11

AT49BV/LV2048A

1914D–FLASH–03/02

Program Cycle Waveforms

Sector 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 5555. For sector erase, the address depends on what sector is to be erased.

(See note 4 under Command Definitions.)

3. For chip erase, the data should be 10H, and for sector erase, the data should be 30H.

Program Cycle Characteristics

Symbol

Parameter

Min

Typ

Max

Units

Byte/Word Programming Time

30

µs

t

AS

Address Setup Time

0

ns

t

AH

Address Hold Time

70

ns

t

DS

Data Setup Time

70

ns

Data Hold Time

0

ns

Write Pulse Width

70

ns

Write Pulse Width High

50

ns

t

EC

Erase Cycle Time

10

seconds

OE

INPUT DATA

ADDRESS

A0

55

5555

5555

AA

2AAA

t BP

t WPH

t WP

CE

WE

t

AS

tAH

t DH

t DS

5555

AA

PROGRAM CYCLE

A0-A16

DATA

OE

(1)

AA

80

55

55

5555

5555

AA

2AAA

2AAA

t

WPH

t

WP

CE

WE

t AS

tAH

t EC

t DH

t DS

5555

A0-A16

DATA

Note 2

Note 3

WORD 0

WORD 1

WORD 2

WORD 3

WORD 4

WORD 5