Rainbow Electronics AT91CAP9S250A - Manual (Page 195)

195
6264A–CAP–21-May-07
AT91CAP9S500A/AT91CAP9S250A
Figure 22-27. Read Access with NWAIT Assertion in Frozen Mode (EXNW_MODE = 10)
EXNW_MODE = 10 (Frozen)
READ_MODE = 0 (NCS_controlled)
NRD_PULSE = 2, NRD_HOLD = 6
NCS_RD_PULSE =5, NCS_RD_HOLD =3
A [25:2]
MCK
NCS
NRD
1 0
4 3
4 3
2
5 5 5
2 2 0
2 1 0
2 1 0
1
Read cycle
Assertion is ignored
NWAIT
internally synchronized
NWAIT signal
FROZEN STATE
NBS0, NBS1,
NBS2, NBS3,
A0,A1