Datasheet

175
SAM9263 [DATASHEET]
Atmel-6249N-ATARM-SAM9263-Datasheet_14-Mar-16
20.5.6.4 Multiplexing of CompactFlash Signals on EBI Pins
Table 20-9 and Table 20-10 illustrate the multiplexing of the CompactFlash logic signals with other EBI signals on
the EBI pins. The EBI pins in Table 20-9 are strictly dedicated to the CompactFlash interface as soon as the
EBI0_CS4A and/or EBI0_CS5A (bit)s of the EBI0 Chip Select Assignment Register in the Chip Configuration User
Interface is set. These pins must not be used to drive any other memory devices.
The EBI pins in Table 20-10 remain shared between all memory areas when the corresponding CompactFlash
interface is enabled (EBI0_CS4A = 1 and/or EBI0_CS5A = 1).
Table 20-9. Dedicated CompactFlash Interface Multiplexing
Pins
CompactFlash Signals EBI Signals
CS4A = 1 CS5A = 1 CS4A = 0 CS5A = 0
NCS4/CFCS0 CFCS0 NCS4
NCS5/CFCS1 CFCS1 NCS5
Table 20-10. Shared CompactFlash Interface Multiplexing
Pins
Access to CompactFlash Device Access to Other EBI Devices
CompactFlash Signals EBI Signals
NRD/CFOE CFOE NRD
NWR0/NWE/CFWE CFWE NWR0/NWE
NWR1/NBS1/CFIOR CFIOR NWR1/NBS1
NWR3/NBS3/CFIOW CFIOW NWR3/NBS3
A25/CFRNW CFRNW A25