– 12 –
5-1. IC PIN FUNCTION DESCRIPTION
SECTION 5
DIAGRAMS
• MAIN BOARD IC401 µPD17015GS-545-GJG-E1 (SYSTEM CONTROLLER, LCD DRIVER)
Pin No. Pin Name I/O Function
1 KEYIN3 I
Key return signal input terminal
2 KEYOUT1 O
3 KEYOUT2 O
Key strobe signal output terminal
4 KEYOUT3 O
5 MUTE O
Muting on/off control signal output to the LA4582CM (IC301) “L”: muting on
6 BEEP/INIT O
Buzzer sound drive signal output terminal
7SDI
Station detector detect signal input from the TA2111F (IC1) SD is present at input of “L”
8 TAPEON I
Tape system power on/off monitor input terminal “H”: tape on
9 RADIOON O
Radio system power supply on/off control signal output “H”: radio on
10 BAND O
Band select signal output to the TA2111F (IC1) “H”: FM, “L”: AM (MW)
11 CE I
Power failure detection signal input terminal (fixed at “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 VCOFM I
FM VCO input terminal
19 VCOAM I
AM (MW) VCO input terminal
20 LCD8 O
21 LCD7 O
22 LCD6 O
23 LCD5 O
24 LCD4 O
Segment drive signal output to the liquid crystal display (LCD401)
25 LCD3 O
26 LCD2 O
27 LCD1 O
28 LCD0 O
29 COM3 O
30 COM2 O
31 COM1 O
32 COM0 O
33 VLCD1 —
34 CAP1 —
35 CAP0 —
36 VLCD0 —
37 KEYIN1 I
Key return signal input terminal
38 KEYIN2 I
Key return signal input terminal
Terminal for doubler circuit capacitor connection to develop liquid crystal display drive
voltage
Common drive signal output to the liquid crystal display (LCD401)
To Next Page
Loading...
Need help?
General
