Nybble Write Clock Truth Table

NW

NW

NW

NW

Current Operation

D

D

D

D

K



K



K



K



K



K



K



K



K



T

T

T

T

Write

Dx stored if NWn = 0 in all four data transfers

D0

D2

D3

D4

T

F

F

F

Write

Dx stored if NWn = 0 in 1st data transfer only

D0

X

X

X

F

T

F

F

Write

Dx stored if NWn = 0 in 2nd data transfer only

X

D1

X

X

F

F

T

F

Write

Dx stored if NWn = 0 in 3rd data transfer only

X

X

D2

X

F

F

F

T

Write

Dx stored if NWn = 0 in 4th data transfer only

X

X

X

D3

F

F

F

F

Write Abort

No Dx stored in any of the four data transfers

X

X

X

X

Notes:

1. “1” = input “high”; “0” = input “low”; “X” = input “don’t care”; “T” = input “true”; “F” = input “false”.

2. If one or more NWn = 0, then NW = “T”, else NW = “F”.

x8 Nybble Write Enable (NWn) Truth Table

NW0

NW1

D0–D3

D4–D7

1

1

Don’t Care

Don’t Care

0

1

Data In

Don’t Care

1

0

Don’t Care

Data In

0

0

Data In

Data In

Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.

Rev: 1.01c 8/2017

11/30

© 2011, GSI Technology

GS8342DT06/11/20/38BD-550/500/450/400/350