Kenwood KDC 305 RG Service Manual

Page 4

KDC-305RG/3018R/3090R/A/G/YA/YG

MICROCOMPUTER'S TERMINAL DESCRIPTION

OTerminal Description

Pin Function I/O Description Processing Operation
1 AV CONT 0 A/D converter reference voltage control output Hi: ON / Lo: OFF
2 |C2 TYPEO I |C2 setting terminal Lo: Initial value
3 |C2 TYPE I |C2 setting terminal "Lo: Initial value
4 AVSS - Ground connection terminal connected to GND
5 M MUTEL l Muting request from the MICOM. of CD mecha. "Lo": Mute request
6 NC 0 Not used
7 AVREF1 l D/A converter reference voltage input
8 ILLUMI O Illumination AVR ON/OFF control output Hi: AVR ON
9 L RES 0 Reset output to the LCD driver IC "Lo: Reset
10 PANEL l Panel open/close detection input "Lo: Panel closed
11 L DATAL I Data input from the LCD driver IC
12 L DATA8 0 Data output to the LCD driver IC
13 L CLK O Clock output to the LCD driver IC
14 NC 0 Not used
15 NC 0 Not used
16 CH-DATAC | Data input from changers
17 CH-DATAH 0 Data output to changers
18 CH-CLK l/O Clock input/output with changers
19 L CE 0 CE output to the LCD driver lC Hi: Active
20 NC 0 Not used
21 M RST 0 Reset output to the MICOM. of CD mecha. Lo: Reset
22 M STOP 0 Stop request to the MICOM. of CD mecha. Lo: Stop
23 MOSW 0 CD mechanism loading motor control output "Hi: Loading & Eject / "Lo: other
24 PLL SOL O Clock output to the tuner pack
25 AM+B O AM+B control Hi: during AM reception
26 FM+B O FM+B control Hi": during FM reception
27 M-SCL l/O Clock input/output with the MICOM. of CD mechat
28 DSI O DSI output Hi: LED ON
29 LO/EJ l/O CD mecha.Loading/Eject switching output "Lo": Loading / Hi": Eject
30 SW3 | Down & limit switch detection input "Hi": Chucking/"Lo": Pickup most inner position
31 R DATA | Data inputfrom RDS decoder
32 Ft QUAL I Quality input from RDS decoder
33 VSS1 - Ground connection terminal connected to GND
34 SD | SD input from the tuner pack Hi: Station detected
35 |C2 SCL O Clock output to the E-VOL. IC
36 M»SDA l/O Data input/output with the MICOM. of CD mecha.
37 PLL SDA l/O Data input/output with the tuner pack
38 |C2 SDA l/O Data input/output with the E-VOL. IC
39 MUTE O Mute control output Hi: Mute ON / "Lo: Mute OFF
40 NC 0 Not used
41 AFC 0 AFC control output Lo": during FM seek
42 CH-REQH 0 Request output to changers "L0": Request
43 CH-CON O Changer control "Lo": Standby / Hi": ON
44 NC 0 Not used
45 P MUTE 0 Power IC mute control Lo": Mute
46 SVR 0 Power IC reset terminal When the momentary power down, after ACC
OFF/ON is detected and after POWER ON/
OFF, the output goes Hi" temporarily.
47 STBY 0 Power IC standby control output "Hi": POWER ON mode
48 P CON 0 Power control "Hi: POWER ON mode except ALL OFF mode
49 P ANT 0 Antenna control Hi: during FM/AM reception
50 BEEP O BEEP sound output
51 ACC DET | ACC detection input Hi: ACC OFF / "Lo: ACC ON
52 BU DET | Momentary power down detection input Hi: When momentary power down detected
or BU OFF / "Lo: BU ON
53 NC 0 Not used