Datasheet

DRAFT
SAM3X / SAM3A [DATASHEET]
Atmel-11057C-ATARM-SAM3X-SAM3A-Datasheet_23-Mar-15
1422
45.10.6 SMC Timings
SMC timings are given for the following domains:
 1.8V domain: V
DDIO
from 1.65V to 1.95V, maximum external capacitor = 30 pF
 3.3V domain: V
DDIO
from 3.0V to 3.6V, maximum external capacitor = 50 pF
Timings are given assuming a capacitance load on data, control and address pads.
In the following tables t
CPMCK
is MCK period.
45.10.6.1 Read Timings
Table 45-50. SMC Read Signals - NRD Controlled (READ_MODE = 1)
Symbol
Parameter Min Max
UnitVDDIO supply 1.8V Domain 3.3V Domain 1.8V Domain 3.3V Domain
NO HOLD SETTINGS (NRD_HOLD = 0)
SMC
1
Data Setup before NRD High 22.5 18 ns
SMC
2
Data Hold after NRD High 0 0 ns
HOLD SETTINGS (NRD_HOLD ≠ 0)
SMC
3
Data Setup before NRD High 20.3 16 ns
SMC
4
Data Hold after NRD High 00 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
(NRD_SETUP + NRD_PULSE) ×
t
CPMCK
- 20
(NRD_SETUP + NRD_PULSE) ×
t
CPMCK
- 20
ns
SMC
6
NCS low before NRD High
(NRD_SETUP + NRD_PULSE -
NCS_RD_SETUP) × t
CPMCK
- 20
(NRD_SETUP + NRD_PULSE -
NCS_RD_SETUP) × t
CPMCK
- 20
ns
SMC
7
NRD Pulse Width nrd pulse × t
CPMCK
- 3 nrd pulse × t
CPMCK
- 3 ns
Table 45-51. SMC Read Signals - NCS Controlled (READ_MODE = 0)
Symbol
Parameter Min Max
UnitVDDIO supply 1.8V Domain 3.3V Domain 1.8V Domain 3.3V Domain
NO HOLD SETTINGS (NCS_RD_HOLD = 0)
SMC
8
Data Setup before NCS High 26.3 24.6 ns
SMC
9
Data Hold after NCS High 0 0 ns
HOLD SETTINGS (NCS_RD_HOLD ≠ 0)
SMC
10
Data Setup before NCS High 24.1 22.4 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
(NCS_RD_SETUP +
NCS_RD_PULSE) × t
CPMCK
- 3
(NCS_RD_SETUP +
NCS_RD_PULSE) × t
CPMCK
- 3
ns
SMC
13
NRD low before NCS High
(NCS_RD_SETUP +
NCS_RD_PULSE -
NRD_SETUP) × t
CPMCK
+ 0.7
(NCS_RD_SETUP +
NCS_RD_PULSE -
NRD_SETUP) × t
CPMCK
+ 0.6
ns
SMC
14
NCS Pulse Width
NCS_RD_PULSE length ×
t
CPMCK
- 6
NCS_RD_PULSE length ×
t
CPMCK
- 6
ns