Atmel Evaluation Kit AT91SAM9X25-EK AT91SAM9X25-EK Data Sheet
Product codes
AT91SAM9X25-EK
1106
SAM9X25 [DATASHEET]
11054E–ATARM–10-Mar-2014
46.16.2.2 Read Timings
Table 46-32. SMC Read Signals - NRD Controlled (READ_MODE = 1)
Symbol
Parameter
Min
Unit
VDDIOM supply 1.8V
VDDIOM supply 3.3V
NO HOLD SETTINGS (nrd hold = 0)
SMC
1
Data Setup before NRD High
13.6
11.7
ns
SMC
2
Data Hold after NRD High
0
0
ns
HOLD SETTINGS (nrd hold
≠ 0)
SMC
3
Data Setup before NRD High
10.9
9.0
ns
SMC
4
Data Hold after NRD High
0
0
ns
HOLD or NO HOLD SETTINGS (nrd hold
≠ 0, nrd hold =0)
SMC
5
NBS0/A0, NBS1, NBS2/A1, NBS3, A2–A25
valid before NRD High
valid before NRD High
(nrd setup + nrd pulse)
× t
CPMCK
- 4.7
(nrd setup + nrd pulse)
× t
CPMCK
- 4.7
ns
SMC
6
NCS low before NRD High
(nrd setup + nrd pulse - ncs rd
setup)
× t
CPMCK
- 4.3
(nrd setup + nrd pulse - ncs rd
setup)
× t
CPMCK
- 4.4
ns
SMC
7
NRD Pulse Width
nrd pulse
× t
CPMCK
- 3.2
nrd pulse
× t
CPMCK
- 3.3
ns
Table 46-33. SMC Read Signals - NCS Controlled (READ_MODE = 0)
Symbol
Parameter
Min
Unit
VDDIOM supply 1.8V
VDDIOM supply 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
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