SAM9G15_14 Datasheet, PDF (1175/1215 Pages) ATMEL Corporation – ARM-based Embedded MPU

45.16.2.3 Write Timings
Table 45-35. SMC Write Signals - NWE Controlled (WRITE_MODE = 1)
Min
Max
Symbol
Parameter
1.8V Supply
3.3V Supply
1.8 V
3.3 V
Supply Supply Unit
HOLD or NO HOLD SETTINGS (nwe hold ≠ 0, nwe hold = 0)
SMC₁₅ Data Out Valid before NWE High
nwe pulse × t_CPMCK - 3.9 nwe pulse × t_CPMCK - 3.9
ns
SMC₁₆ NWE Pulse Width
nwe pulse × t_CPMCK - 3.2 nwe pulse × t_CPMCK - 3.2
ns
SMC₁₇
NBS0/A0 NBS1, NBS2/A1, NBS3,
A2–A25 valid before NWE low
nwe setup × t_CPMCK - 4.2
nwe setup × t_CPMCK - 4.0
ns
(nwe setup - ncs rd setup (nwe setup - ncs rd setup
SMC₁₈ NCS low before NWE high
+ nwe pulse) × t_CPMCK -
+ nwe pulse) × t_CPMCK -
ns
4.2
4.2
HOLD SETTINGS (nwe hold ≠ 0)
NWE High to Data OUT, NBS0/A0
SMC₁₉ NBS1, NBS2/A1, NBS3, A2–A25
nwe hold × t_CPMCK - 4.8
nwe hold × t_CPMCK - 4.0
ns
change
SMC₂₀ 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
NO HOLD SETTINGS (nwe hold = 0)
NWE High to Data OUT, NBS0/A0
SMC₂₁
NBS1, NBS2/A1, NBS3, A2 - A25,
NCS change ⁽¹⁾
1.9
1.5
ns
SMC_21b
Min Period/Max Frequency with
No Hold settings
11.4
9.7
87
103
ns/
MHz
Note: 1. hold length = total cycle duration - setup duration - pulse duration. “hold length” is for “ncs wr hold length” or “NWE
hold length”.
Table 45-36. SMC Write NCS Controlled (WRITE_MODE = 0)
Min
Symbol
Parameter
1.8V Supply
3.3V Supply
SMC₂₂
SMC₂₃
SMC₂₄
Data Out Valid before NCS High
NCS Pulse Width
NBS0/A0 NBS1, NBS2/A1, NBS3, A2–A25
valid before NCS low
ncs wr pulse × t_CPMCK - 2.9
ncs wr pulse × t_CPMCK - 4.0
ncs wr setup × t_CPMCK - 3.6
ncs wr pulse × t_CPMCK - 3.0
ncs wr pulse × t_CPMCK - 4.0
ncs wr setup × t_CPMCK - 3.5
SMC₂₅
SMC₂₆
NWE low before NCS high
NCS High to Data Out, NBS0/A0, NBS1,
NBS2/A1, NBS3, A2–A25, change
(ncs wr setup - nwe setup + ncs
pulse) × t_CPMCK - 4.6
ncs wr hold × t_CPMCK - 5.4
(ncs wr setup - nwe setup +
ncs pulse) × t_CPMCK - 4.6
ncs wr hold × t_CPMCK - 4.5
SMC₂₇ NCS High to NWE Inactive
(ncs wr hold - nwe hold) × t_CPMCK
- 4.2
(ncs wr hold - nwe hold) ×
t_CPMCK - 3.8
Unit
ns
ns
ns
ns
ns
ns
SAM9G15 [DATASHEET]
11152F–ATARM–10-Mar-2014
1175