Rainbow Electronics AT91CAP9S250A - Manual (Page 971)

971
6264A–CAP–21-May-07
AT91CAP9S500A/AT91CAP9S250A
Figure 47-3. SMC Timings - NCS Controlled Read and Write
SMC
25
NWE low before NCS high
(ncs wr setup - nwe setup + ncs
pulse)* t
CPMCK
+ TBD
(ncs wr setup - nwe setup +
ncs pulse)* t
CPMCK
+ TBD
ns
SMC
26
NCS High to Data Out, NBS0/A0,
NBS1, NBS2/A1, NBS3, A2 - A25,
change
ncs wr hold * t
CPMCK
+ TBD ncs wr hold * t
CPMCK
+ TBD ns
SMC
27
NCS High to NWE Inactive
(ncs wr hold - nwe hold )*
t
CPMCK
+ TBD
(ncs wr hold - nwe hold )*
t
CPMCK
+ TBD
ns
Table 47-25. SMC Write NCS Controlled (WRITE_MODE = 0)
Symbol Parameter
Min
Units 1.8V Supply 3.3V Supply
NRD
NCS
D0 - D15
NWE
NCS Controlled READ
with NO HOLD
NCS Controlled READ
with HOLD
NCS Controlled WRITE
SMC22 SMC26 SMC10 SMC11
SMC12
SMC9 SMC8
SMC14 SMC14 SMC23
SMC27
SMC26
A0/A1/NBS[3:0]/A2-A25
SMC24
SMC25
SMC12
SMC13 SMC13