AT29C257-12 ATMEL Corporation, AT29C257-12 Datasheet - Page 7

• Manufacturer Part Number: AT29C257-12
• Description: 256K 32K x 8 5-volt Only CMOS Flash Memory
• Manufacturer: ATMEL Corporation

Notes: 1. A6 through A14 must specify the page address
Program Cycle Characteristics
Program Cycle Waveforms
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
50
35
90
0
0
3. All bytes that are not loaded within the page being
programmed will be indeterminate.
Max
150
10
AT29C257
Units
ms
ns
ns
ns
ns
ns
ns
s
4-111