AT29C040 ATMEL Corporation, AT29C040 Datasheet - Page 7

• Manufacturer Part Number: AT29C040
• Description: 4-Megabit 512K x 8 5-volt Only 256-Byte Sector CMOS Flash Memory
• Manufacturer: ATMEL Corporation

Program Cycle Waveforms
Program Cycle Characteristics
Notes: 1. A8 through A18 must specify the sector address
Symbol
t
t
t
t
t
t
t
t
WC
AS
AH
DS
DH
WP
BLC
WPH
2. OE must be high when WE and CE are both low.
during each high to low transition of WE (or CE).
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
(1, 2, 3)
Min
100
10
50
50
10
90
3. All bytes that are not loaded within the sector being
programmed will be indeterminate.
Max
150
10
AT29C040A
Units
ms
ns
ns
ns
ns
ns
ns
s
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