AT29C1024-12 ATMEL Corporation, AT29C1024-12 Datasheet - Page 8

• Manufacturer Part Number: AT29C1024-12
• Description: 1 Megabit 64K x 16 5-volt Only CMOS Flash Memory
• Manufacturer: ATMEL Corporation

Software Protected Program Cycle Waveform
Notes: 1. A7 through A15 must specify the same page address
Software Data
Protection Enable Algorithm
Notes for software program code:
1. Data Format: I/O15 - I/O0 (Hex);
2. Write Protect state will be activated at end of write period
3. Write Protect state will be deactivated at end of write period
4. 128 words of data
4-148
Address Format: A14 - A0 (Hex).
even if no other data is loaded.
even if no other data is loaded.
during each high to low transition of WE (or CE) after
the software code has been entered.
SECTOR (128 WORDS)
LOAD DATA AAAA
LOAD DATA A0A0
LOAD DATA 5555
ADDRESS 2AAA
ADDRESS 5555
ADDRESS 5555
LOAD DATA
MUST BE
TO
TO
TO
TO
AT29C1024
loaded.
(4)
WRITES ENABLED
ENTER DATA
PROTECT STATE
(1)
(2)
Software Data
Protection Disable Algorithm
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.
(1, 2, 3)
SECTOR (128 WORDS)
LOAD DATA AAAA
LOAD DATA AAAA
LOAD DATA XXXX
LOAD DATA 5555
LOAD DATA 8080
LOAD DATA 5555
LOAD DATA 2020
ADDRESS 2AAA
ADDRESS 2AAA
ADDRESS 5555
ADDRESS 5555
ADDRESS 5555
ADDRESS 5555
TO
TO
TO
TO
TO
TO
TO
(4)
EXIT DATA
PROTECT STATE
(1)
(3)