Dear champs,
I am asking this for our customer.
The user follows below to start up TRF7970A,
Then, use below for initialization.
Then, use host MCU SPI to read registers below. But it is weird that all of the registers are all 0x00, which is not expected.
The user uses host MCU SPI to read the above registers from TRF7970A like below. For example, if they want to read addressing 0x09, then the user send 0x49 first and then send 0x00 to get the above register value.
Questions:
1. Why the read register values are all 0x00?
2. Would you please help clarify if the above procedures are wrong?