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UJA1135 System Base Chip SPI Communication

Question asked by Ashlie Huang on Aug 23, 2018
Latest reply on Aug 28, 2018 by Ashlie Huang

Hi,

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.

Thanks.

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