AT49F040A 查看數據表（PDF） - Atmel Corporation
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AT49F040A Datasheet PDF : 17 Pages
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19. Program Cycle Characteristics
Symbol
tBP
tAS
tAH
tDS
tDH
tWP
tWPH
tEC
Parameter
Byte Programming Time
Address Set-up Time
Address Hold Time
Data Set-up Time
Data Hold Time
Write Pulse Width
Write Pulse Width High
Chip Erase Cycle Time
20. Program Cycle Waveforms
AT49F040A
Min
Typ
Max
Units
20
40
µs
0
ns
25
ns
20
ns
0
ns
20
ns
20
ns
12
seconds
8
21. Sector or Chip Erase Cycle Waveforms
8
Notes:
1. OE must be high only when WE and CE are both low.
2. For chip erase, the address should be 555. For sector erase, the address depends on what sector is to be erased.
(See note 4 under “Command Definition Table” on page 6.)
3. For chip erase, the data should be 10H, and for sector erase, the data should be 30H.
11
3359D–FLASH–3/05
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