In LS1046A datasheet, SPI_PCS[0-3] and SDHC_DAT[4-7] are multiplexes。
If I want to use 8bit EMMC and SPI interface at the same time, how to design on hardware? Does the software have a corresponding driver?
SPI shares signals with eSDHC in way that prevents using 8-bit eMMC and SPI at the same time. Functionality of SPI_PCS[0-3]/SDHC_DAT[4-7] pins is determined by the configuration word (RCW). The RCW is read from some nonvolatile memory on power-on reset (PORESET) only. The PORESET causes the chip to abort all current internal and external transactions and set all registers to their default values.
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