42
1745D–ATARM–04-Nov-05
AT91M55800A
Figure 11-20. 1 Wait State, 16-bit Bus Width, Word Transfer
ADDR
ADDR+1
B
2
B
1
B
4
B
3
X X B
2
B
1
B
4
B
3
B
2
B
1
1 Wait State 1 Wait State
MCK
A1 - A23
NCS
NRD
D0 - D15
Internal Bus
WRITE ACCESS
READ ACCESS
NRD
D0 - D15
· Standard Protocol
· Early Protocol
B
4
B
3
NWE
D0 - D15
B
2
B
1
B
4
B
3
NLB
NUB
B
2
B
1
· Byte Write/
Byte Select Option