Pioneer FX-K99DK WG Service Manual page 38

@ *PD4050B
Pin Functions
LATCH BUFFER
LATCH BUFFER
IC's marked by *are MOS type.
liable to be damaged by electrostatic induction.
COUNT
CLOCK
GENERATOR
H (4); L (4)
STACK
POINTER (8)
MEMORY
PROGRAM (28x 4 BITS
MEMORY
INSTRUCTION
DECODER
Function and Operation
EJECT input from reel motor control IC. Active "H",
oh ,
CPU hardware reset input. Active ''H''.
System clock generator circuit CR connection pins. (200kHz)
a
Power supply pin
aera a pee
100Hz input from PD4022B.
Output
Smali lamp input.
Serial interface serial clock input/output pin.
Serial interface data output pin
Serial interface data input pin
45
r
Door opening output port. Active ''H''.