Ic Pin Function Description - Sony ST-EX880 Service Manual

ST-EX880/MS717
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5-12. IC PIN FUNCTION DESCRIPTION

• MAIN BOARD IC201 µPD78016FGC-544-AB8 (SYSTEM CONTROLLER)
Pin No. Pin Name I/O
DATA 0 to
1 to 4 I/O Two-way data bus with the system control bus
DATA 3
5 IF+50 I
Fixed at "L" in this set
6 IF–50 O Fixed at "L" in this set
7, 8 GND —
Ground terminal
9 VSS —
Ground terminal
Power on/off control signal output for the +10V and +5V power supply
10 POWER O
"L": power on, "H": standby
11 MUTE O
Tuner muting on/off control signal output terminal "L": muting on
12 AC RELAY O Relay drive signal output for the AC on/off control "L": standby, "H": power on
13, 14 NC O
Not used (open)
15 AM MONO O AM forced monaural control signal output terminal "H": forced monaural Not used (open)
16 AM/FM O FM/AM selection signal output terminal Not used (open)
Intermediate frequency count effect signal output terminal "L": NG, "H": OK
17 IFNG O
Not used (open)
18 STEREO I Stereo detection signal input from the LA1835 (IC1) "L": stereo
19 SIGNAL I
FM/AM frequency detection signal input from the LA1835 (IC1) "L": tuned, "H": detuned
20 DATA IN I PLL serial data input from the FM/AM PLL (IC51)
21 DATA OUT O PLL serial data output to the FM/AM PLL (IC51)
22 CLOCK O
PLL serial data transfer clock signal output to the FM/AM PLL (IC51)
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L 1 3 9 4 2 2 9 6 5 1 3
23 CE O PLL serial chip enable signal output to the FM/AM PLL (IC51)
24 VSS — Ground terminal
25 SIRCS IN I
Sircs remote control signal input from the remote control receiver (IC902)
26 STAND BY O LED drive signal output for the STANDBY indicator Not used (open)
27 ONCE O
LED drive signal output for the ONCE indicator (D905) "L": LED on
28 DAILY O LED drive signal output for the DAILY indicator (D904) "L": LED on
29 REC O LED drive signal output for the REC indicator (D903) "L": LED on
30 SLEEP O
LED drive signal output for the SLEEP indicator (D902) "L": LED on
31 ENCORDER IN A I Jog dial pulse (A) input from the rotary encoder (S915) (for MULTI CONTROLLER)
32 ENCORDER IN B I Jog dial pulse (B) input from the rotary encoder (S915) (for MULTI CONTROLLER)
33 AUBUS IN I
Sircs remote control signal input for the audio bus
34 AUBUS OUT O Sircs remote control signal output for the audio bus
System reset signal input from the reset signal generator circuit "L": reset
35 RESET I
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
Serial data transfer clock signal input from the RDS decoder (IC302)
36 RDS CLK I
Used for the ST-EX880 (ST-MS717: fixed at "L")
37 CLOCK I/O
Bus data transfer/reading clock signal in/out terminal for the system control bus
38 BUSY I/O Busy signal in/out terminal for the system control bus
39 AC OFF I AC off detection signal input terminal "L": AC off
40 VDD —
Power supply terminal (+5V)
41 X2 O Main system clock output terminal (10 MHz)
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42 X1 I Main system clock input terminal (10 MHz)
43 GND IC (VPP) —
Ground terminal
44 XT2 O Sub system clock output terminal (32.768 kHz)
45 XT1 I
Sub system clock input terminal (32.768 kHz)
46 AVSS — Ground terminal (for A/D converter)
Function
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Pin No. Pin Name I/O
Key input terminal (A/D input) (S907 to S913)
47 KEY IN 1 I
ONCE, DAILY, REC, SLEEP, CLOCK/TIMER SET, ENTER/YES, MENU/NO keys input
Key input terminal (A/D input) (S901 to S906)
48 KEY IN 2 I
STEREO/MONO, BAND, PRESET, MANUAL, AUTO, DISPLAY keys input
49 KEY IN 3 I
Key input terminal (A/D input) (S914) I/u (power) key input
Serial data input from the RDS decoder (IC302)
50 RDS DATA I
Used for the ST-EX880 (ST-MS717: fixed at "L")
Input terminal for the destination setting
51 DESTINATION I
(Tourist model: fixed at "L", Except Tourist model: open)
52 DESTINATION I Input terminal for the destination setting (fixed at "L")
Input terminal for the destination setting
53 DESTINATION I
(Tourist model: open, Except Tourist model: fixed at "L")
54 DESTINATION I Input terminal for the destination setting (ST-EX880: open, ST-MS717: fixed at "L")
55 AVDD — Power supply terminal (+5V) (for A/D converter)
56 AVREF I
Reference voltage (+5V) input terminal (for A/D converter)
57 GND — Ground terminal
58 SDATA O
Serial data output to the fluorescent indicator tube driver (IC901)
59 SCK O
Serial data transfer clock signal output to the fluorescent indicator tube driver (IC901)
60 CS O Chip select signal output to the fluorescent indicator tube driver (IC901) "L" active
61 RESET O
Reset signal output to the fluorescent indicator tube driver (IC901) "L": reset
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62 ERRORS O Output terminal of the error monitor Not used (open)
3 7 6 3
63 CORRECTION O Output terminal of the correction monitor Not used (open)
64 RECEIVED O
Output terminal of the receive monitor Not used (open)
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9 9 8
Function
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