AT49F020 데이터 시트보기 (PDF) - Atmel Corporation

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AT49F020

2-Megabit (256K x 8) 5-volt Only Flash Memory

Atmel Corporation 

Data Polling Characteristics(1)

Symbol Parameter

tDH

Data Hold Time

tOEH

OE Hold Time

tOE

OE to Output Delay(2)

tWR

Write Recovery Time

Notes: 1. These parameters are characterized and not 100% tested.

2. See tOE spec in AC Read Characteristics.

Data Polling Waveforms

Min

Typ

Max

Units

10

ns

10

ns

ns

0

ns

Toggle Bit Characteristics(1)

Symbol Parameter

tDH

Data Hold Time

tOEH

OE Hold Time

tOE

OE to Output Delay(2)

tOEHP

OE High Pulse

tWR

Write Recovery Time

Notes: 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

150

ns

0

ns

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.

8

AT49F020

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