Program Cycle Characteristics

Symbol

Parameter

Min

Max

Units

Write Cycle Time

20

ms

Address Set-up Time

10

ns

Address Hold Time

100

ns

Data Set-up Time

100

ns

Data Hold Time

10

ns

Write Pulse Width

200

ns

Byte Load Cycle Time

150

µs

Write Pulse Width High

200

ns

Software Protected Program Waveform

(1, 2, 3)

Notes: 1. OE must be high when WE and CE are both low.

2. A6 through A14 must specify the sector address

during each high to low transition of WE (or CE)

after the software code has been entered.

3. All bytes that are not loaded within the sector being

programmed will be indeterminate.

LOAD DATA

TO

SECTOR (64 BYTES)

(3)

LOAD DATA A0

TO

ADDRESS 5555

LOAD DATA 55

TO

ADDRESS 2AAA

LOAD DATA AA

TO

ADDRESS 5555

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.

ENTER DATA

PROTECT STATE

(2)

WRITES ENABLED

Programming Algorithm

(1)

AT29LV256

4-39