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13.2 IC451 (C2BBFD000249) System Control

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Pin No. | Mark | I/O | Function
1 | VCC | I | Power connection terminal
2 | VREF | I | Standard voltage input terminal
3 | AVSS | - | Standard voltage input terminal (connected to GND)
4 | MUTE | O | Mute control output terminal
5 | PWCONT | O | DVD module power control output terminal
6 | SYNC | I | Power disruption detection signal input terminal
7 | C/SWOUT | - | Not used, Open
8 | BREQ | I | Serial transmission request signal input terminal
9 | BCS | O | Serial transmission chip select signal output terminal
10 | BCLK | O | Serial transmission clock signal output terminal
11 | DATAO | O | Serial transmission data signal output terminal
12 | DATAI | I | Serial transmission data signal output termianl
13 | CLS | O | Tray close signal output terminal
14 | OPN | O | Tray open signal output terminal
15 | CNVSS | - | Power input terminal (connected toGND through resistor)
16 | TEST | I | Test mode signal input terminal
17 | ECS | - | Serial signal output terminal to EEPROM (not used, open)
18 | /RESET | I | Reset signal input terminal
19 | XIN | I | Crystal oscillator circuit input terminal (=8MHz)
20 | XOUT | O | Crystal oscillator circuit output terminal (=8MHz)
21 | VSS | - | Power input terminal (connected to GND)
22 | LED STB | - | Serial signal output terminal to LED driver (not used, open)
23 | LED/ECLK | - | Serial signal output terminal to EEPROM driver (not used, open)
24 | LED/EDTA | I/O | Serial signal input/output terminal to LED driver (connected to GND through resistor)
25 | LED CLR | _ | Latch clear signal output terminal to LED driver (not used, open)
26 | PLG | O | Plunger control signal output terminal
27 | SW5 | I | Bottom switch detection signal input terminal
28 | PSTN | I | Position sensor detection signal input terminal
29 | SW2 | I | Tray position 2 detection switch input terminal
30 | SW1 | I | Tray position 1 detection switch input terminal
31 | SW3 | I | Tray open detection switch input terminal
32 | CCW | O | Motor drive control signal output terminal (normal rotation)
33 | CW | O | Motor drive control signal output terminal (reverse rotation)
34 | HALH | O | Motor drive control signal output terminal (speed)
35 | DVD CLK | I | Serial transmission clock signal input terminal to DVD module
36 | DVD CMD | I | Serial transmission command signal input terminal to DVD module
37 | DVD STAT | I | Serial transmission status signal input terminal to DVD module
38 | SEL 5/1 | I | Connected to GND through resistor
39 | SW4 | I | Clamp switch detection signal input terminal
40 | KEY2 | - | Operation key 2 signal input terminal (connected to GND)
41 | KEY1 | - | SOperation key 1 signal input terminal (connected to GND)
42 | CSEL | I | Chip select signal input terminal (connected to GND through resistor)

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