at28c010-20tc ATMEL Corporation, at28c010-20tc Datasheet - Page 10

• Manufacturer Part Number: at28c010-20tc
• Description: 1-megabit 128k X 8 Paged Parallel Eeprom
• Manufacturer: ATMEL Corporation

19. Software Data Protection
Notes:
21. Software Protected Write Cycle Waveforms
Notes:
10
Enable Algorithm
1. Data Format: I/O7 - I/O0 (Hex);
2. Write Protect state will be activated at end of write
3. Write Protect state will be deactivated at end of write
4. 1 to 128 bytes of data are loaded.
1. A0 through A14 must conform to the addressing sequence for the first 3 bytes as shown above.
2. After the command sequence has been issued and a page write operation follows, the page address inputs (A7 - A16) must
3. OE must be high only when WE and CE are both low.
AT28C010
Address Format: A14 - A0 (Hex).
even if no other data is loaded.
period even if no other data is loaded.
be the same for each high to low transition of WE (or CE).
LOAD LAST BYTE
ANY ADDRESS
ADDRESS 2AAA
LAST ADDRESS
LOAD DATA AA
ADDRESS 5555
ADDRESS 5555
LOAD DATA XX
LOAD DATA A0
LOAD DATA 55
TO
TO
TO
TO
TO
(4)
WRITES ENABLED
ENTER DATA
PROTECT STATE
(1)
(2)
20. Software Data Protection
Disable Algorithm
(1)(2)(3)
LOAD LAST BYTE
ANY ADDRESS
ADDRESS 2AAA
ADDRESS 2AAA
LAST ADDRESS
ADDRESS 5555
ADDRESS 5555
ADDRESS 5555
ADDRESS 5555
LOAD DATA AA
LOAD DATA AA
LOAD DATA XX
LOAD DATA 55
LOAD DATA 80
LOAD DATA 55
LOAD DATA 20
TO
TO
TO
TO
TO
TO
TO
TO
(4)
EXIT DATA
PROTECT STATE
(1)
0353G–PEEPR–10/06
(3)