Tandy 1000 HX Technical Reference Manual page 153

. TANDY COMPUTER PRODUCTS
4.0
4.1
4.2
4.3
4.4
AC CHARACTERISTICS
FDCCLK Timing
Parameter
WCK Timing
t
H
^ R
f t
F
WRDATA* Timing
WCK - W E
H
WCK^-WE"
PSD
L L
WDD
WDA
W
WRD
WDD -WRD
L
early
WDD -WRD
T
nominal
WDD^-WRD£ late
DMA/INTERRUPT Timing
I
H
- F I
H
L L
WCK -DRQ
H
WCK^-DRQ"
DRQ
H
-FDRQ
H
DRQ7-FDRQ?
DIr-PDRQr
FCK
H
-FDRQ
H
Min
90
100
245
100
20
20
20
20
115
150
275
400
0
750
. Typ.
120
5
120
250
250
tcr-;jH-
Max.
130
10
160
255
250
10
Ht
R
+t
F
)
100
100
WCK
H
-50
125 *135
250
375
500
30
30
30
-20
1050
30
30
30
Units
nSec
nSec
nSec
nSec
nSec
nSec
liSec
nSec
nSec
nSec
nSec
nSec
nSec
nSec
nSec
nSec
nSec
nSec
nSec
nSec
nSec
nSec
nSec
nSec
nSec