W39V040FAQ datasheet(29/36 Pages) WINBOND

29 / 36 page

W39V040FA

Publication Release Date: December 19, 2002

- 29 -

Revision A2

Timing Waveforms for FWH Interface Mode, continued

Chip Erase Timing Diagram

Load Address "5555" in 7 Clocks

Sync

Internal

erase start

TAR

1 Clock

X101b

Load Data "10"

in 2 Clocks

0001b

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

0101b

0000b

1111b

Tri-State

0000b

Data

Address

FWH4

#RESET

FWH[3:0]

1st Start

CLK

X101b

0101b

1010b

FWH4

#RESET

FWH[3:0]

CLK

FWH4

#RESET

FWH[3:0]

CLK

FWH4

#RESET

FWH[3:0]

CLK

Address

Sync

TAR

Data

Load Address "5555" in 7 Clocks

1 Clock

2 Clocks

Load Data "AA"

in 2 Clocks

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

Load Address "2AAA" in 7 Clocks

1 Clock

2 Clocks

X010b

1010b

Load Data "55"

in 2 Clocks

0101b

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

Load Address "5555" in 7 Clocks

1 Clock

2 Clocks

X101b

0101b

Load Data "80"

in 2 Clocks

1000b

0000b

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

Address

Sync

TAR

Data

Sync

TAR

Data

1111b

Tri-State

0000b

1111b

Tri-State

0000b

1111b

Tri-State

0000b

Load Address "5555" in 7 Clocks

1 Clock

2 Clocks

X101b

0101b

Load Data "AA"

in 2 Clocks

1010b

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

Load Address "2AAA" in 7 Clocks

1 Clock

2 Clocks

X010b

1010b

Load Data "55"

in 2 Clocks

0101b

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

Address

Sync

TAR

Data

Sync

TAR

Data

1111b

Tri-State

0000b

1111b

Tri-State

0000b

FWH4

#RESET

FWH[3:0]

CLK

FWH4

#RESET

FWH[3:0]

CLK

2 Clocks

IDSEL

0000b

M Size

XXXXb

Start next

command

1 Clock

2 Clocks

TAR

1111b

Tri-State

Start next

command

1 Clock

2 Clocks

TAR

1111b

Tri-State

Start next

command

1 Clock

2 Clocks

TAR

1111b

Tri-State

Start next

command

1 Clock

2 Clocks

TAR

1111b

Tri-State

Start next

command

1 Clock

2 Clocks

TAR

1111b

Tri-State

Internal

erase start

TAR

2 Clocks

1111b Tri-State

6th Start

IDSEL

5th Start

IDSEL

4th Start

IDSEL

3th Start

IDSEL

2th Start

IDSEL

1 Clock

0000b

1110b

1 Clock

0000b

1110b

1 Clock

0000b

1110b

1 Clock

0000b

1110b

1 Clock

0000b

1110b

1 Clock

0000b

1110b

W39V040FAQ Datasheet(PDF) 29 Page - Winbond

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