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MICROCOMPUTER'S TERMINAL DESCRIPTION
SYSTEM µ-COM : IC1 on X34- (ELECTRIC UNIT)
Active
Pin No.
Pin Name
(H/L)
1
DC ERR
2
LINE MUTE
3
ROTARY CW
4
AVSS
5
TUN TYPE1
6
TUN TYPE2
7
AVREF1
8
VFD DATAF
9
VFD DATAS
10
VFD CLK
11
L
VFD RST
12
VFD CE
13
ROTARY CCW
14
L
TDF DET
15
PWIC BEEP
16
LX DATA S
17
LX DATA M
18
LX CLK
19
NC
20
L
TUN ADJ
21
TUN SD
22
H
LX RST
23
H
LX CON
24
LX REQ M
25
AUD SDA
26
AUD SCL
27
H
PWIC STBY
28
H
VOL MUTE
29
L
PWIC MUTE
30
TUN FANC OUT
31
RESET2
32
NC
33
VSS1
34
NC
35
L
ACC DET
I/O
Application
I
DC offset detection input
I
Phone detection
I
Rotary encoder input
-
I
E-VOL setting switch
I
E-VOL setting switch
-
I
Data input from VFD driver
O
Data output to VFD driver
O
Clock output to VFD driver
O
Reset output to VFD driver
O
Chip enable output to VFD driver
I
Rotary encoder input
I
TDF panel detection
O
Beep output
I
Data from slave unit
O
Data to slave unit
I/O
LX-BUS clock
-
I
For adjusting IC10
I
Tuner search stop output
O
Hard reset to slave unit
O
Start-up request to slave unit
O
Communication request to slave unit
I/O
Volume + tuner I2C data input and output
I/O
Volume + tuner I2C clock input and output
O
Power IC standby output
O
E-VOL mute output
O
Power IC mute output
Tuner block (inside the µ-com) check
O
O
Mute for reset
-
-
-
I
ACC detection
KDC-MP2028/MP228/MP3029
KDC-MP4029/MP4029G
Processing Operation
NAVI MUTE : Over 2.5V, TEL MUTE : Below 1V
Refer to "TUN TYPE" on the TRUTH TABLE
Refer to "TUN TYPE" on the TRUTH TABLE
Display OFF, Key reset, TDF panel OFF : L
Display ON, Key scan : H
TDF panel OFF : H, TDF panel ON : L
Adjustment=H, PS1-1,2=L, PS1-3=Hi-Z,
PS2-1,2=Hi-Z, TUN DATA, CLK=Hi-Z
H : Station exists, L : Station does not exist
H : Reset, L : Normal condition
H : Slave unit ON, L : Slave unit OFF
Power IC ON : H, Power IC OFF : L
L : Mute OFF, Hi-Z : Mute ON
Power OFF : L, Standby : L, Tel mute : L
OK : L, NG : H
Output L
ACC exists : L, ACC does not exist : H
5
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