Datasheet

SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
1458
47.11.5.2 Write Timings
Notes: 1. Hold length = total cycle duration - setup duration - pulse duration. “hold length” is for “NCS wr hold length” or “NWE hold
length”.
2. 1.8V domain: V
VDDIO
from 1.65V to 1.95V, maximum external capacitor = 30 pF.
3. 3.3V domain: V
VDDIO
from 2.85V to 3.6V, maximum external capacitor = 50 pF.
Table 47-60. SMC Write Signals - NWE Controlled (WRITE_MODE = 1)
Symbol Parameter
Min Max
Units1.8V
(2)
3.3V
(3)
1.8V
(2)
3.3V
(3)
HOLD or NO HOLD SETTINGS (NWE hold ≠ 0, NWE hold = 0)
SMC
15
Data Out Valid before NWE
High
NWE pulse * t
CP_MCK
- 6.2
NWE pulse *
t
CP_MCK
- 5.9
——ns
SMC
16
NWE Pulse Width
NWE pulse *
t
CP_MCK
- 7.0
NWE pulse * t
CP_MCK
- 6.1
——ns
SMC
17
A0 - A22 valid before NWE
low
NWE setup * t
CP_MCK
- 6.6
NWE setup * t
CP_MCK
- 6.2
——ns
SMC
18
NCS low before NWE high
(NWE setup - NCS RD setup + NWE
pulse) * t
CP_MCK
- 5.9
(NWE setup - NCS RD setup
+ NWE pulse) * t
CP_MCK
- 5.5
——ns
HOLD SETTINGS (NWE hold ≠ 0)
SMC
19
NWE High to Data OUT,
NBS0/A0 NBS1, NBS2/A1,
NBS3, A2 - A25 change
NWE hold *
t
CP_MCK
- 9.4
NWE hold * t
CP_MCK
- 7.6
——ns
SMC
20
NWE High to NCS Inactive
(1)
(NWE hold - NCS wr hold )* t
CP_MCK
- 6.0
(NWE hold - NCS wr hold)*
t
CP_MCK
- 5.6
——ns
NO HOLD SETTINGS (NWE hold = 0)
SMC
21
NWE High to Data OUT,
NBS0/A0 NBS1, NBS2/A1,
NBS3, A2 - A25, NCS
change
(1)
3.3 3.2 — — ns