at29lv040a ATMEL Corporation, at29lv040a Datasheet - Page 10

• Manufacturer Part Number: at29lv040a
• Description: 4-megabit 512k X 8 3-volt Only 256-byte Sector Flash Memory
• Manufacturer: ATMEL Corporation

16. Program Cycle Characteristics
17. Software Protected Program Waveform
Notes:
18. Programming Algorithm
10
Symbol
t
t
t
t
t
t
t
t
WC
AS
AH
DS
DH
WP
BLC
WPH
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
3. All words that are not loaded within the sector being programmed will be indeterminate.
AT29LV040A
SECTOR (256 BYTES)
has been entered.
ADDRESS 2AAA
LOAD DATA AA
ADDRESS 5555
ADDRESS 5555
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
LOAD DATA 55
LOAD DATA A0
LOAD DATA
TO
TO
TO
TO
(3)
WRITES ENABLED
ENTER DATA
PROTECT STATE
(2)
(1)
Notes:
1. Data Format: I/O7 - I/O0 (Hex);
2. Data Protect state will be re-activated at
3. 256 bytes of data MUST BE loaded.
Address Format: A14 - A0 (Hex).
end of program cycle.
Min
100
100
200
200
10
10
Max
150
20
0334G–FLASH–2/05
Units
ms
µs
ns
ns
ns
ns
ns
ns