ATMEGA162_14 Datasheet, PDF (273/324 Pages) ATMEL Corporation – High-performance, Low-power AVR

ATmega162/V
Figure 118. External Memory Timing (SRWn1 = 0, SRWn0 = 0
T1
T2
T3
System Clock (CLK_CPU)
1
ALE
4
7
A15:8 Prev. addr.
DA7:0 Prev. data
2 3a 13
Address XX
Address
15
Data
6
16
WR
DA7:0 (XMBK = 0)
RD
3b
Address
5
8
9
Data
10
12
T4
14
11
Figure 119. External Memory Timing (SRWn1 = 0, SRWn0 = 1)
T1
T2
T3
T4
System Clock (CLK_CPU)
1
ALE
4
7
A15:8 Prev. addr.
DA7:0 Prev. data
Address
2 3a 13
Address XX
15
Data
6
16
WR
DA7:0 (XMBK = 0)
RD
3b
Address
5
10
8
9
Data
12
T5
14
11
2513L–AVR–03/2013
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