Microcomputer's Terminal Description - Kenwood DPX-4020 Service Manual

MICROCOMPUTER'S TERMINAL DESCRIPTION

G SYSTEM µ-COM (IC1:X14-6710-XX) MN101C15FCP
Pin.No. Pin name I/O
1 VREF-
2 NC
3 FM_SD
4 F_REEL
5 R_REEL
6 NC
7 ACC_DET
8 SMALL
9 LINE MUTE
10 VREF+
11 VDD
12 X' Tal (8.38)
13 X' Tal (8.38)
14 VSS
15 XI
16 XO
17 MMOD
18 PN_MC_DATA
19 PN_SC_DATA
20 PN_MC_CLK
21 CH_DATAH
22 CH_DATAC
23 CH_CHCLK I/O
24 BEEP
25 RESET
26 CH_REQH
27 CH_CON1
28 CH_CON2
29 P_ANT
30 P_CON
31 BU_DET
32 CH_REQC
33 PN_SC_REQ
34 SEL1
35 SEL2
36 SDA I/O
37 NC
38 SCL
39 P_ON
40 LAMP
- Connected to GND.
I Not used. Connected to GND.
I FM SD input.
I Reel pulse (FWD) detection.
I Reel pulse (REV) detection.
I Not used. Connected to GND.
I Acc detection input.
I SMALL detection input.
I LINE MUTE detection input.
- A/D converter. Reference voltage input terminal.
- Main power input.
O Connected to main clock.
I Connected to main clock.
- Connected to GND.
I Connected to GND.
O Open.
I Connected to GND.
O Data output to panel micom.
I Data input from panel micom.
O Clock output to panel micom.
O Data output to CD-CH.
I Data input from CD-CH.
Previous bus : Data input from CD-CH. New bus : Data output to CD-CH.
O Beep output.
I System reset.
O Send request output to CD-CH.
- Operation control of CD-CH1.
- Operation control of CD-CH2.
- Power ANT control.
- External amplifier power control.
I Back up detection input.
I Send request input from CD-CH.
I Send request input from panel micom.
- IC2$ noise cancellation selection.
- IC2$ noise cancellation selection.
I2C data input/output.
- Not used. (Open)
O I2C clock output.
- Internal power control.
- Key illumination control.
Description
DPX-4020
Processing Operation
Hi-Z
Hi-Z
5