ICF-M770L/M770S/M770SL
14
14
• Waveforms
– KEY Board –
1
Q106 (Base), Q111 (Collector)
3
IC104
wf
(XOUT)
250 mVp-p
380 ns
5.6 Vp-p
380 ns
1.7 Vp-p
13.3
µ
s
5-7.
IC PIN FUNCTION DESCRIPTION
2
Q106 (Collector)
•
KEY BOARD IC104
µ
PD17027GB-036-1A7
Pin No.
Pin Name
I/O
Description
1
KS0
O
Key source signal output
2
MUTE
O
Muting on/off control signal output “L”: muting on
3
BPF
O
Band selection signal output “L”: SW/MW/LW, “H”: FM
Used for the ICF-M770S/770SL (ICF-M770L: Not used)
4
(MW/LW)/SW
O
Band selection signal output “L”: MW/LW, “H”: SW
5
POWER
O
Power on/off control signal output for the tuner section “H”: radio power on
6 to 9
KS1 to KS4
O
Key source signal output
10 to 13
KR0 to KR3
I
Key return signal input
14
TUNED
I
Tuning detection signal input “L”: tuned
15
AC DET
I
AC voltage detection signal input “L”: AC detected
16
LIGHT
O
LED drive signal output of the liquid crystal display back light “H”: LED on
17
HOLD
O
HOLD switch input terminal “L”: hold on
18
GND
—
Ground terminal
19
EO
O
PLL frequency synthesizer charge pump output
20
VCOL
I
SW/MW/LW VCO input terminal
21
VCOH
I
FM VCO input terminal
22
REG0
O
Voltage regulator output terminal for the PLL
23
VDD
—
Power supply terminal (+3V)
24
XOUT
O
System clock output terminal (75 kHz)
25
XIN
I
System clock input terminal (75 kHz)
26
REG1
O
Voltage regulator output terminal for the oscillator circuit
27
REGLCD0
—
Connection terminal of doubler circuit capacitor for liquid crystal display drive power supply
28
CAPLCD0
—
Connection terminal of doubler circuit capacitor
29
CAPLCD1
—
Connection terminal of doubler circuit capacitor
30
REGLCD1
—
Connection terminal of doubler circuit capacitor for liquid crystal display drive power supply
31 to 34
COM0 to COM3
O
Common drive signal output to the liquid crystal display
35 to 47
LCD0 to LCD12
O
Segment drive signal output to the liquid crystal display
48, 49
LCD13, LCD14
O
Segment drive signal output to the liquid crystal display Not used
50
VDET1
I
Voltage detection signal input “L”: 2.5V or less
51
CEDET
I
Voltage detection signal input “L”: 2.5V or less
52
BEEP
O
Beep sound drive signal output
53
VDET2
I
Voltage detection signal input “L”: 2.9V or less
54
INITIAL1
I
Model setting input terminal “L”: ICF-M770L, “H”: ICF-M770S/M770SL
55
INITIAL2
I
Model setting input terminal “L”: ICF-M770L/M770S, “H”: ICF-M770SL
56
AM/(FM/TV)
O
Band selection signal output “L”: FM, “H”: SW/MW/LW
(SYSTEM CONTROLLER, LIQUID CRYSTAL DISPLAY DRIVER, KEY CONTROL)
