Datasheet

SAM9G20
DS60001516A-page 752  2017 Microchip Technology Inc.
Figure 40-4: SMC Timings - NCS Controlled Read and Write
Table 40-30: SMC Write NCS Controlled (WRITE_MODE = 0)
Symbol Parameter
Min
Unit1.8V VDDIOM Supply 3.3V VDDIOM Supply
SMC
22
Data Out Valid before NCS High ncs wr pulse * t
CPMCK
- 0.8 ncs wr pulse * t
CPMCK
- 0.7 ns
SMC
23
NCS Pulse Width ncs wr pulse * t
CPMCK
+ 0.1 ncs wr pulse * t
CPMCK
- 0.1 ns
SMC
24
NBS0/A0 NBS1, NBS2/A1, NBS3,
A2–A25 valid before NCS low
ncs wr setup * t
CPMCK
- 0.6 ncs wr setup * t
CPMCK
- 0.6 ns
SMC
25
NWE low before NCS high
(ncs wr setup - nwe setup + ncs
pulse) * t
CPMCK
- 0.4
(ncs wr setup - nwe setup + ncs
pulse) * t
CPMCK
- 0.3
ns
SMC
26
NCS High to Data Out, NBS0/A0,
NBS1, NBS2/A1, NBS3, A2–A25,
change
ncs wr hold * t
CPMCK
- 0.2 ncs wr hold * t
CPMCK
- 0.2 ns
SMC
27
NCS High to NWE Inactive
(ncs wr hold - nwe hold) * t
CPMCK
-
0.2
(ncs wr hold - nwe hold) * t
CPMCK
-
0.2
ns
NRD
NCS
D0–D15
NWE
NCS Controlled READ
with NO HOLD
NCS Controlled READ
with HOLD
NCS Controlled WRITE
SMC22 SMC26SMC10
SMC11
SMC12
SMC9
SMC8
SMC14 SMC14 SMC23
SMC27
SMC26
A
0/A1/NBS[3:0]/A2–A25
SMC24
SMC25
SMC12
SMC13 SMC13