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MZ--700
[COLOUR PLOTTER PRINTER CONTROL LSI]
Pin
assignment
Symbol
Name
In/out
Function
Vss
Ground
Connected
to
QV.
Vcc
Main power Connected
to
SV.
VDD
Power
Connected
to
SV.
PROG Program
Out
Not used.
Plo
-
PI
7
Port I
Used
as
printer control signals.
P20
-
P27
Port 2
Used for data input port from
CPU.
Do
-D
7
Data bus
Used for stepper motor control signals.
To
Test pin Q
In
Input from pen change switch.
Tl
Test pin I
In
Input
from paper feed switch.
.
INT Interrupt
input
In Data transfer strobe
MZ·
700 -+ MZlPOl.
RD
Read signal
In Not used.
"
WR
Write signal
Out
Not used.
RESET
Reset
In Used
to
initialize the processor.
ALE
Address latch enable
Out Not used.
PSEN
Program store enable
Out
Not used.
SS
Single step
In Not used.
EA
External access
In Active when EA
=
QV.
Pins used
to
attach the crystal oscillator or
RC
network
to
Xl,
X
2
Crystal inputs
In generate internal clock. However, external clock signal may be
inpu tted through these pins.
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