at29c040a ATMEL Corporation, at29c040a Datasheet - Page 10

• Manufacturer Part Number: at29c040a
• Description: At29c040a 4-megabit 512k X 8 5-volt Only 256-byte Sector Flash Memory
• Manufacturer: ATMEL Corporation

16. Program Cycle Characteristics
17. Program Cycle Waveforms
Notes:
10
Symbol
t
t
t
t
t
t
t
t
WC
AS
AH
DS
DH
WP
BLC
WPH
1. A8 through A18 must specify the sector address during each high to low transition of WE (or CE).
2. OE must be high only when WE and CE are both low.
3. All bytes that are not loaded within the sector being programmed will be indeterminate.
AT29C040A
Parameter
Write Cycle Time
Address Setup Time
Address Hold Time
Data Setup 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
Max
150
10
0333K–FLASH–2/05
Units
ms
ns
ns
ns
ns
ns
µs
ns