AT29LV020-10JC 데이터 시트보기 (PDF) - Atmel Corporation

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AT29LV020-10JC

2-megabit (256K x 8) 3-volt Only Flash Memory

Atmel Corporation 

Program Cycle Characteristics

Symbol

tWC

tAS

tAH

tDS

tDH

tWP

tBLC

tWPH

Parameter

Write Cycle Time

Address Set-up Time

Address Hold Time

Data Set-up Time

Data Hold Time

Write Pulse Width

Byte Load Cycle Time

Write Pulse Width High

Software Protected Program Waveform

AT29LV020

Min

Max

Units

20

ms

10

ns

100

ns

100

ns

10

ns

200

ns

150

µs

200

ns

Notes:

1. A8 through A17 must specify the sector address during each high to low transition of WE (or CE) after the software code has

been entered.

2. OE must be high when WE and CE are both low.

3. All words that are not loaded within the sector being programmed will be indeterminate.

Programming Algorithm(1)

LOAD DATA AA

TO

ADDRESS 5555

LOAD DATA 55

TO

ADDRESS 2AAA

LOAD DATA A0

TO

ADDRESS 5555

WRITES ENABLED

LOAD DATA

TO

SECTOR (256 BYTES)(3)

ENTER DATA

PROTECT STATE(2)

Notes:

1. Data Format: I/O7 - I/O0 (Hex);

Address Format: A14 - A0 (Hex).

2. Data Protect state will be re-activated at end of

program cycle.

3. 256 bytes of data MUST BE loaded.

9

0565C–FLASH–05/02

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