AT29BV020-15TU 데이터 시트보기 (PDF) - Atmel Corporation
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AT29BV020-15TU Datasheet PDF : 16 Pages
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16. 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
17. Software Protected Program Waveform
Min
Max
Units
20
ms
10
ns
100
ns
100
ns
10
ns
200
ns
150
µs
200
ns
Notes:
1. OE must be high when WE and CE are both low.
2. 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.
3. Data in bytes not loaded within a sector being programmed may be altered by the program operation; therefore, all bytes
within a sector must be loaded.
18. 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.
10 AT29BV020
0402F–FLASH–9/08
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