Datasheet

345
8331B–AVR–03/12
Atmel AVR XMEGA AU
Table 27-6. Pin-out for SRAM and SRAM LPC when combined with SDRAM (four-port only).
PORT PIN SRAM LPC
ALE1
(with SDRAM)
SRAM LPC
ALE12
(with SDRAM)
SRAM
ALE1
(with SDRAM)
SRAM
ALE12
(with SDRAM)
PORT3
7:4 CS[3:0]
(A[23:20])
CS[3:0]
(A[23:20])
CS[3:0]
(A[23:20])
CS[3:0]
3:0 A[15:8] A[19:16] A[19:16]
–
PORT2 7:0 A[15:8]
–
A[7:0]/
A[15:8]
A[7:0]/
A[15:8]/
A[23:16]
PORT1 7:0 D[7:0]/
A[7:0]
D[7:0]/
A[7:0]/
A[15:8]
D[7:0] D[7:0]
PORT0
7:4
– – – –
3
–
ALE2
–
ALE2
2 ALE1 ALE1 ALE1 ALE1
1RE RE RE RE
0WE WE WE WE
Table 27-7. Pin-out SDRAM.
PORT PIN SDRAM
3PORT
4BIT
SDRAM
4PORT
4BIT
SDRAM
4PORT
8BIT
PORT3
7:4
–
CS[3:0] CS[3:0]
3:0
A[11:8]
PORT2 7:0 A[7:0] A[7:0] A[7:0]
PORT1
7:4 A[11:8] A[11:8] D[7:4]
3:0 D[3:0] D[3:0] D[3:0]
PORT0
7 CLK CLK CLK
6 CKE CKE CKE
5 BA1 BA1 BA1
4 BA0 BA0 BA0
3DQM
DQM DQM
2RAS RAS RAS
1CAS CAS CAS
0WE WE WE