System Μ-Com : Ic1 On X34- (Electric Unit); Microcomputer's Terminal Description - Kenwood KDC-3028 Service Manual

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MICROCOMPUTER'S TERMINAL DESCRIPTION

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SYSTEM µ-COM : IC1 on X34- (ELECTRIC UNIT)
Pin No. Pin Name
1 DCERR
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 VFD RST
12 VFD CE
13 ROTARY CCW
14 FLIP DET
15 PWIC BEEP
16 LX DATA S
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17 LX DATA M
18 LX CLK
19 NC
20 TUN ADJ
21 TUN SD
22 LX RST
23 LX CON
24 LX REQ M
25 AUD SDA
26 AUD SCL
27 PWIC STBY
28 VOL MUTE
29 PWIC MUTE
30 RDS AFSM
31 RESET2
32 NC
33 VSS1
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34 NC
35 ACC DET
36 BU DET
.
37 PON
38,39 PS2-2, PS2-1
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 FVD driver
O Data output to FVD driver
O Clock output to FVD driver
O Reset output to FVD driver
O Chip enable output to VFD driver
I Rotary encoder input
I 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 input
O Hard reset to slave unit
O Start-up request to slave unit
O Communication request to slave unit
I/O Tuner + volume I2C data input and output
I/O Tuner + volume I2C clock input and output
O Power IC standby output
O E-VOL mute output
O Power IC mute output
-
O Mute for reset
-
-
-
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I ACC detection
I Momentary power-down detection
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I/O SW5V/SW14V control
O Power supply control output
KDC-3028/328
2 9
8
TEL MUTE : Below 1V
Refer to "TUN TYPE" on the TRUTH TABLE
Refer to "TUN TYPE" on the TRUTH TABLE
Display OFF, Key reset, Panel opened : L
Display ON, Key scan : H
Panel released : H, Panel ON : L
Q Q
3 6 7 1 3 1 5
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
Output L
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ACC exists : L, ACC does not exist : H
BU exists : L, BU does not exist (Momentary power-down) : H
.
Power ON : L, Power OFF : Hi-Z
Refer to "POWER IC CONTROL" on the TRUTH TABLE
9 4 2 8
Processing Operation
0 5 8 2 9 9 4 2 8
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9 9
9 9
5