
171
32072H–AVR32–10/2012
AT32UC3A3
Figure 14-3. CompactFlash Read/Write Control Signals
14.6.5.4
Multiplexing of CompactFlash signals on EBI pins
strictly dedicated to the CompactFlash interface as soon as the HMATRIX.SFR6.CS4A and/or
HMATRIX.SFR6.CS5A bits is/are written. These pins must not be used to drive any other mem-
ory devices.
responding CompactFlash interface is enabled (CS4A = 1 and/or CS5A = 1).
Table 14-6.
CompactFlash Mode Selection
Mode Base Address
CFNOE
CFNWE
CFNIORD
Attribute Memory
I/O Mode (Write operations)
Common Memory
NRD_NOE
NWR0_NWE
1
I/O Mode (Read operations)
1
NRD_NOE
A22
A23
SMC
NRD
NWR0/NWE
Compact Flash Logic
EBI
1
0
1
0
1
CFNOE
CFNWE
CFNIORD
Table 14-7.
Dedicated CompactFlash Interface Multiplexing
Pins
CompactFlash Signals
EBI Signals
CS4A = 1
CS5A = 1
CS4A = 0
CS5A = 0
NCS[4]
CFCS0
NCS[4]
NCS[5]
CFCS1
NCS[5]