9

AT49BV/LV1024A

3332B–FLASH–12/03

Program Cycle Waveforms

Main Memory or Chip Erase Cycle Waveforms

Notes:

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

2. For chip erase, the address should be 10H. For a main memory erase, the data should be 30H.

Program Cycle Characteristics

Symbol

Parameter

Min

Typ

Max

Units

t

BP

Word Programming Time

20

50

µs

t

AS

Address Setup Time

0

ns

Address Hold Time

35

ns

t

DS

Data Setup Time

35

ns

t

DH

Data Hold Time

0

ns

Write Pulse Width

35

ns

t

WPH

Write Pulse Width High

35

ns

t

EC

Erase Cycle Time

1.5

3

seconds

A0-A15

OE

AA

80

NOTE 2

55

55

555

555

555

AA

WORD 0

WORD 1

WORD 2

WORD 3

WORD 4

WORD 5

AAA

AAA

CE

WE

A0-A15

DATA

555