W49V002FA View Datasheet(PDF) - Winbond

Part Name

Description

View to exact match

W49V002FA

256K X 8 CMOS FLASH MEMORY WITH FWH INTERFACE

Winbond 

W49V002FA

Timing Waveforms for FWH Interface Mode, continued

Chip Erase Timing Diagram

CLK

#RESET

FWH4

FWH[3:0]

1st Start IDSEL

1110b 0000b

1 Clock 1 Clock

XXXXb

XXXXb

Address

M Size

Data

XXXXb

X101b 0101b 0101b 0101b 0000b 1010b 1010b

Load Address "5555" in 7 Clocks

Load Data "AA"

in 2 Clocks

Write the 1st command to the device in FWH mode.

TAR

Sync

1111b Tri-State 0000b

2 Clocks 1 Clock

Start next

TAR

command

1111b Tri-State

2 Clocks

1 Clock

CLK

#RESET

FWH4

FWH[3:0]

2th Start IDSEL

1110b 0000b

1 Clock 1 Clock

XXXXb

XXXXb

Address

M Size

Data

XXXXb

X010b 1010b 1010b 1010b 0000b 0101b 0101b

Load Address "2AAA" in 7 Clocks

Load Data "55"

in 2 Clocks

Write the 2nd command to the device in FWH mode.

TAR

Sync

TAR

Start next

command

1111b Tri-State 0000b 1111b Tri-State

2 Clocks 1 Clock

2 Clocks

1 Clock

CLK

#RESET

FWH4

FWH[3:0]

3th Start IDSEL

1110b 0000b

1 Clock 1 Clock

XXXXb

XXXXb

Address

M Size

Data

XXXXb

X101b 0101b 0101b 0101b 0000b 0000b 1000b

Load Address "5555" in 7 Clocks

Load Data "80"

in 2 Clocks

Write the 3rd command to the device in FWH mode.

TAR

Sync

Start next

TAR

command

1111b Tri-State 0000b 1111b Tri-State

2 Clocks 1 Clock

2 Clocks

1 Clock

CLK

#RESET

FWH4

FWH[3:0]

4th Start IDSEL

1110b 0000b

1 Clock 1 Clock

XXXXb

XXXXb

Address

M Size

Data

XXXXb

X101b 0101b 0101b 0101b 0000b 1010b 1010b

Load Address "5555" in 7 Clocks

Load Data "AA"

in 2 Clocks

Write the 4th command to the device in FWH mode.

TAR

Sync

TAR

Start next

command

1111b Tri-State 0000b 1111b Tri-State

2 Clocks 1 Clock

2 Clocks

1 Clock

CLK

#RESET

FWH4

FWH[3:0]

5th Start IDSEL

1110b 0000b

1 Clock 1 Clock

XXXXb

XXXXb

Address

M Size

Data

XXXXb

X010b 1010b 1010b 1010b 0000b 0101b 0101b

Load Address "2AAA" in 7 Clocks

Load Data "55"

in 2 Clocks

Write the 5th command to the device in FWH mode.

TAR

1111b Tri-State

Sync

0000b

TAR

Start next

command

1111b Tri-State

2 Clocks 1 Clock

2 Clocks

1 Clock

CLK

#RESET

FWH4

FWH[3:0]

6th Start IDSEL

1110b 0000b

1 Clock 1 Clock

XXXXb

XXXXb

Address

M Size

Data

XXXXb X101b 0101b 0101b 0101b 0000b 0000b 0001b

Load Address "5555" in 7 Clocks

Load Data "10"

in 2 Clocks

Write the 6th command to the device in FWH mode.

Internal

erase start

TAR

Sync

TAR

1111b Tri-State

0000b

1111b Tri-State Internal

erase start

2 Clocks 1 Clock

2 Clocks

- 27 -

Publication Release Date: February 19, 2002

Revision A2

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