Datasheet

166
32072H–AVR32–10/2012
AT32UC3A3
14.5 Product Dependencies
In order to use this module, other parts of the system must be configured correctly, as described
below.
14.5.1 I/O Lines
The pins used for interfacing the compliant external devices may be multiplexed with I/O Con-
troller lines. The user must first configure the I/O Controller to assign the EBI pins to their
peripheral functions.
14.5.2 Power Management
To prevent bus errors EBI operation must be terminated before entering sleep mode.
14.5.3 Clocks
A number of clocks can be selected as source for the EBI. The selected clock must be enabled
by the Power Manager.
The following clock sources are available:
• CLK_EBI
• CLK_SDRAMC
• CLK_SMC
ADDR[17]
BA1
ADDR[17]
SDRAMC Bank 1
SMCAddress Bus Line 17
Output
SMC/CompactFlash shared lines
NRD
NRD
CFNOE
SMC Read Signal
CompactFlash CFNOE
Output Low
NWE0
NWE0-NWE
CFNWE
SMC Write Enable10 or Write enable
CompactFlash CFNWE
Output Low
NCS[4]
NCS[4]
CFCS[0]
SMC Chip Select Line 4
CompactFlash Chip Select Line 0
Output Low
NCS[5]
NCS[5]
CFCS[1]
SMC Chip Select Line 5
CompactFlash Chip Select Line 1
Output Low
SMC/NAND Flash/SmartMedia shared lines
NCS[2]
NCS[2]
NANDCS[0]
SMC Chip Select Line 2
NANDFlash/SmartMedia Chip Select Line
0
Output Low
NCS[3]
NCS[3]
NANDCS[1]
SMC Chip Select Line 3
NANDFlash/SmartMedia Chip Select Line
1
Output Low
SDRAMC/SMC/CompactFlash shared lines
NWE1
DQM1/
NWE1-NBS1/
CFNIORD
SDRAMC DQM1
SMC Write Enable1 or Byte Select 1
CompactFlash CFNIORD
Output
Pin Name
Alternate
Name Pin Description Type
Active
Level