LS1043A SPI and eSDHC Chip Select Conflict

ian_m — Fri, 10 Jun 2022 13:51:59 GMT

It seems that the designated chip select pins for the SPI interface are muxed with the DATA[4:7] pins for the eSDHC interface, which means I can't use the eSDHC interface in 8-bit mode to connect to an eMMC if I also want SPI device(s)...?

Do I really have to sacrifice ~50% of my eMMC throughput to use an SPI device, or is there some way of assigning an unused GPIO pin for use as SPI Chip Selects?

Ian

Re: LS1043A SPI and eSDHC Chip Select Conflict

yipingwang — Wed, 15 Jun 2022 05:16:32 GMT

Customer can use 4-bit mode of eSDHC interface if they are using SPI and eSDHC simultaneously.

Each of the muxed pins cannot be independently configured therefore we cannot assign an unused GPIO pin for SPI Chip Selects

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LS1043A SPI and eSDHC Chip Select Conflict

Re: LS1043A SPI and eSDHC Chip Select Conflict