KDC-2021SA/SG
3
MICROCOMPUTER'S TERMINAL DESCRIPTION
SYSTEM MICROCOMPUTER uPD780058GC-XXX (IC1:X25)
Pin No.
Pin Name
I/O
Purpose
Processing in STBY Mode
1
PANEL
I
Panel detection
Hi-Z
2
8EJE SW *1
I
8 cm disk eject end detection switch
L, L when the 8 cm CD compatibility is not provided.
3
NC
O
Not used
L
4
AVss
-
GND potential (for A/D and D/A)
-
5
L-RST
O
LCD driver reset
H, L when the panel is detached or with 7-segment output.
6
L-CE
O
LCD driver chip enable
L, L is output when the panel is detached.
7
AVREF1
I
5V power supply (D/A converter reference voltage)
-
8
NC
I
Not used
Hi-Z
9
PLL-DATA
I/O
F/E (IC3) communication data
L
10
PLL-CLK
O
F/R (IC3) communication clock
L
11
L-DATAL
I
LCD driver communication data (LCD)
Hi-Z
12
L-DATAS
O
LCD driver communication data (SYSTEM)
L, L is output when the panel is detached.
13
L-CLK
O
LCD driver communication clock
H, L is output when the panel is detached.
14
R-DATA
I
RDS DATA
Hi-Z, L when RDS is not available.
15
R-QUAL
I
RDS QUAL
Hi-Z, L when RDS is not available.
16
CH-DATAC
I
5-wire communication data (CH)
Hi-Z, L when CH is not available.
17
CH-DATAH
O
5-wire communication data (HEAD)
L, L when CH is not available.
18
CH-CLK
I/O
5-wire communication clock
Hi-Z, L when CH is not available.
19
CH-REQH
O
5-wire CH request (HEAD)
H, L when CH is not available.
20
PLL-CE
O
F/E chip enable
L
21
AFS
O
Noise detection time constant switching
L
22
LO/DX
O
Local seek switching
L
23~26
NC
O
Not used
L
27
SD
I
Station detection
Hi-Z
28
CH-CONT
O
5-wire communication CH ON output
L, L when CH is not available.
29
TYPE REF
O
Destination type and servicing setting 5V output
L
30
TYPE2
I
Destination type setting
Hi-Z
31
TYPE1
I
Destination type setting
Hi-Z
32
TYPE0
I
Destination type setting
Hi-Z
33
Vss1
-
GND potential (for other parts than ports and analog circuitry)
-
34
IC2TYPE1
I
Servicing pin (SEL1), normally "L"
Hi-Z
35
IC2TYPE0
I
Servicing pin (SEL0), normally "L"
Hi-Z
36
DATA
I/O
IC2, CD mechanism and F/E communication data
L
37
CLK
O
IC2, CD mechanism and F/E communication clock
L
38
MUTE
O
Muting control output
L, 15 sec. after power OFF.
39
P-MUTE
O
PWR IC muting output
H, 15 sec. after power OFF.
40
SVR
O
SVR control output
L
41
P-STBY
O
PWR IC standby output
L
42
SW5V
O
SW5 control output
"H" in 10 sec. after power OFF.
43
B.U-DET
I
B.U. detection
Hi-Z
44
ACC-DET
I
ACC detection
Hi-Z
45,46
NC
O
Not used
L
47~49
PS1-0~PS1-2
O
Power supply IC AUD/P.CON/P.ANT SW
L
50
BEEP
O
Buzzer output
L
51,52
PS2-0,PS2-1
O
Power supply IC ILL/AM/FM SW
L
53
DSI
O
DSI control output
L, H/L when panel is detached. FIX output is L.
