Byte Write Clock Truth Table

BW

BW

BW

BW

Current Operation

D

D

D

D

K



K



K



K



K



K



K



K



K



T

T

T

T

Write

Dx stored if BWn = 0 in all four data transfers

D0

D2

D3

D4

T

F

F

F

Write

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

D0

X

X

X

F

T

F

F

Write

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

X

D1

X

X

F

F

T

F

Write

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

X

X

D2

X

F

F

F

T

Write

Dx stored if BWn = 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 BWn = 0, then BW = “T”, else BW = “F”.

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

Rev: 1.00b 5/2017

8/26

© 2017, GSI Technology

Preliminary

GS81302D20/38AGD-633/550/500/450