Radio Shack TRS-80 MICRO User Manual

4)
Error
state
5)
Ribbon
fault
state
6)
Cover
open
state
Ready
condition:
1)
States
other
than
above
1) to
6)
2) Cover
close
state
(2)
OUT
OF
PAPER
No
function.
This
line
is
always
"0"
signal.
(3)
BUSY
This
signal
is the
logical
invers
of
BUSY.
(4)ACK
This
signal
is
indicates
Printer
is
no
longer
busy.
(5)
FAULT
This
signal
indicates
Printer
is
in error
state,
in
ribbon fault
state,
in
cover
open state
or
in off
line
state.
Interface
Signal
Pin
Assignments
Pin
18
pin 1
pin
36
z)
pin
19
Pin
Signal
Name
Pin Signal
Name
1
19
GND
STROBE
2
DATA
1
20
GND
3
DATA 2
21
GND
4
DATA
3
22
GND
5
DATA
4
23
GND
6
DATA
5
24 GND
7
DATA
6
25
GND
8
DATA 7
26
GND
9
DATA
8
27
GND
10
ACK
28 GND
11
BUSY
29
GND
12
OUT
OF PAPER
30
GND
13
14
BUSY
GND
31
32
N.C
FAULT
15
GND
33
GND
16
GND
34 N.C
17
GND
35 N.C
18
+
5
VDC
36 N.C
Note:
•
N.C.
pins are
actually
pulled
up
to
+
5
VDC
through
a
4.7K
resistor.
•
Pin
18 provides
+
5
VDC
to
the
TRS-80
(less than
80
mA
of current).
-
24

Radio Shack TRS-80 MICRO Specifications

General

Brand	Radio Shack
Model	TRS-80 MICRO
Category	Printer
Language	English