Casio DL-210L Service Manual - Page 4

3. CPU (MN158418YCY) PIN FUNCTION Pin No. Signal I/O 1 ~ 7, 64 P00 ~ P13 Out 8 ~ 12 P20 ~ P22, P32, P33 In 13 IRQ In 14 DEBIN In 15 IRQCNT In 16 P40 Out 17 P41 Out 18 ~ 30 P42, P43, P50 ~ P53, Out P70 ~ P73, P80 ~ P82 31, 32 P83, P90 Out 33 ~ 39 P91 ~ P93 Out PA0 ~ PA3 40 P60 In 41 ~ 43 P61 ~ P63 In 44 ~ 56 PB0 ~ PB3, Out PC0 ~ PC3, PD0 ~ PD3, PE0 57 VPP In 58 VDD In 59, 60 OSC1, OSC2 I/O 61 VSS In 62 SYNC - 63 RST In Function Common signal for keyboard Key signal from keyboard Timing pulse signal from printer Reset pulse (Not used) Auxiliary timing (VDD) Motor control signal Ribbon shift signal for printer Character selective signal for printer Segment signal for display, Character selective signal for printer Common signal for slide switch, Segment signal for display Input port (VDD) Signal from slide switch Digit signal for display GND terminal VDD terminal (+32 V) Clock signal for CPU VSS terminal (+27 V) Not used Signal from slide switch, Reset signal - 2 -