KX-PX1CX - Panasonic Copying Equipment Service Manual (repair manual). Page 28

28

39

P40/ (78KIRQ0#)

General port

L

Interruption request 0 (to the Print CPU)

O

W

40

*RESET

Reset input

L

ICE_RESET
Reset input signal from the MAIN microcom-
puter

I

41

P124/(SYS_ERR) General port

L

SYS_ERR
When control of the ERROR_LED is disabled 
due to a problem with the MAIN microcom-
puter, the lighting control of ERROR_LED is 
performed by the SUB microcomputer

O

R

42

P123(iPOWER-
OFF)

General port

H

POWER OFF request “H”: Enable (a request is 
made)/ ”L” : Disable
Output a power off request to the CPU for the 
display control system of PX10

O

R

43

FLMD0

Programming mode

H

Flash write mode inside 78K (during writing: 
High)

I

44

P122/X2

General port/oscillation

-

Clock oscillator (10MHz)(10MHz)

O

45

P121/X1

General port/oscillation

-

Clock oscillator (10MHz)(10MHz)

I

46

REGC

Built-in regulator 

Condenser terminal for the inside power supply 
regulator

-

47

VSS

GND

GND

-

48

VDD

Power supply

3.3v power supply

-

Pin

Signal Name

Standard function

Act.

Purpose 

I/O

R/W