at91sam9263 ATMEL Corporation, at91sam9263 Datasheet - Page 1011

• Manufacturer Part Number: at91sam9263
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

46.7.4
46.7.4.1
Table 46-24. SDRAMC Clock Signal
Table 46-25. SDRAMC Signals
6249D–ATARM–20-Dec-07
Symbol
1/(t
Symbol
SDRAMC
SDRAMC
SDRAMC
SDRAMC
SDRAMC
SDRAMC
SDRAMC
SDRAMC
SDRAMC
SDRAMC
SDRAMC
SDRAMC
SDRAMC
SDRAMC
SDRAMC
SDRAMC
SDRAMC
CPSDCK
)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
SDRAMC Signals
External Bus Interface 0 Timings
Parameter
SDCKE High before SDCK Rising Edge
SDCKE Low after SDCK Rising Edge
SDCKE Low before SDCK Rising Edge
SDCKE High after SDCK Rising Edge
SDCS Low before SDCK Rising Edge
SDCS High after SDCK Rising Edge
RAS Low before SDCK Rising Edge
RAS High after SDCK Rising Edge
SDA10 Change before SDCK Rising Edge
SDA10 Change after SDCK Rising Edge
Address Change before SDCK Rising Edge
Address Change after SDCK Rising Edge
Bank Change before SDCK Rising Edge
Bank Change after SDCK Rising Edge
CAS Low before SDCK Rising Edge
CAS High after SDCK Rising Edge
DQM Change before SDCK Rising Edge
Parameter
SDRAM Controller Clock Frequency
These timings are given for worst case process, T° = 85°C and 10 pF load on SDCK.
In each column two timings are given :
Second ones are given for
• First column for
• Second column for
• First ones are given for
VDDCORE supply
VDDIOM supply
V
VDDIOM
V
VDDIOM
V
V
in 1.8V supply range (1.65V to 1.95V) and 30 pF load capacitance.
VDDCORE
VDDCORE
in 3.3V supply range (3.0V to 3.6V) and 50 pF load capacitance.
1.08V
=1.08V.
=1.2V.
4.4
4.6
4.4
4.6
4.4
4.7
4.0
4.7
3.8
4.6
2.9
4.3
2.8
4.6
4.7
4.5
2.8
1.8V Supply
1.8V
AT91SAM9263 Preliminary
100
1.2V
4.6
4.6
4.6
4.6
4.5
4.7
4.3
4.7
4.2
4.6
3.3
4.3
3.2
4.6
4.8
4.5
3.2
Min
Max
1.08V
3.1
5.2
2.7
5.0
2.7
5.1
2.3
5.1
2.5
5.1
2.2
4.7
1.1
5.0
3.0
4.9
1.1
3.3V Supply
100
3.3V
1.2V
3.5
5.2
3.1
5.0
3.1
5.1
2.9
5.1
3.1
5.1
1.8
4.7
1.7
5.0
3.4
4.9
1.7
Units
MHz
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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