– 23 –
MAIN BOARD IC301
µ
PD780016YGF-015-3BA (MASTER CONTROLLER)
Pin No.
Pin Name
I/O
Function
1
TA-MUTE
O
Line mute control signal output terminal “L”: mute on
2
DBFB-H/L
O
DBFB normal/high selection signal output terminal “L”: DBFB high, “H”: DBFB low
3
427-LAT
O
Serial data latch pulse output to the electrical volume (IC201)
4
K-CON-LAT
O
Serial data latch pulse output to the key control (IC1401)
5
K-CON-ON
O
On/off selection signal output of the key control circuit “L”: on
6
F-RELAY
O
Relay drive signal output for the main speaker (front speaker) “H”: on
7
R-RELAY
O
Relay drive signal output terminal Not used (open)
8
PL-RELAY
O
Relay drive signal output terminal Not used (open)
9
TEST
I
Connected to ground
10
X2
O
Main system clock output terminal (5 MHz)
11
X1
I
Main system clock input terminal (5 MHz)
12
VDD
—
Power supply terminal (+5V)
13
XT2
O
Sub system clock output terminal (32.768 kHz)
14
XT1
I
Sub system clock input terminal (32.768 kHz)
15
RESET
I
System reset signal input from the reset signal generator (IC302)
“L ” : reset
For several
hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
16
(INT/IN)
I
Connected to ground
17
(INT/IN/OUT)
I
Connected to ground
18
SCOR
O
Subcode sync (S0+S1) detection signal input terminal Not used (fixed at “L”)
19
SOFT-TEST
O
Output terminal for the software test (open)
20
AC-CUT
I
AC off detection signal input from the reset signal generator (IC302)
21
RDS-INT
I
Serial data reading clock signal input for the radio data system Not used (fixed at “L”)
22
RDS-DATA
I
Serial data input for the radio data system Not used (open)
23
VDD
—
Power supply terminal (+5V)
24
AVDD
—
Power supply terminal (+5V) (for A/D conversion)
25
ADJ
I
Setting terminal for the test Normally: “H”
26
A-SHUT
I
Shut off detection signal input from the deck-A reel pulse detector (Q1001)
27
B-SHUT
I
Shut off detection signal input from the deck-B reel pulse detector (Q1002)
28
B-HALF
I
Detection input from the deck-B half detect switch (S1007)
29
CLK-CHECK
I
Not used (fixed at “L”)
30
SPEC-IN
I
Setting terminal for the version
31
ADJ2
I
Setting terminal for the test Normally: “L”
32
DEMO-MODE
I
Setting terminal for the demonstration H/L Fixed at “L”
33
AVSS
—
Ground terminal (for A/D conversion)
34
SQ-DATA-IN
I
Sub-code Q data input terminal Not used (fixed at “L”)
35
—
—
Not used (open)
36
D.OUT ON/OFF
O
Power on/off selection signal output for the CD digital out optical “H”: power on
Not used (open)
37
SW-ON/OFF
O
Not used (open)
38
FUNC1
I
Setting terminal for the function 1 Fixed at “L”
39
FUNC2
I
Setting terminal for the function 2 Fixed at “L”
40
VSS
—
Ground terminal
41
VOL-LAT
O
Serial data latch pulse output terminal Not used (open)
42
PL-LAT
O
Serial data latch pulse output terminal Not used (open)
43
COM-DIN
I
Serial data input terminal Not used (fixed at “L”)
6-1.
IC PIN FUNCTION DESCRIPTION
SECTION 6
DIAGRAMS
