Техническая Спецификация для Atmel Evaluation Kit AT91SAM9G25-EK AT91SAM9G25-EK
Модели
AT91SAM9G25-EK
1058
SAM9G25 [DATASHEET]
11032C–ATARM–25-Jan-13
46.15.2.3Write Timings
Table 46-31. SMC Read Signals - NCS Controlled (READ_MODE= 0)
Symbol
Parameter
Min
Units
VDDIOM supply
1.8V
3.3V
NO HOLD SETTINGS (ncs rd hold = 0)
SMC
8
Data Setup before NCS High
26.9
25.0
ns
SMC
9
Data Hold after NCS High
0
0
ns
HOLD SETTINGS (ncs rd hold
≠ 0)
SMC
10
Data Setup before NCS High
12.3
10.4
ns
SMC
11
Data Hold after NCS High
0
0
ns
HOLD or NO HOLD SETTINGS (ncs rd hold
≠ 0, ncs rd hold = 0)
SMC
12
NBS0/A0, NBS1, NBS2/A1, NBS3, A2 -
A25 valid before NCS High
A25 valid before NCS High
(ncs rd setup + ncs rd pulse)*
t
CPMCK
- 18.4
(ncs rd setup + ncs rd
pulse)* t
CPMCK
- 18.4
ns
SMC
13
NRD low before NCS High
(ncs rd setup + ncs rd pulse - nrd
setup)* t
CPMCK
- 2.0
(ncs rd setup + ncs rd pulse
- nrd setup)* t
CPMCK
- 2.1
ns
SMC
14
NCS Pulse Width
ncs rd pulse length * t
CPMCK
- 4.0
ncs rd pulse length * t
CPMCK
- 4.0
ns
Table 46-32. SMC Write Signals - NWE Controlled (WRITE_MODE = 1)
Symbol
Parameter
Min
Max
Units
1.8V Supply
3.3V Supply
1.8 V
Supply
3.3 V
Supply
HOLD or NO HOLD SETTINGS (nwe hold
≠ 0, nwe hold = 0)
SMC
15
Data Out Valid before
NWE High
NWE High
nwe pulse * t
CPMCK
- 3.9
nwe pulse * t
CPMCK
- 3.9
ns
SMC
16
NWE Pulse Width
nwe pulse * t
CPMCK
- 3.2
nwe pulse * t
CPMCK
- 3.2
ns
SMC
17
NBS0/A0 NBS1, NBS2/A1,
NBS3, A2 - A25 valid
before NWE low
NBS3, A2 - A25 valid
before NWE low
nwe setup * t
CPMCK
- 4.2
nwe setup * t
CPMCK
- 4.0
ns
SMC
18
NCS low before NWE high
(nwe setup - ncs rd setup
+ nwe pulse) * t
CPMCK
- 4.2
(nwe setup - ncs rd setup
+ nwe pulse) * t
CPMCK
- 4.2
ns
HOLD SETTINGS (nwe hold
≠ 0)
SMC
19
NWE High to Data OUT,
NBS0/A0 NBS1, NBS2/A1,
NBS3, A2 - A25 change
NBS0/A0 NBS1, NBS2/A1,
NBS3, A2 - A25 change
nwe hold * t
CPMCK
- 4.8
nwe hold * t
CPMCK
- 4.0
ns
SMC
20
NWE High to NCS Inactive
(1)
(nwe hold - ncs wr hold)*
t
CPMCK
- 4.0
(nwe hold - ncs wr hold)*
t
CPMCK
- 3.5
ns