
3 Performance Specification Summary ..................................................................................... 6
4 Wire Connection ............................................................................................................. 7
1
SLUU763A–December 2011–Revised November 2015 bq2026 Evaluation Software
Submit Documentation Feedback Copyright © 2011–2015, Texas Instruments Incorporated

Kit Contents www.ti.com
1 Kit Contents
1. bq2026EVM REVA board
2 bq2026-Based Circuit Module
The bq2026-based circuit module is ideal for programming the 1.5K-bit EPROM and the STATUS bytes of
the bq2026 IC. The circuit module includes a SOT23 single socket, a bq2026 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 bq2026 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
3 bq2026EVM Circuit Module Schematic
The schematic shows the circuit for the bq2026 implementation.
Figure 1. bq2026EVM Schematic
2bq2026 Evaluation Software SLUU763A–December 2011–Revised November 2015
Submit Documentation Feedback
Copyright © 2011–2015, Texas Instruments Incorporated

www.ti.com bq2026EVM Circuit Module Physical Layouts
4 bq2026EVM Circuit Module Physical Layouts
This section contains the board layout and assembly drawings for the bq2026EVM circuit module.
Figure 2. bq2026EVM Silk Screen
3
SLUU763A–December 2011–Revised November 2015 bq2026 Evaluation Software
Submit Documentation Feedback Copyright © 2011–2015, Texas Instruments Incorporated

bq2026EVM Circuit Module Physical Layouts www.ti.com
Figure 3. bq2026EVM Top Assembly
Figure 4. bq2026EVM Top Layer
4bq2026 Evaluation Software SLUU763A–December 2011–Revised November 2015
Submit Documentation Feedback
Copyright © 2011–2015, Texas Instruments Incorporated

www.ti.com bq2026EVM Circuit Module Bill of Materials
Figure 5. bq2026EVM Bottom Layer
5 bq2026EVM Circuit Module Bill of Materials
Table 2 presents the bill of materials required for the bq2026EVM circuit module.
Table 2. Bill of Materials
Count RefDes Description Size MFR Part Number
2 D1, D2 Diode, Zener, 5.6-V, 350-mW SOT-23 Diodes, Inc. BZX84C5V6
1 J3 Header, 2-pin, 100-mil spacing, (36-pin strip) 0.100 x 2 Sullins PTC36SAAN
3 R1, R2, R6 Resistor, Chip, 100-Ω, 1/16-W, 5% 603 Std Std
1 R3 Resistor, Chip, 100-kΩ, 1/16-W, 5% 603 Std Std
1 R4 Resistor, Chip, 10-kΩ, 1/16-W, 5% 603 Std Std
1 R5 Resistor, Chip, 15-kΩ, 1/16-W, 5% 603 Std Std
0 R7*, R8* Resistor, Chip, 2.7-kΩ, 1/16-W, 5% 603 Std Std
1 XU1 Socket, SOT-23, 6P SOT-23-6 WELLS-CTI 499-P44-20
1 J1 Header, Friction Lock Ass'y, 4-pin Right Angle 0.400 x 0.500 Molex 22-05-3041
1 J2 Terminal Block, 2-pin, 6-A, 3.5-mm 0.27 x 0.25 inch OST ED1514
0 GND* Test Point, Black, 1-mm 0.038 Keystone 5001
0 SDQ* Test Point, Red, 1-mm 0.038 Keystone 5000
2 U2,U3* Socket Pin - Install First DIA_038, PIN_013-020, EXP_146, Tyco 50935
B125
1 Q1 MOSFET, N-ch, 60-V, 115-mA, 1.2-ΩSOT23 Vishay-Liteon 2N7002-7-F
1 Q2 MOSFET, Pch, -20-V, 3.7-A, 65 mΩSOT23 IR IRLML6402
1 -- PCB, 2 In x 1.25 In x 0.125 In Any bq2026EVM Board
1 N/A Shunt, 100-mil, Black 0.1 3M 929950-00
1 U1 bq2026, IC, 1.5K Serial EPROM With SDQ Interface SOT-23 TI bq2026DBZR
5
SLUU763A–December 2011–Revised November 2015 bq2026 Evaluation Software
Submit Documentation Feedback Copyright © 2011–2015, Texas Instruments Incorporated

bq2026EVM Circuit Module Performance Specification Summary www.ti.com
6 bq2026EVM Circuit Module Performance Specification Summary
Table 3. Performance Specification Summary
Specification Min Typ Max Unit
Voltage Pullup (VUP) 2.65 5.5 V
Programming Voltage(VPP) 11.5 12 V
7 bq2026EVM Hardware and Software Setup
7.1 Drivers and Software Installation`
This section describes how to install the bq2026EVM PC software and how to connect the different
components of the EVM.
Perform the following steps to install the bq2026 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 the 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 C:\WINDOWS\TI\USB1.
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 preceding
procedure, but point to C:\WINDOWS\TI\USB2.
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.
11. After installing the USB drivers for EV2300, double-click on the Setup.exe icon that is under the
Software/bq2026 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 bq2026EVM has three hardware components:
1. The bq2026EVM circuit module
2. The PC interface board, (EV2300)
3. The PC
Perform the following steps to configure the hardware for interface to the PC:
1. Connect the bq2026EVM 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 bq2026EVM is now set up for normal operation.
6bq2026 Evaluation Software SLUU763A–December 2011–Revised November 2015
Submit Documentation Feedback
Copyright © 2011–2015, Texas Instruments Incorporated

www.ti.com Software Operation
Table 4. Wire Connection
bq2026EVM REVA EV2300
SDQ HDQ
VSS GND
PROG VOUT
To program the EPROM of bq2026EVM, a 12-V pulse must be generated on the SDQ line. The
bq2026EVM 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 be connected to the bq2026EVM board
at the 12-V input terminal of the bq2026EVM 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 1.5K-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 during a write command.
See the bq2026 data sheet (SLUS938) 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 bq2026EVM board.
• Power supply set to 12 V is connected across the 12-V and VSS inputs of bq2026EVM board.
8 Software Operation
Run the program from the Start →Programs →Texas Instruments →bq2026 Evaluation Software menu
sequence.
8.1 Evaluation Software Pages
This section describes the function of each page of the evaluation program.
8.2 ROM CMD
This page provides all the ROM commands for bq2026 (see Figure 6).
8.2.1 Sections Within the ROM CMD Page
Read ROM — The ID ROM of the device on the SDQ communication line is displayed when READ ID is
clicked.
7
SLUU763A–December 2011–Revised November 2015 bq2026 Evaluation Software
Submit Documentation Feedback Copyright © 2011–2015, Texas Instruments Incorporated

Software Operation www.ti.com
Figure 6. ROM CMD Page
8.3 DATA
This page (see Figure 7) allows the user to program the 1.5K-bit EPROM with desired values and to
program the STATUS bytes. It requires that the hardware is set up as described in the EPROM
programming of this user's guide.
8.3.1 1.5K-Bit EPROM
The EPROM memory map is organized in six pages of 32 bytes each. All registers can be read by clicking
on the Read Memory button. As the registers of a specific page are being read, the page number is
highlighted in red.
The two methods of programming the EPROM using the evaluation program follow.
1. Click on a specific grid that corresponds to the register that needs to be written. Write the hexadecimal
value of the data that needs to be written, and then press ENTER.
2. The other method of programming the EPROM is by importing a data file that contains all the values to
be programmed. The data file has the file extension .epr. An example of a data file is included with the
evaluation program. To create additional data files, modify the example file so that the values on the
right side of the file represent the desired values. Save the file with a different name ensuring that the
extension .epr is used. To import a file into the grid, go to File →Open Data File, and select the
appropriate file. Once the file is opened, the grid is filled in with the values contained in the data file.
8bq2026 Evaluation Software SLUU763A–December 2011–Revised November 2015
Submit Documentation Feedback
Copyright © 2011–2015, Texas Instruments Incorporated

www.ti.com Software Operation
Click on the Write Memory button so that the values are programmed into the EPROM.
A data file can also be saved by going to File|Save Data File. The data that is saved in the file is the data
displayed on the grids representing the EPROM memory map.
8.3.2 Status Bytes
This section allows the user to read or write the EPROM Status bytes of the bq2026. The registers are
programmed by clicking on the appropriate grid, entering the desired value, and pressing ENTER.
Note that the status registers are EPROM. Once a bit has been cleared, it cannot be set.
Figure 7. DATA Page
9
SLUU763A–December 2011–Revised November 2015 bq2026 Evaluation Software
Submit Documentation Feedback Copyright © 2011–2015, Texas Instruments Incorporated

Revision History www.ti.com
Revision History
Changes from Original (December 2011) to A Revision ................................................................................................ Page
• Deleted list items 2: "Personal computer (PC) interface board EV2300" and 3: "USB cable (type A-B)" from Section 1... 2
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
10 Revision History SLUU763A–December 2011–Revised November 2015
Submit Documentation Feedback
Copyright © 2011–2015, Texas Instruments Incorporated