I have met some questions about UJA1135 SBC’ SPI communication.
1. When I tried to control MCU to read the contents of any selected register in SBC by SPI, the data returned was always 0.
2. I want to configurate the LIMP pin into outputting the low level and the HVIO4 pin into the high level, so I write 0x02(address), 0x04(data) and 0x33(address),0x0D(data). And I know the LSB of the address should be 0 to indicate a write operation. However, these operations failed.
I wonder if there are someplace that I neglected or I did something wrong.