Tandy 1000 SL Technical Reference Manual page 97

PIN NAME
SELO
-
SEL2
IOCHCK
COPRNMI
NMI OUT
REFRESH
TRESET
QTY.
-
I / O
3
o u t p u t s
I n p u t
I n p u t
o u t p u t
o u t p u t
I n p u t
3.0 ABSOLUTE M A X I M U M RATINGS
Min
Typ
-
S t o r a g e T e m p e r a t u r e : -65
O p e r a t i n g T e m p e r a t u r e : 0 25
A l l
o u t p u t p i n s -0.5
A l l i n p u t p i n s -0.5
Power S u p p l y ( V c c ) -0.5
Power d i s s i p a t i o n
4
.
0 D. C
.
ELECTRICAL CHARACTERISTICS
4.1
I n p u t s
L e a k a g e c u r r e n t
V i h
V i 1
I n p u t capacitance
2.0
-0.5
DESCRIPTION
1/0
o r
Rom p a g i n g
d e c o d e s , d e p e n d i n g upon
w h e t h e r
a
memory
o r
1/0
c y c l e
i s i n
p r o g r e s s .
NMI
from
1/0 B u s .
N M I
from
8 0 8 7
C o p r o c e s s o r .
N M I
t o
CPU.
R e f r e s h r e q u e s t
t o
t h e
1/0 Bus.
T e s t
p i n .
Low.
Max
1 5 0
7 0
7.0
7 . 0
7.0
7 5 0
-
Max
-
+/-lo
v c c + . 5
0.8
1 0
M u s t
b e t i e d
U n i t s
d e g r e e s C
d e g r e e s C
v o l t s DC
v o l t s
DC
v o l t s DC
m i l l i w a t t s
U n i t s
u A
v o l t s DC
v o l t s DC
PF
4.2 RQ/GT, READY, CLOCK, INTAK, ROMCSOB, ROMCSOB,
DACKl-DACK3, EOP, SELO-SELZ, NMIOUT, CPUALE
-
Min
Max
U n i t s
I o 1
vo
1
I o h
Voh
C a p a c i t i v e l o a d
2
mA
0 . 4 v o l t s
DC
1
mA
2.4 v o l t s
DC
4 0
PF
4