Rainbow Electronics AT29C010A - Manual (Page 10)

10
AT29C010A
0394D–FLASH–05/02
Software Data Protection Enable
Algorithm
(1)
Notes: 1. Data Format: I/O7 - I/O0 (Hex); Address Format:
A14 - A0 (Hex).
2. Data Protect state will be activated at end of pro-
gram cycle.
3. Data Protect state will be deactivated at end of pro-
gram period.
4. 128 bytes of data MUST BE loaded.
LOAD DATA AA
TO
ADDRESS 5555
LOAD DATA 55
TO
ADDRESS 2AAA
LOAD DATA A0
TO
ADDRESS 5555
LOAD DATA
TO
PAGE (128 BYTES) (4)
WRITES ENABLED
ENTER DATA
PROTECT STATE (2)
Software Data Protection Disable
Algorithm
(1)
LOAD DATA AA
TO
ADDRESS 5555
LOAD DATA 55
TO
ADDRESS 2AAA
LOAD DATA 80
TO
ADDRESS 5555
LOAD DATA AA
TO
ADDRESS 5555
LOAD DATA 55
TO
ADDRESS 2AAA
LOAD DATA 20
TO
ADDRESS 5555
LOAD DATA
TO
PAGE (128 BYTES) (4)
EXIT DATA
PROTECT STATE (3)
Software Protected Program Cycle Waveform
(1)(2)(3)
Notes: 1. A7 through A16 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 bytes that are not loaded within the sector being programmed will be indeterminate.