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AT49F040A Datasheet(PDF) 10 Page - ATMEL Corporation

Part No. AT49F040A
Description  4-megabit (512K x 8) 5-volt Only Flash Memory
Download  16 Pages
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Maker  ATMEL [ATMEL Corporation]
Homepage  http://www.atmel.com
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AT49F040A Datasheet(HTML) 10 Page - ATMEL Corporation

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10
AT49F040A
3359B–FLASH–10/04
Program Cycle Waveforms
Sector or Chip Erase Cycle Waveforms
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 definitions.)
3. For chip erase, the data should be 10H, and for sector erase, the data should be 30H.
Program Cycle Characteristics
Symbol
Parameter
Min
Typ
Max
Units
t
BP
Byte Programming Time
20
40
µs
t
AS
Address Set-up Time
0
ns
tAH
Address Hold Time
25
ns
t
DS
Data Set-up Time
20
ns
t
DH
Data Hold Time
0
ns
tWP
Write Pulse Width
20
ns
t
WPH
Write Pulse Width High
20
ns
t
EC
Erase Cycle Time
6
7
seconds
8
8


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