Colour Plotter Printer Control Lsi - Sharp mz-800 Technical Reference And User's Manual

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.
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