at91sam9g20-cu ATMEL Corporation, at91sam9g20-cu Datasheet - Page 144

• Manufacturer Part Number: at91sam9g20-cu
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

Table 20-7.
20.6.6.4
Table 20-8.
144
Attribute Memory
Common Memory
I/O Mode
True IDE Mode
Pins
NCS4/CFCS0
NCS5/CFCS1
Mode Base Address
AT91SAM9G20 Preliminary
Multiplexing of CompactFlash Signals on EBI Pins
CompactFlash Mode Selection
Dedicated CompactFlash Interface Multiplexing
CS4A = 1
CFCS0
Figure 20-4. CompactFlash Read/Write Control Signals
Table 20-8 on page 144
Flash logic signals with other EBI signals on the EBI pins. The EBI pins in
dedicated to the CompactFlash interface as soon as the EBI_CS4A and/or EBI_CS5A field of
the EBI_CSA 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
responding CompactFlash interface is enabled (EBI_CS4A = 1 and/or EBI_CS5A = 1).
CFOE
NRD
CompactFlash Signals
1
0
External Bus Interface
Table 20-9 on page 145
SMC
NWR0_NWE
CS5A = 1
CFCS1
NRD_NOE
and
A23
A22
NWR0_NWE
Table 20-9 on page 145
CFWE
1
1
remain shared between all memory areas when the cor-
CS4A = 0
NCS4
1
1
0
1
0
1
illustrate the multiplexing of the Compact-
CompactFlash Logic
CFIOR
NRD
NRD
1
1
1
EBI Signals
0
1
0
1
CS5A = 0
NCS5
Table 20-8
6384B–ATARM–15-Dec-08
CFOE
CFWE
CFIOR
CFIOW
NWR0_NWE
NWR0_NWE
CFIOW
1
are strictly