Tandy 1000 SL Technical Reference Manual page 124

w
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
HIGH from CLK HIGH Delay Time (Note 2) 250 190 170 ns
m
LOW from CLK HIGH Delay Time
250 190
170 ns
TASM ADR Stable from CLK HIGH
250 190 170 ns
TASS DB to ADSTB LOW
SetuD
Time 100 100
100
ns
-
-
-
-
-
-
-
-
-
-
8237A
TCH
TCL
A.C. CHARACTERISTICS-DMA (MASTER) MODE
TA
0°C to 70°C,
TCASE =
0°C to 75"C,
V c c = +5V
f5%, GND
=
OV
Clock High Time (Transitions<
10
ns)
120
100 l e 0 ns
Clock LOW Time (Transitions<
10
ns)
150
110 1 6 8
ns
1
TCY
TDCL
TDCTR
TDCTW
CLK Cycle Time 320 250 200
tlS
CLK HIGH t o m or LOW Delay (Note 3) 270 200 190 ns
HIGH from CLK HIGH 270 21 0 1 9 0 ns
(S4) Delay Time (Note 3)
HIGH from CLK HIGH 200 150 130 ns
T W 1
T W 2
TEPS
TEPW
TFAAB
ITFAC
I
or
Active from CLK HIGH
I
12001
I
150
I I
150 I n s 1
(S4) Delay Time (Note 3)
HRQ Valid from CLK HIGH Delay Time (Note 4) 160
120 120
250 1 9 0 120
m
LOW from CLK LOW Setup Time 60 45 40
Pulse Width 300 225 220
ADR Float to Active Delav from CLK HIGH
250 190 170
TRH
TRS
CLK to READY LOW Hold Time 20 20 20 ns
READY to CLK LOW Setup Time
100
60
60
ns
2-246
TSTL
TSlT
ADSTB HIGH from CLK HIGH Delay Time 200 150 130
ADSTB LOW from CLK HIGH Delay Time 140 110 90