AT49F2048A-90RI Ver la hoja de datos (PDF) - Atmel Corporation

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AT49F2048A-90RI

2-megabit (256K x 8/128K x 16) 5-volt Only CMOS Flash Memory

Atmel Corporation 

Program Cycle Characteristics

Symbol

tBP

tAS

tAH

tDS

tDH

tWP

tWPH

tEC

Parameter

Byte/Word Programming Time

Address Setup Time

Address Hold Time

Data Setup Time

Data Hold Time

Write Pulse Width

Write Pulse Width High

Erase Cycle Time

Program Cycle Waveforms

OE

PROGRAM CYCLE

Min

Max

Units

50

µs

0

ns

50

ns

50

ns

0

ns

50

ns

40

ns

5

seconds

CE

tWP

WE

tAS

tAH

A0-A16

5555

2AAA

DATA

tDS

AA

55

tWPH

tDH

5555

ADDRESS

A0

INPUT

DATA

Sector or Chip Erase Cycle Waveforms

(1)

OE

tBP

5555

AA

CE

tWP

tWPH

WE

tAS

tAH

A0-A16

5555

2AAA

tDH

5555

5555

2AAA

Note 2

DATA

tDS

AA

BYTE/

WORD 0

55

BYTE/

WORD 1

80

BYTE/

WORD 2

AA

BYTE/

WORD 3

55

BYTE/

WORD 4

tEC

Note 3

BYTE/

WORD 5

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.

8 AT49F2048A

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