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4-10.
IC PIN DESCRIPTION
@1C104 tuner system controller («PD78011GC-508-AB8)
Pin No.
Signal Name
1/0
Function
1
DO
I/O | Pin for data input/output from and to IC205 (CD system controller).
2
D1
V/O | Pin for data input/output from and to IC205 (CD system controller).
3
D2
1/O | Pin for data input/output from and to 1C205 (CD system controller).
4
D3
1/O | Pin for data input/output from and to C205 (CD system controller).
5
KEY REQ (CD)
O | Key data output timing. (CD)
6
CD BUSY Input
I__|
Input of CD state.
a
AU BUS Input
I__|
Audio bus input.
8
AU BUS Output
O_|
Audio bus output.
9
Vss
—
| Grounding pin.
10
Display Status (CD)
O _| Not used in this set (open).
11__
[Display Status (ST) | O | Not used in this set (open).
12
Not used in this set (open).
13
Not used in this set (open).
4
IFOK
O | Not used in this set (open).
15
AM/FM
O | FM/AM changeover output. "L" for FM, "H" for AM.
16
AM Forced Monaural | O | Not used in this set (open).
17
AM
O_|
Not used in this set (open).
18
STEREO
1_|
STEREO input.
19
SIGNAL
I_|
SIGNAL input.
20
DATA Input
I_|
Data input from IC21 (PLL).
21
DATA Output
O | Data output to IC21 (PLL),
22
CLOCK
O | CLOCK output to IC21 (PLL).
23
CE
O_|
CE output to IC21 (PLL).
24
Vss
— | Grounding pin.
25
Not used in this set (open).
26
Not used in this set (open).
27
LED (TUNING)
O | Tuner "+"/"—" key mode LED output.
28
LED (PRESET)
O | Tuner "+"/"—" key mode LED output.
29
Analog Bus Control
O | Analog bust control output to 1C102 (TC9215F-TP1).
30
POWER,
O_|
Power output. "L" for ON, "H" for OFF.
31
MUTE
O_|
Muting output. "L" for ON, "H" for OFF.
32
Not used in this set (open).
33
IF —50K
I | IF offset input.
34
IF +50K
I_|
IF offset input.
35
RESET
I__|
Reset input.
36
BACK UP
I | Backup input.
37
DPCLK (CD)
I_|
CD display data timing input.
38
CLOCK
O | CLOCK output to IC106 (MEMORY).
39
DATA
/O | Data input/output from and to IC106 (MEMORY).
40
Voo
—_|
Power pin (+5V).
41
X2
Main clock.
42
X1
I__|
Main clock (8.38MHz).
43
GND
— | Grounding pin.
—34—
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