AT49BV020 查看數據表（PDF） - Atmel Corporation
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AT49BV020 Datasheet PDF : 10 Pages
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AT49BV020
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-A17
An
An
An
Min
Typ
Max
Units
0
ns
10
ns
ns
0
ns
tWR
An
An
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)
WE
Min
Typ
Max
Units
0
ns
10
ns
ns
150
ns
0
ns
CE
tOEH
OE
tOEHP
tDH
I/O6
tOE
tWR
HIGH Z
Notes:
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.
7
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