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Reference Design Example

4.4 SPI chip select register

This is a 3-bit read/write register that controls the three chip select signals on the

connectors J11 and J13. Writing a 1 causes the associated SPI chip select signal to go

LOW.

Table 4-8 SPI chip select register bit assignment

Bit Name Access Function

2 SPICS2 Read/write 0 = SPI_nCS2 is HIGH

1 = SPI_nCS2 is LOW

1 SPICS1 Read/write 0 = SPI_nCS1 is HIGH

1 = SPI_nCS1 is LOW

0 SPICS0 Read/write 0 = SPI_nCS0 is HIGH

1 = SPI_nCS0 is LOW

1 2 ... 55 56 57 58 59 60 61 62 63 64 65 ... 91 92

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