Datasheet

SAM9G45 [DATASHEET]
Atmel-6438O-ATARM-SAM9G45-Datasheet_08-Dec-15
184
Software Configuration - CompactFlash
The following configuration has to be performed:
 Assign the EBI CS4 and/or EBI_CS5 to the CompactFlash Slot 0 and/or Slot 1 by setting the bit EBI_CS4A
and/or EBI_CS5A 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.
 A22, 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
CompactFlash timings and system bus frequency.