AT49F040A(2003) 查看數據表（PDF） - Atmel Corporation
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AT49F040A Datasheet PDF : 17 Pages
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AT49F040A
Data Polling Characteristics(1)
Symbol Parameter
tDH
tOEH
tOE
tWR
Notes:
Data Hold Time
OE Hold Time
OE to Output Delay(2)
Write Recovery Time
1. These parameters are characterized and not 100% tested.
2. See tOE spec in AC Read Characteristics.
Data Polling Waveforms
WE
CE
OE
tDH
I/O7
tOEH
tOE
HIGH Z
A0-A18
An
An
An
Min
Typ
Max
10
10
0
tWR
An
An
Units
ns
ns
ns
ns
Toggle Bit Characteristics(1)
Symbol Parameter
tDH
tOEH
tOE
tOEHP
tWR
Notes:
Data Hold Time
OE Hold Time
OE to Output Delay(2)
OE High Pulse
Write Recovery Time
1. These parameters are characterized and not 100% tested.
2. See tOE spec in AC Read Characteristics.
Toggle Bit Waveforms(1)(2)(3)
Min
Typ
Max
Units
10
ns
10
ns
ns
50
ns
0
ns
WE
Notes:
CE
OE
tOEH
tOEHP
tDH tOE
HIGH Z
I/O6
tWR
1. Toggling either OE or CE or both OE and CE will operate toggle bit. The tOEHP specification must be met by the toggling
input(s).
2. Beginning and ending state of I/O6 will vary.
3. Any address location may be used but the address should not vary.
11
3359A–FLASH–6/03
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