Rainbow Electronics AT91CAP9S250A - Manual (Page 186)

186
6264A–CAP–21-May-07
AT91CAP9S500A/AT91CAP9S250A
Figure 22-17. Early Read Wait State: Write with No Hold Followed by Read with No Setup
Figure 22-18. Early Read Wait State: NCS Controlled Write with No Hold Followed by a Read with No NCS Setup
write cycle Early Read
wait state
MCK
NRD
NWE
read cycle
no setup
no hold
D[31:0]
NBS0, NBS1,
NBS2, NBS3,
A0, A1
A[25:2]
write cycle
(WRITE_MODE = 0)
Early Read
wait state
MCK
NRD
NCS
read cycle
(READ_MODE = 0 or READ_MODE = 1)
no setup no hold
D[31:0]
NBS0, NBS1,
NBS2, NBS3,
A0,A1
A[25:2]