BQ40Z50: Write SREC (SENC) to bq40XXX (hwplatform 9001, 9002, 9100, 9200)

Vladimir5

Part Number: BQ40Z50
Other Parts Discussed in Thread: BQPRODUCTION, BQSTUDIO

I am writing a program for mass production.

I need to make a quick SREC (or SENC) write to the chip.
I know that checking a IFIB block's record can be done with a checksum check.

But I do not understand the algorithm for calculating the checksum.

Example:
Block = "FF FF FF.... FF FF FF" ( = 32 bytes)
CS = "EB26"

Dear experts - please help.
Explain to me - how to calculate the checksum of a IFIB block?

over 5 years ago

0 Swaminathan Ramanathan75031 over 5 years ago

TI__Expert 6575 points

Hi,
I would not recommend programming srec for production, it is much better to program only the data flash section to update the settings and chemistry information.
If you do need to program the srec, I would recommend using TI tools such as bqStudio or the bqProduction with the bqMAdvanceTester to program the srec.
Also, the IFIB checksum calculation process is proprietary and can not be disclosed unfortunately.
Regards,
Swami

0 Vladimir5 over 5 years ago in reply to Swaminathan Ramanathan75031

Intellectual 380 points

Thank you so much for your help me

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BQ40Z50: Write SREC (SENC) to bq40XXX (hwplatform 9001, 9002, 9100, 9200)