Panasonic KX-W1500

5.2.2 CPU
The KX-W1500 is a microprocessor controlled word processor. It is built around the 8bit HD63BO03X CPU “Central
Processing Unit” (C18), which has full control over all machine functions. It controls the printer. mechanism, the
display, and memory management. The pin names and functions are shown in the following chart.
NAME FUNCTION | . NAME FUNCTION
Vss GND E System Clock (1.75MHz)
XTAL RESONATOR Input RD —_—‘| READ Signal
EXTAL (7MHz) 3 62 WR WRITE Signal
MPO CPU Mode Select | 61 | RW READ/WRITE
MP1 CPU Mode Select 60 LIR Load Instruction
RES Reset | 6 | BA Bus Available |
STBY —_| Stand by Signal Do
NMI Interrupt Signal - | 8 | D1
P20 . 9 | D2
a9 ee =
eae Spacing Motor 7 vi Data Bus
ae pees Signal —-
P24 Carrier Spacing Enable D6
P25 Carrier Return Control 14 D7
P26 BUZZER oa. it -~.§
P27 7 Hz ~ | At |
IRQ 4 Interrupt Signal | A200
P51 _| Display Timing A3 a
-——————_ Address Bus
MR(P52) MEMORY Request 19 A4
P53 HALT AS
P54 Paper Feed Sensor & Carrier Sensor A6
P55 N.C ; AT
P56 Keyboard Vss GND
P57 Data AB
P60 ii AQ
Be Daisywheel rae
P62 ea Att
Bee Phase Signal ae Address Bus
P64 Paper Feed Motor A13
P65 and Ribbon Feed Motor A1l4
P66 Control Signals A15
P67 Ribbon Feed Sensor Vcc +5V
OR x: