Software Operation

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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.

8

bq2026 Evaluation Software

SLUU763

– December 2011

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© 2011, Texas Instruments Incorporated