LOAD LAST BYTE

TO

LAST ADDRESS

LOAD DATA A0

TO

ADDRESS 5555

LOAD DATA 55

TO

ADDRESS 2AAA

LOAD DATA AA

TO

ADDRESS 5555

Notes:

1. Data Format: I/O7 - I/O0 (Hex);

Address Format: A14 - A0 (Hex).

2. Write Protect state will be activated at end of write even if no

other data is loaded.

3. Write Protect state will be deactivated at end of write period

even if no other data is loaded.

4. 1 to 128-bytes of data are loaded.

ENTER DATA

PROTECT STATE

WRITES ENABLED

(2)

Software Data

Protection Enable Algorithm

(1)

LOAD DATA XX

TO

ANY ADDRESS

(4)

LOAD LAST BYTE

TO

LAST ADDRESS

LOAD DATA 55

TO

ADDRESS 2AAA

LOAD DATA AA

TO

ADDRESS 5555

LOAD DATA 80

TO

ADDRESS 5555

LOAD DATA 55

TO

ADDRESS 2AAA

LOAD DATA AA

TO

ADDRESS 5555

LOAD DATA 20

TO

ADDRESS 5555

EXIT DATA

PROTECT STATE

(3)

Software Data

Protection Disable Algorithm

(1)

LOAD DATA XX

TO

ANY ADDRESS

(4)

Software Protected Program Cycle Waveform

(1, 2, 3)

Notes: 1. A0 - 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 be the same for each high to low

transition of WE (or CE).

3. OE must be high only when WE and CE are both low.

2-250

AT28C010 Mil