Casio 120CR Service Manual page 15

Pin No. Signal In/Out
41 P32/TO2 In
42 P31/TO1 In
43 P30/TO0 In
44 P03/INTP3/CI0 In
45 P02/INTP2 In
46 P01/INTP1 In
47 P00/INTP0/TI0 In
48 IC -
49 P72 In
50 P71 In
51 P70 In
52 VDD -
53 P127/FIP33 In
54 P126/FIP32 In
55 P125/FIP31 In
56 P124/FIP30 In
57 P123/FIP29 In
58 P122/FIP28 In
59 P121/FIP27 In
60 P120/FIP26 In
61 P117/FIP25 Out
62 P116/FIP24 Out
63 P115/FIP23 Out
64 P114/FIP22 Out
65 P113/FIP21 Out
66 P112/FIP20 Out
67 P111/FIP19 Out
68 P110/FIP18 Out
69 P107/FIP17 Out
70 P106/FIP16 Out
71 VLOAD -
72 P105/FIP15 Out
73 P104/FIP14 Out
74 P103/FIP13 Out
75 P102/FIP12 Out
76 P101/FIP11 Out
77 P100/FIP10 Out
78 P97/FIP9 Out
79 P96/FIP8 Out
80 P95/FIP7 Out
Note : Above data is measured under following condition.
Mode SW REG : AC cord plug in the AC outlet, Memory protection batteries in,
Mode SW OFF :
AC cord plug off : AC cord plug out the AC outlet, memory protection batteries in,
Mode SW Mode SW AC cord
REG OFF Plug off
H L
L L
L L
H L
H Pulse
L L
H L
GND GND GND
H H
- -
L H
+5V +5V
L L
L L
L L
L L
L L
L L
L L
L L
L L
L L
L L
Pulse L
Pulse L
Pulse L
Pulse L
H H
Pulse -24V
Pulse -24V
-24V -24V
Pulse -24V
Pulse -24V
Pulse -24V
Pulse -24V
Pulse -24V
Pulse -24V
H Pulse
Pulse -24V
Pulse -24V
Mode SW position : REG
AC cord plug in the AC outlet, Memory protection batteries in,
Mode SW position : OFF
Mode SW position : OFF
— 13 —
Description
L Mode switch position (REG)
L Mode switch position (RF)
L Mode switch position (PRG)
L Reset pulse RP from printer
L Sub timimg pulse Pt from printer
H Power down signal PWD
L Main timing pulse PT from printer
GND
H TAX PAD signal for Japan
- PAD2 condition
H PAD1 condition
+5V Power (+5V)
L Key input signal KI7
L Key input signal KI6
L Key input signal KI5
L Key input signal KI4
L Key input signal KI3
L Key input signal KI2
L Key input signal KI1
L Key input signal KI0
L Winder motor drive signal WMO
L Printer moter drive signal PMO
L Head drive signal for printer PHD
L Key common signal KC3
L Key common signal KC2
L Key common signal KC1
L Key common signal KC0
H Not used (+5V)
L Display segment signal Sdp (Decimal point
L Display segment signal Sg
L Display voltage VN
L Display segment signal Sf
L Display segment signal Se
L Display segment signal Sd
L Display segment signal Sc
L Display segment signal Sb
L Display segment signal Sa
L Mode switch common signal
L Display digit signal DG9
L Display digit signal DG8