Sony SRF-PSY04, Руководство по обслуживанию

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4-4. IC PIN FUNCTION DESCRIPTION
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Pin No. Pin Name I/O Description
1 PB2 I
Key return signal input for the key matrix
2 to 5 PC0 to PC3 O
Key scan signal output for the key matrix
6 BEEP O
Beep sound drive signal output terminal
7 BAND O
FM/AM band selection signal output terminal “L”: FM, “H”: AM
8 BCHK —
Not used (open)
9 POWER O
Power on/off control signal output for the radio system power supply “H”: power on
10 MUTE O
Muting on/off control signal output to the headphone amplifier (IC2) “L”: muting on
11 CE I
Power failure detection signal input from the voltage detect (IC102) Normally: “H”
12 XOUT O
System clock output terminal (75 kHz)
13 XIN I
System clock input terminal (75 kHz)
14 VDD —
Power supply terminal (+3V)
15 GND —
Ground terminal
16 EO O
PLL error signal output terminal
17 VREG —
Power supply terminal (connected to the coupling capacitor)
18 VCOH I
FM VCO input terminal
19 VCOL I
AM VCO input terminal
20 to 28 LCD8 to LCD0 O
Segment drive signal output to the liquid crystal display (LCD101)
29 to 32 COM3 to COM0 O
Common drive signal output to the liquid crystal display (LCD101)
33 VLCD1 —
34 C1 —
35 C0 —
36 VLCD0 —
37, 38 PB0, PB1 I
Key return signal input for the key matrix
KEY BOARD IC101
µ
PD17015GS-520-GJG
(SYSTEM CONTROLLER, LIQUID CRYSTAL DISPLAY DRIVER, KEY CONTROL)
Terminal for doubler circuit capacitor connection to develop liquid crystal display drive voltage