Casio QG-100, Инструкция по эксплуатации, обслуживанию и список запчастей

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Pin No. Name I / O Function
1~24 A0~A23 I/O Address bus
25 /RE O Read signal to program ROM(LSI3),S-RAM(LSI4) & gate array(LSI2)
27 /WEH O Write signal to S-RAM(LSI4),RS-RAM(LSI5,6) & gate array(LSI2)
28~31 PO0~PO3 I Setting for head rank
33~35 PO5~PO7 O Control signal for LED
36~43 D8~D15 I/O Data bus
44 RAS O Refresh signal to gate array(LSI2)
45 /CS0 O Chip select signal to program ROM(LSI3)
49 VSS — Digital ground for LSI1
50 VDD I Power supply for LSI1
51 /RST I Reset for LSI1(from gate array)
52 /BUSREQ I Bus request from gate array(LSI2)
53 /BUSGT O Bus grant signal to gate array(LSI2)
55 AD0 I Detection of temperature for thermal head
56 AD1 I Adjustment of temperature for OP layer
57 AD2 I Adjustment of picture contrast
59 AVDD I Power supply for A/D converter of LSI1
60 AVSS — Analog ground for A/D converter of LSI1
61~64 RTOA0~RTOA3 O Data for stepping motor control(4 bits)
65~66 RTOB0~RTOB3 O Data for DC motor control(2 bits)
69 SBI0 I Serial data input from QV camera
70 SBO0 O Serial data output to QV camera
71 P42 O Control signal for power supply of stepping motor
73~74 IRQ0~IRQ1 I Interrupt request from gate array(LSI2)
75~76 /KO0~/KO1 O Key scanning signal
77~79 /KI0~KI2 I Key scanning signal
80 /KI3 I Signal from tape cutter sensor
81 /KI4 I Signal from home position sensor
82 /KI5 I Signal from ribbon sensor
83 /KI6 I Signal from paper sensor
84 /KI7 I Signal from jam sensor
85 P70 I Detection of tape color(monochromatic tape/color tape)
86 P71 I Detection of tape length
87 P72 I Detection of black ink ribbon
89~91 P74~P76 I Detection of tape width
93 SYSCLK O System clock to gate array(LSI2), 6 MHz
97 VDD I Power supply for LSI1
98 OSCI I Clock for LSI1(from gate array(LSI2)), 12MHz
100 VSS — Digital ground for LSI1
5. CIRCUIT EXPLANATION
5-1. LSI PIN FUNCTION
CPU (MN1020004-1): LSI1