7. PIN FUNCTION
CPU (HD62119A03)
Pin No.Pin NameInput/OutputFunction
1 ~ 12KO1 ~ KO12OKey common signal
13 ~ 20KI1 ~ KI8IKey input signal
21BUFONOChip selecting signal for RAM
22IT2IInterrupt input
23IT0NInterrupt input
24 ~ 42AO0 ~ AO18OAddress bus
43OEBOOEnable signal
44WEBOOEnable signal to write
49 ~ 51CS4BO ~ CS6BOOChip selecting signals
52 ~ 59IO0 ~ IO7IData bus
62, 63OPT0, OPT1OOutput point for check
64 ~ 71PORT0 ~ PORT7I/OInput/output port
72VSSNGND
73, 74PI, PONPower for ceramic oscillator
75VLCNPower
76, 77XO, XINPower
78VCCNPower for LSI
79VREG2NPower
80, 81TS1, TS2ITerminal for test
82VSSRNGND
83BZZ1OBuzzer signal output
84BZZ2OBuzzer signal output
85VSSNGND
86OCLKOClock
87ITOFFI/OTerminal for power switch
89SWIReset switch
90VDBNPower
91 ~ 94VD1 ~ VD4NPower for doubler
95VREG1NRegulator power for LSI
96VREG4NRegulator power for ROM
97VREG5NRegulator power
98, 99VDT1I, VDT2IITerminal for detector
100VREG3NRegulator power for RAM
N 9 N |