BQ34Z100-R2: BQ34Z100-R2

Tool/software:

Hi, I’m Luis.

I

I’m trying to read the Device ID (0x0001) from the BQ34Z100-R2 using the HDQ interface on STM32.
The control register address is 0x00.

However, I can’t find a clear explanation of the 2-byte write/read protocol in TI’s HDQ documentation.

Could you please confirm the correct sequence?

1. To read the Device ID value, should I write the following sequence?

   • Write Control register (0x00 | 0x80)

   • Write lower byte of Device ID (0x01 | 0x80)

   • Write upper byte of Device ID (0x00 | 0x80)

2. What is the correct 2-byte read sequence for this operation?
   Should it be:
   Write address → break → write(?) → read(?) → break → write(?) → read(?) ?