AT29LV040A Datasheet, PDF (7/10 Pages) ATMEL Corporation – 4 Megabit 512K x 8 3-volt Only 256 Byte Sector CMOS Flash Memory

Program Cycle Characteristics
Symbol
Parameter
Min
tWC
Write Cycle Time
tAS
Address Set-up Time
10
tAH
Address Hold Time
100
tDS
Data Set-up Time
100
tDH
Data Hold Time
10
tWP
Write Pulse Width
200
tBLC
Byte Load Cycle Time
tWPH
Write Pulse Width High
200
Software Protected Program Waveform
AT29LV040A
Max
Units
20
ms
ns
ns
ns
ns
ns
150
µs
ns
Notes: 1. OE must be high when WE and CE are both low.
2. A8 through A18 must specify the sector address
during each high to low transition of WE (or CE)
after the software code has been entered.
Programming Algorithm ⁽¹⁾
LOAD DATA AA
TO
ADDRESS 5555
LOAD DATA 55
TO
ADDRESS 2AAA
LOAD DATA A0
TO
ADDRESS 5555
WRITES ENABLED
LOAD DATA
TO
(3)
SECTOR (256 BYTES)
ENTER DATA
(2)
PROTECT STATE
3. All bytes that are not loaded within the sector being
programmed will be indeterminate.
Notes for software program code:
1. Data Format: I/O7 - I/O0 (Hex);
Address Format: A14 - A0 (Hex).
2. Data Protect state will be re-activated at end of program cycle.
3. 256-bytes of data MUST BE loaded.
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