AT29LV1024
7
Software Protected Program Waveform
(1)(2)(3)
Notes: 1. A7 through A15 must specify the sector address during each high to low transition of WE (or CE) after the software code
has been entered.
2. OE
must be high when WE and CE are both low.
3. All words that are not loaded within the sector being programmed will be indeterminate.
Programming Algorithm
(1)
Program Cycle Characteristics
Symbol Parameter Min Max Units
t
WC
Write Cycle Time 20 ms
t
AS
Address Set-up Time 0 ns
t
AH
Address Hold Time 100 ns
t
DS
Data Set-up Time 100 ns
t
DH
Data Hold Time 0 ns
t
WP
Write Pulse Width 200 ns
t
WLC
Word Load Cycle Time 150 µs
t
WPH
Write Pulse Width High 200 ns
LOAD DATA AAAA
TO
ADDRESS 5555
LOAD DATA 5555
TO
ADDRESS 2AAA
LOAD DATA A0A0
TO
ADDRESS 5555
LOAD DATA
TO
SECTOR (128 BYTES)
(3)
WRITES ENABLED
ENTER DATA
PROTECT STATE
(2)
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. 128 words of data MUST BE loaded.
