AT91SAM9G46B-CU 查看數據表（PDF） - Atmel Corporation
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AT91SAM9G46B-CU Datasheet PDF : 1277 Pages
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48.13.2.2 Read Timings
Table 48-29. SMC Read Signals - NRD Controlled (READ_MODE = 1)
Min
Symbol Parameter
1.8V VDDIOM Supply
3.3V VDDIOM Supply
Unit
NO HOLD SETTINGS (nrd hold = 0)
SMC1
SMC2
Data Setup before NRD High
Data Hold after NRD High
12.0
0
HOLD SETTINGS (nrd hold ≠ 0)
11.2
ns
0
ns
SMC3 Data Setup before NRD High
8.7
8.2
ns
SMC4 Data Hold after NRD High
0
0
ns
HOLD or NO HOLD SETTINGS (nrd hold ≠ 0, nrd hold = 0)
SMC5
NBS0/A0, NBS1, NBS2/A1, NBS3, A2–A25 (nrd setup + nrd pulse) × tCPMCK (nrd setup + nrd pulse) × tCPMCK
Valid before NRD High
- 15.4
- 15.5
ns
SMC6
SMC7
NCS low before NRD High
NRD Pulse Width
(nrd setup + nrd pulse - ncs rd
setup) × tCPMCK - 14.7
(nrd setup + nrd pulse - ncs rd
setup) × tCPMCK - 14.7
ns
nrd pulse × tCPMCK - 0.5
nrd pulse × tCPMCK - 0.2
ns
Table 48-30. SMC Read Signals - NCS Controlled (READ_MODE = 0)
Min
Symbol Parameter
1.8V VDDIOM Supply
3.3V VDDIOM Supply
Unit
NO HOLD SETTINGS (ncs rd hold = 0)
SMC8
SMC9
Data Setup before NCS High
Data Hold after NCS High
15.0
0
HOLD SETTINGS (ncs rd hold ≠ 0)
14.1
ns
0
ns
SMC10 Data Setup before NCS High
11.4
10.9
ns
SMC11 Data Hold after NCS High
0
0
ns
HOLD or NO HOLD SETTINGS (ncs rd hold ≠ 0, ncs rd hold = 0)
SMC12
NBS0/A0, NBS1, NBS2/A1, NBS3, A2–A25 (ncs rd setup + ncs rd pulse) ×
valid before NCS High
tCPMCK - 3.7
(ncs rd setup + ncs rd pulse) ×
tCPMCK - 4.4
ns
SMC13 NRD low before NCS High
(ncs rd setup + ncs rd pulse -
nrd setup) × tCPMCK - 0.8
(ncs rd setup + ncs rd pulse -
nrd setup) × tCPMCK - 1.1
ns
SMC14 NCS Pulse Width
ncs rd pulse length × tCPMCK -
0.5
ncs rd pulse length × tCPMCK -
0.2
ns
1224 SAM9G46 Series [DATASHEET]
Atmel-11028G-ATARM-SAM9G46-Datasheet_08-Dec-15
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