Sharp MZ-800 Technical Reference And User's Guide

11-10 Colour plotter printer controllSI
Pin assignment
Symbol Name
In/out
Function
V ss Ground
Connected to OV.
V cc Main power
Connected to SV.
Voo Power
I
Connected to SV.
PROG
Program
I
Out Not used.
Plo ...... Pl
7
Port
1 Used as printer control signals.
P2o ....... P27
I
Port 2
Used for data input port from
CPU.
D
0
-D7
I
Data bus
Used for stepper motor control signals.
To
Test pin 0
In
Input from pen change switch.
Tl
Test pin 1
In
Input from paper feed switch.
INT
I
Interrupt input
In
Data transfer strobe MZ- 700""""" MZ I PO 1.
RD
!
Read signal In Not used.
I
WR Write signal
I
Out
Not used.
I
I
RESET
Reset
In
Used to initialize the processor.
I
ALE
!
Address latch enable Out
I
Not used.
PSEN
Program
store enable Out Not used.
ss
Single step
In
Not used.
EA
External access
In
Active when
EA = OV.
Pins used to attach the crystal oscillatQr or RC network to
X1, X2
Crystal inputs
In generate internal clock. However, external clock signal may
be
inputted through these pins.
38

Sharp MZ-800 Specifications

General

Brand	Sharp
Model	MZ-800
Category	Desktop
Language	English