Rainbow Electronics AT91CAP9S250A - Manual (Page 167)

167
6264A–CAP–21-May-07
AT91CAP9S500A/AT91CAP9S250A
21.6.9.2 Software Configuration
The following configuration has to be performed:
• Assign the EBI CS4 and/or EBI_CS5 to the CompactFlash Slot 0 or/and Slot 1 by setting
the bit EBI_CS4A or/and EBI_CS5A in the EBI Chip Select Assignment Register located in
the bus matrix memory space.
• The address line A21 is to select Alternate True IDE (A21=1) or True IDE (A21=0) modes.
• CFRNW, CFS0, CFCS1, CFCE1 and CFCE2 signals are multiplexed with PIO lines and
thus the dedicated PIOs must be programmed in peripheral mode in the PIO controller.
• Configure a PIO line as an output for CFRST and two others as an input for CFIRQ and
CARD DETECT functions respectively.
• Configure SMC CS4 and/or SMC_CS5 (for Slot 0 or 1) Setup, Pulse, Cycle and Mode
accordingly to Compact Flash timings and system bus frequency.