Sony CF-CD73 - IC Pin Function Description

34
ICF-CD73/CD73V
6-16. IC PIN FUNCTION DESCRIPTION
• LCD BOARD IC401 µPD789477GC-A33-8BT (SYSTEM CONTROLLER)
Pin No. Pin Name
I/O
Description
1, 2 NC — Not used
3 to 5 VLC2 to VLC0 — Terminal for doubler circuit capacitor connection to develop liquid crystal display drive voltage
6 to 9 COM0 to COM3 O Common drive signal output to the liquid crystal display
10 to 27 SEG17 to SEG0 O Segment drive signal output to the liquid crystal display
28 to 30
VERSION0 to
VERSION2
I Setting input terminal for destination
31 POWER ON O
Power on/off control signal output terminal for the power amplifier
“L”: standby mode, “H”: power amplifier on
32 R ON O Power on/off control signal output for the tuner section “H”: tuner power on
33 to 37 NC I Not used
38 AVDD — Power supply terminal (+3.3V) (analog system)
39 FSEQ I CD synchronizing signal detection signal input from the digital signal processor
40 NC I Not used
41 AC IN I Power detection signal input terminal when connected AC power adapter (A/D input)
42 VM I Middle voltage (+3V) detection input for battery check
43 VH I High voltage (+6V) detection signal input for AC or battery check
44 to 46 KEY2 to KEY0 I Front and top panel key input terminal (A/D input)
47 AVSS — Ground terminal (for analog system)
48 NC I Not used
49 DC CHK I Power failure detection signal input terminal “L”: power failure, “H”: power on
50 WRQ I CD interruption signal input from the digital signal processor
51 KEY CHK I Key interruption detection signal input terminal
52 BUZZER O Beep sound signal output terminal
53 CD DATA IN I Serial data input from the digital signal processor
54 CD DATA O Serial data output to the digital signal processor
55 CD CLK O Serial data transfer clock signal output to the digital signal processor
56 CD CE O Chip enable signal output to the digital signal processor
57 DRF I CD focus on/off detection signal input from the digital signal processor
58 XRST O System reset signal output to the digital signal processor “L”: reset
59 CD ON O Power on/off control signal output for the CD section “H”: CD power on
60 NC I Not used
61 CD OPEN I CD lid open/close detect switch input terminal “L”: CD lid is closed, “H”: CD lid is opened
62 MUTE O Tuner muting on/off control signal output to the FM/AM PLL “L”: muting on
63 COUNT I PLL serial count data input terminal from the FM/AM PLL
64 R CLK O PLL serial data transfer clock signal output to the FM/AM PLL
65 R DATA O PLL serial data output to the FM/AM PLL
66 R CE O PLL chip enable signal output to the FM/AM PLL
67, 68 NC I Not used
69 IC — Ground terminal
70 XT1 I Sub system clock input terminal (32.768 kHz)
71 XT2 O Sub system clock output terminal (32.768 kHz)
72 VDD0 — Power supply terminal (+3.3V)
73 VSS0 — Ground terminal
74 X1 I Main system clock input terminal (4.19 MHz)
75 X2 O Main system clock output terminal (4.19 MHz)
Ver. 1.1