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TAS5731M: BQ register changed after config

Part Number: TAS5731M


Dear Ti Experts,

Below is the issue about BQ register changed after download, could you give some suggestions why BQ registers changed after download? thanks a lot.

Software: TAS57X1 GDE from PC

Hardware: TAS5731M EVM------i2c------customer own board with TAS5731M integrated

Details: Config I2C register, save cfg file, download to TAS5731M, then read back through GDE and compare all the register's values

result:

Most I2C register keep the same value only 3 bytes changed from 0xF to 0x3, which are inside register 0x2A and 0x2B

----------------------------------Config register---------------------------

0x2A 00 7F D2 87 0F 00 5A F1 00 7F D2 87 00 FF A4 FF 0F 80 5A E1 
0x2B 00 00 01 FF 00 00 03 FF 00 00 01 FF 00 FD 27 FF 0F 82 D0 01

----------------------------------read back register---------------------------

0x2A 00 7F D2 87 03 00 5A F1 00 7F D2 87 00 FF A4 FF 03 80 5A E1 
0x2B 00 00 01 FF 00 00 03 FF 00 00 01 FF 00 FD 27 FF 03 82 D0 01