Datasheet

151
SAM9261 [DATASHEET]
Atmel-6062O-ATARM-SAM9261-Datasheet_21-Jun-16
19.7.6.1 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 EBI_CS4A
or/and EBI_CS5A bit(s) in the EBI Chip Select Assignment Register located in the bus matrix memory
space.
 The address line A23 is to select I/O (A23=1) or Memory mode (A23=0) and the address line A22 for REG
function.
 A23, 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.