IC DESCRIPTION
IC, UPD780228GF
Pin No.
Pin Name
I/O
________________
1
K-SCAN
O
Scan output to diode input (Active "L").
2
O-PLL-CE
O
Tuner PLL chip enable output.
3
O-DATA (M)
O
Sound CTRL, PLL, DOLBY PROLOGIC or DSP, AC-3 VOL, GEQ. Data output.
__________________
4
TUNE/IFC
I
Tuner TUNE/IFC detection input.
5
O-STB (M)
O
Sound CTRL, KEYCON strobe output.
6
O-MUTE
O
System mute ON/OFF output.
7
O-CLK (M)
O
Sound CTRL, PLL, DOLBY PROLOGIC or DSP, AC-3 VOL, GEQ. Clock output.
8
O-OSD (CE)
O
OSD chip enable output.
9
/I-SYNC-DET
O
System power supply. ON/OFF output.
10
O-PRO-CE/O-DSP-CE
O
DOLBY PROLOGIC or DSP chip enable output.
11
—
—
Not used.
12
TM-BASE
I
Reference clock input for watch.
13
—
O
IC101. Strobe output from shift register (1).
14-16
—
—
Not used.
17
IC
—
GND.
18
VSS
—
GND.
19
VDD
—
Power supply pin.
20, 21
—
—
Not used.
______
22
CS
O
DOLBY digital (AC-3) control. CS output.
23
SCK
O
DOLBY digital (AC-3) control. Clock output.
24
SI
O
DOLBY digital (AC-3) control. Data output.
25
SO
I
DOLBY digital (AC-3) control. Data input.
26
SDA
I
CODEC IC (CS4226) control. Data output.
______________
27
ADO/CS
O
CODEC IC (CS4226) control. CS output.
28
I-RDS-CLK
I
RDS clock input (external interrupt).
29
I-RDS-DATA
I
RDS data input.
_____________
30
RESET
—
Reset.
31
O-CONT.1
O
Master VOL control output for SL/SR.
Master VOL control output for center/SUB-woofer (TRIM control output for center/
32
O-CONT.2
O
SUB-woofer).
33
OSD-CLK
O
OSD clock output.
___________
34
I-RMC
I
Remote control input.
35
OSD-DATA
O
OSD data output.
36
C-SHIFT
O
Microprocessor clock shift output (Active "H").
37
VDD1
—
Power supply pin.
38
X1
—
Connected to 5.76MHz oscillator.
39
X2
—
Connected to 5.76MHz oscillator.
40
VSS1
—
GND.
41
AVDD
—
Power supply pin.
____________
42
HOLD
I
System power supply voltage monitoring. AD input.
43
I-RE-VOL
I
Rotary encoder (VOL). AD input.
All manuals and user guides at all-guides.com
Description
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41
Pin No.
Pin Name
I/O
44
I-SYNC-DET/I-RDS-SIG
I
OSD sync. AD input. RDS tuning signal level. AD input.
45
I-JOG2
I
Rotary encoder (JOG2). AD input.
46
I-FU-JOG1
I
Function selector rotary encoder (JOG1). AD input.
47, 48
I-KEY2, I-KEY1
I
Key 2, 1. AD input.
49
I-MIC
I
Microphone signal level detector. AD input.
50
AVSS
—
ADND.
51
O-STB-31
O
GEQ IC chip enable output.
52
POWER-LED
O
Power LED ON/OFF output (Active "H").
53-64
P35-P24
O
FL segment output (P35-P24).
65
P23/I-AM10K
O
FL segment output (P23)/supporting AM step initialization 10 kHz.
66, 67
P22/I-VF.KC.EC
I/O
FL segment output (P22, P21)/supporting VF, key control, ECHO. Diode input.
68
P20/I-AC3
I/O
FL segment output (P20)/supporting AC-3. Diode input.
69-73
P19-O-P15
O
FL segment output (P19-P15).
___________________
74
P14/I-STEREO
I/O
FL segment output (P14). Turner/stereo detection input (stereo at "L").
___________________
75
P13/I-HPMUTE
I/O
FL segment output (P13). Headphones insertion detection input (HP insertion at "L").
76-78
P12-P10
O
FL segment output (P12-P10).
79
VDD2
—
Power supply pin.
80
-VFL
—
– Voltage.
81-89
P9-P1
O
FL segment output (P9-P1).
90-100
G11-G1
O
FL grid output (G11-G1).
Description
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42