Microcomputer's Terminal Description - Kenwood KDC-216S Service Manual

KDC-216S/2018

MICROCOMPUTER'S TERMINAL DESCRIPTION

Terminal Description
Pin Function
1 AV CONT
2 IC2 TYPE0
3 IC2 TYPE1
4 AVSS
5 M MUTEL
6 N.C
7 AVREF1
8 ILLUMI
9 L RES
10 PANEL
11 L DATAL
12 L DATAS
13 L CLK
14 N.C
15 N.C
16 CH-DATAC
17 CH-DATAH
18 CH-CLK
19 L CE
20 N.C
21 M RST
22 M STOP
23 MOSW
24 PLL SCL
25 AM+B
26 FM+B
27 M-SCL
28 DSI
29 LO/EJ
30 SW3
31 R DATA
32 R QUAL
33 VSS1
34 SD
35 IC2 SCL
36 M-SDA
37 PLL SDA
38 IC2 SDA
39 MUTE
40 N.C
41 AFC
42 CH-REQH
43 CH-CON
44 N.C
45 P MUTE
46 SVR
47 STBY
48 P CON
49 P ANT
50 BEEP
51 ACC DET
52 BU DET
53 N.C
4
I/O Description
O A/D converter reference voltage control output
I IC2 setting terminal
I IC2 setting terminal
- Ground connection terminal
I Muting request from the MICOM. of CD mecha.
O Not used
I D/A converter reference voltage input
O Illumination AVR ON/OFF control output
O Reset output to the LCD driver IC
I Panel open/close detection input
I Data input from the LCD driver IC
O Data output to the LCD driver IC
O Clock output to the LCD driver IC
O Not used
O Not used
I Data input from changers
O Data output to changers
I/O Clock input/output with changers
O CE output to the LCD driver IC
O Not used
O Reset output to the MICOM. of CD mecha.
O Stop request to the MICOM. of CD mecha.
O CD mechanism loading motor control output
O Clock output to the tuner pack
O AM+B control
O FM+B control
I/O Clock input/output with the MICOM. of CD mecha.
O DSI output
I/O CD mecha.Loading/Eject switching output
I Down & limit switch detection input
I Data input from RDS decoder
I Quality input from RDS decoder
- Ground connection terminal
I SD input from the tuner pack
O Clock output to the E-VOL. IC
I/O Data input/output with the MICOM. of CD mecha.
I/O Data input/output with the tuner pack
I/O Data input/output with the E-VOL. IC
O Mute control output
O Not used
O AFC control output
O Request output to changers
O Changer control
O Not used
O Power IC mute control
O Power lC reset terminal
O Power IC standby control output
O Power control
O Antenna control
O BEEP sound output
I ACC detection input
I Momentary power down detection input
O Not used
Processing Operation
"Hi": ON / "Lo": OFF
"Lo": Initial value
"Lo": Initial value
connected to GND
"Lo": Mute request
"Hi": AVR ON
"Lo": Reset
"Lo": Panel closed
"Hi": Active
"Lo": Reset
"Lo": Stop
"Hi": Loading & Eject / "Lo": other
"Hi": during AM reception
"Hi": during FM reception
"Hi": LED ON
"Lo": Loading / "Hi": Eject
"Hi": Chucking / "Lo": Pickup most inner position
connected to GND
"Hi": Station detected
"Hi": Mute ON / "Lo": Mute OFF
"Lo": during FM seek
"Lo": Request
"Lo": Standby / "Hi": ON
"Lo": Mute
When the momentary power down, after ACC
OFF/ON is detected and after POWER ON/
OFF, the output goes "Hi" temporarily.
"Hi": POWER ON mode
"Hi": POWER ON mode except ALL OFF mode
"Hi": during FM/AM reception
"Hi": ACC OFF / "Lo": ACC ON
"Hi": When momentary power down detected
or BU OFF / "Lo": BU ON