GS81302D38E-400 Datasheet, PDF (10/31 Pages) GSI Technology – Dual Double Data Rate interface

GS81302D06/11/20/38E-500/450/400/350
Byte Write Clock Truth Table
BW
BW
BW
BW
Current Operation
D
D
D
D
K
(t_n+1)
T
K
(t_n+1½)
T
K
(t_n+2)
T
K
(t_n+2½)
T
K
(t_n)
Write
Dx stored if BWn = 0 in all four data transfers
K
(t_n+1)
D0
K
(t_n+1½)
D2
K
(t_n+2)
D3
K
(t_n+2½)
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”.
Rev: 1.05c 8/2017
10/31
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
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