Ic Pin Function Description - Sony ICF-CD513 Service Manual

6-9. IC PIN FUCTION DESCRIPTION
• MAIN BOARD IC401 µPD789406AGC-017-8BT (SYSTEM CONTROLLER)
Pin No. Pin Name
1 VDD1
2 BIAS
3 to 5 VLC0 to VLC2
6 VSS1
7 to 10 COM0 to COM3
11 to 26 SEG0 to SEG15
27 to 31 NC
32 BUZ MUT
33 C RST
34 KS4
35 to 38 KS0 to KS3
39 AVDD
40 AVREF
41 VERSION0
42 VERSION1
43 CLOSE
44 OPEN
45 C SENS2
46 C SENS1
47 C SQSO
48 AVSS
49 SCOR
50 C MUT
51 C SQCK
52 AC IN
53 BUZZER
54 C CLK
55 C LAT
56 C DATA
57 M MUT
58 AMUT
59 CD ON
60 RADIO ON
61 R DATA
62 R CLK
63 R LAT
64 POWER ON
65 SHIFT0
66 SHIFT1
67 RESET
68 X2
69 X1
I/O
— Power supply terminal (+5V)
O Bias output for the liquid crystal display drive
— Terminal for doubler circuit capacitor connection to develop liquid crystal display drive voltage
— Ground terminal
O Common drive signal output to the liquid crystal display (LCD401)
O Segment drive signal output to the liquid crystal display (LCD401)
— Not used (fixed at "L")
Buzzer sound muting on/off control signal output terminal "L": muting on
O
Not used (pull down)
O System reset signal output to the CXA1992BR (IC501) and CXD2589Q (IC551) "L": reset
O Key strobe signal output to the key matrix
O Key strobe signal output to the key matrix
— Power supply terminal (+5V) (for analog system)
— Reference voltage (+5V) terminal (for A/D converter)
I Destination setting terminal "L": US, Canadian models, "H": AEP model
I Destination setting terminal Not used (fixed at "L" in this set)
I Disc table close detection switch (S480) input terminal "H": disc table is closed
I Disc table open detection switch (S481) input terminal "H": disc table is opened
I Internal status signal (sense signal) input from the CXA1992BR (IC501)
I Internal status signal (sense signal) input from the CXD2589Q (IC551)
I Subcode Q data (80 bit serial) input from the CXD2589Q (IC551)
— Ground terminal (for analog system)
I Subcode sync (S0+S1) detection signal input from the CXD2589Q (IC551)
O Digital muting on/off control signal output to the CXD2589Q (IC551) "H": muting on
O Subcode Q data (80 bit serial) reading clock signal output to the CXD2589Q (IC551)
I Power failure detection input terminal "L": power failure, "H": power on
O Buzzer sound drive signal output terminal
O Serial data transfer clock signal output to the CXD2589Q (IC551)
O Serial data latch pulse signal output to the CXD2589Q (IC551)
O Serial data output to the CXD2589Q (IC551)
O Muting on/off control signal output terminal "H": muting on Not used (pull down)
At initial mode: Setting terminal for the test mode (CD manual mode) "L" CD manual mode
I/O
At normal mode: Audio line muting on/off control signal output terminal "L": muting on
At initial mode: Setting terminal for the test mode (CD auto mode) "L": CD auto mode
I/O At normal mode: Power on/off control signal output for the CD +5V power supply
"L": CD power on
O Power on/off control signal output for the radio +5V power supply "L": radio power on
O PLL serial data output to the FM/AM PLL (IC51)
O PLL serial data transfer clock signal output to the FM/AM PLL (IC51)
O PLL serial data latch pulse signal output to the FM/AM PLL (IC51)
O Front side speaker on/off control signal output terminal "H": speaker on
O Shift clock output of the main system clock (4.194 MHz) "H" active Not used (pull down)
O Shift clock output of the main system clock (4.194 MHz) "H" active Not used (pull down)
System reset signal input from the reset signal generator (IC402) "L": reset
I
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
O Main system clock output terminal (4.194 MHz)
I Main system clock input terminal (4.194 MHz)
Description
Not used (pull down)
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