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