W39V040FAQ datasheet(28/36 Pages) WINBOND

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W39V040FA

- 28 -

Timing Waveforms for FWH Interface Mode, continued

Boot Block Lockout Enable Timing Diagram

CLK

#RESET

FWH4

FWH[3:0]

1st Start

Load Address "5555" in 7 Clocks

1 Clock

2 Clocks

X101b

0101b

Load Data "AA"

in 2 Clocks

1010b

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

Address

Sync

TAR

Data

1111b

Tri-State

0000b

IDSEL

0000b

M Size

XXXXb

Start next

command

1 Clock

2 Clocks

TAR

1111b

Tri-State

1 Clock

0000b

1110b

CLK

#RESET

2nd Start

Load Address "2AAA" in 7 Clocks

1 Clocks

2 Clocks

X010b

1010b

Load Data "55"

in 2 Clocks

0101b

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

Address

Sync

TAR

Data

1111b

Tri-State

0000b

IDSEL

0000b

M Size

XXXXb

Start next

command

1 Clock

2 Clocks

TAR

1111b

Tri-State

1 Clock

0000b

1110b

FWH4

FWH[3:0]

CLK

#RESET

3rd Start

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

1111b

Tri-State

0000b

IDSEL

0000b

M Size

XXXXb

Start next

command

1 Clock

2 Clocks

TAR

1111b

Tri-State

1 Clock

0000b

1110b

FWH4

FWH[3:0]

CLK

#RESET

4th Start

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.

Address

Sync

TAR

Data

1111b

Tri-State

0000b

IDSEL

0000b

M Size

XXXXb

Start next

command

1 Clock

2 Clocks

TAR

1111b

Tri-State

1 Clock

0000b

1110b

FWH4

FWH[3:0]

CLK

#RESET

5th Start

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

1111b

Tri-State

0000b

IDSEL

0000b

M Size

XXXXb

Start next

command

1 Clock

2 Clocks

TAR

1111b

Tri-State

1 Clock

0000b

1110b

FWH4

FWH[3:0]

CLK

#RESET

6th Start

Load Address "5555" 7 Clocks

Sync

TAR

1 Clock

2 Clocks

X101b

Load Data "40" or

"70" in Two Clocks

0100b/

0111b

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

0101b

0000b

1111b

Tri-State

0000b

Data

Address

IDSEL

0000b

M Size

XXXXb

1 Clock

0000b

1110b

FWH4

FWH[3:0]

Start next

command

1 Clock

2 Clocks

TAR

1111b

Tri-State

W39V040FAQ Datasheet(PDF) 28 Page - Winbond

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