BQ27531-G1: How to restore firmware mode to ROM mode

Lawrence He

Expert 2440 points

Part Number: BQ27531-G1
Other Parts Discussed in Thread: BQEVSW, BQ27530-G1

Hi, Support Team

about BQ27531 device, How to restore firmware mode to ROM mode?

if any, Please advise me.

Thank you.

Best regards,

Lawrence

over 1 year ago

0 Shirish over 1 year ago

TI__Guru 57747 points

Hello Lawrence,

Do you mean how to restore the firmware to original factory state? If you meant actual ROM mode, then can you help us understand what you are trying to do?

0 Lawrence He over 1 year ago in reply to Shirish

Expert 2440 points

Hi, Shirish

Do you mean how to restore the firmware to original factory state?

Yes!

By the way, that is history

https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1128072/bq27530-g1-bq27530-g1-can-t-be-program-and-we-try-to-use-ev2300-program-the-chip-it-will-shut-down-when-it-program-process/4189474#4189474

if any, Please advise me,

Thanks,

Best regards,

Lawrence

0 Shirish over 1 year ago in reply to Lawrence He

TI__Guru 57747 points

Hello Lawrence,

The default firmware is at https://www.ti.com/lit/zip/sluc415

This firmware can be programmed using the bqEVSW and EV2300. The Pro screen of bqEVSW has the feature to program senc files.

Steps:

1. Check that you can communicate with BQ27530-G1 at I2C target address 0xAA(returned data should be valid)

2.Then at I2C target address 0xAA, write block 0x00 0x0F to memory address 0x00 to put it into programming mode.

3. Check that you can communicate at I2C target address 0x16 (data should be returned but will be random/invalid data)

4. Program the senc file

5. If step 4 succeeded with no error messages, then click the "Execute" button and restart bqEVSW, otherwise retry step 4 till it succeeds.

Power management

Power management forum

BQ27531-G1: How to restore firmware mode to ROM mode