W39V040CP View Datasheet(PDF) - Winbond

Part Name

Description

Manufacturer

W39V040CP

512K X 8 CMOS FLASH MEMORY WITH LPC INTERFACE

Winbond 

13.3 Program Cycle Timing Diagram

W39V040C

CLK

#RESET

#LFRAM

LAD[3:0]

Memory

Write

1st Start Cycle

0000b 011Xb

1 Clock 1 Clock

XXXXb

XXXXb

Address

XXXXb

XXXXb

X101b

0101b

Load Address "5555" in 8 Clocks

0101b

Data

TAR

Sync

0101b

1010b

1010b 1111b Tri-State 0000b

Load Data "AA" in 2 Clocks 2 Clocks

1 Clock

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

CLK

#RESET

TAR

Start next

command

1 Clock

#LFRAM

LAD[3:0]

Memory

Write

2nd Start Cycle

0000b 011Xb

1 Clock 1 Clock

XXXXb

XXXXb

Address

Data

XXXXb

XXXXb

X010b

1010b

1010b

1010b

0101b

0101b

Load Address "2AAA" in 8 Clocks

Load Data "55"

in 2 Clocks

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

TAR

Sync

1111b Tri-State 0000b

2 Clocks

1 Clock

CLK

#RESET

TAR

Start next

command

1 Clock

#LFRAM

LAD[3:0]

Memory

Write

3rd Start Cycle

0000b 011Xb

1 Clock 1 Clock

XXXXb

XXXXb

Address

Data

XXXXb

XXXXb

X101b

0101b

0101b

0101b

0000b

1010b

Load Address "5555" in 8 Clocks

Load Data "A0"

in 2 Clocks

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

TAR

Sync

1111b Tri-State 0000b

2 Clocks

1 Clock

CLK

#RESET

TAR

Start next

command

1 Clock

#LFRAM

LAD[3:0]

Memory

Write

4th Start Cycle

Address

0000b 011Xb

A[31:28] A[27:24] A[23:20] A[19:16]

A[15:12]

1 Clock 1 Clock

Load Ain in 8 Clocks

A[11:8]

A[7:4]

Data

TAR

Sync

A[3:0]

D[3:0]

D[7:4]

1111b Tri-State 0000b

Load Din in 2 Clocks

2 Clocks

1 Clock

Internal

program start

TAR

Internal

program start

Write the 4th command(target location to be programmed) to the device in LPC mode.

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