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6174B–ATARM–07-Nov-05
AT91FR40162S Preliminary
10.10 Memory Access Waveforms
show examples of the two alternative protocols for external
memory read access.
Figure 10-17. Standard Read Protocol without t
DF
Read Mem 1
Write Mem 1
Read Mem 1
Read Mem 2
Write Mem 2
Read Mem 2
Chip Select
Change Wait
A0 - A23
NRD
NWE
NCS1
NCS2
D0 - D15 (Mem 1)
D0 - D15 (Mem 2)
D0 - D15 (AT91)
MCK
t
WHDX
t
WHDX