15.1 IC451 (M38504M6200F):/System Control
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Pin No. Terminal Name I/O Function
1 Vcc I Power supply terminal
2 VREF I Reference voltage input
3 AVSS - GND terminal
4 SYNC I Power failure detect signal input
5 SUBQ I Sub-code Q data signal input
6 SQCK O Sub code Q resistor clock signal output
7 BLKCK I Block clock signal input
8 CD REQ I Serial communication signal to Sound Processor (Request signal input)
9 B CS O Serial communication signal to Sound Processor (Chip select signal output)
10 B CLK O Serial communication signal to Sound Processor (Clock signal output)
11 DATA O O Serial communication signal to Sound Processor (Data signal output)
12 DATA I I Serial communication signal to Sound Processor (Data signal input)
13 TEST I Test mode select signal input/(Connected to VCC via resistor)
14 RESTSW I Rest switch signal input
15 CNVSS - Connected to VSS
16 SERVO RST O Reset signal output for CD servo IC
17 E-CS - EEPROM serial communication signal
(Not used, open)
18 RESET I Reset signal input
19 X IN I Oscillator connected terminal (8 MHz)
20 X OUT O
21 VSS - GND terminal
22 LED ORG O ORANGE LED signal output
23 E-CLK - Serial communication signal to EEPROM
(Clock signal output) (Not used, open)
24 E-DATA O Serial communication signal to EEPROM
(Data signal output)
25 LED GRN O GREEN LED signal output
26 MSEL I Function select signal input/(Connected to VCC via resistor)
27 MDATA O Command data output
28 MCLK O Command clock output
29 MLD O Command load output
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