ARM IM-AD1 - Manual (Page 60)

Reference Design Example
4-14 Copyright © 2001-2003. All rights reserved. ARM DUI 0163B
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