Kenwood GX-204KE Service Manual page 11

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MICROCOMPUTER'S TERMINAL DESCRIPTION
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PANEL (HEATER CONTROL) MICROCOMPUTER: MB89537A1010E (X34-405: IC1)
Pin No. Pin Name
1 SH_DATA_H
2 SH_DATA_S
3 MOD2
4 TYPE1
5 TYPE2
6 TYPE3
7~11 NC
12 AVCC
13 AVR
14 AVSS
15 NC
16 ACC_DET
17~19 NC
20 RST
TE
21 MD0
L 13942296513
22 MD1
23 X0
24 X1
25 VSS
26,27 NC
28 HTR
29 BRIGHT
30 FLASH_MOD
31 R-DEF
31 P22
32 F-DEF
33 KEY_DET
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34 ENC_L3
35 ENC_L2
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36 ENC_L1
37 ENC_R3
I/O Application
HTR-C µ-com → System µ-com data output
O
System µ-com → HTR-C µ-com data output
I
Memory access mode setting input terminal
I
for when FLASH
I Destination setting
I Destination setting
I Destination setting
O Not used
- A/D converter power supply terminal
- A/D converter standard voltage input terminal
- A/D converter power supply terminal
I Not used
I ACC detection
I Not used
- Reset input terminal
- Input terminal for memory access mode setting
- Input terminal for memory access mode setting
- Oscillator connection terminal
- Oscillator connection terminal
- Power supply terminal
O Not used
O Terminal for determining bright terminal valid/invalid
O Output terminal for bright information from vehicle
I Input terminal for FLASH writing setting
O Rear DEF indicator control terminal
I Input terminal for FLASH writing setting
O Front DEF indicator control terminal
O Panel key operation check
I Rotary encoder (left) pulse count input terminal
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y
I Rotary encoder (left) pulse count input terminal
i
I Rotary encoder (left) pulse count input terminal
I Rotary encoder (right) pulse count input terminal
2 9
8
Processing Operation Description
Communication speed: 4800bps
Communication speed: 4800bps
Always L input
4V or higher: Left-hand steering,
2V or lower: Right-hand steering
4V or higher: SINGLE, 2V or lower: DUAL
4V or higher: 15~29°C, 2V or lower: 18~32°C
Output L fixed
Input fixed
L: ACC ON, H: ACC OFF, Detected voltage: 8.9V
Input fixed
L: Reset
Q Q
H: When writing FLASH µ-com, L: Other
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H: When writing FLASH µ-com, L: Other
12.288MHz
12.288MHz
Output L fixed
Start operating when the heater control µ-com IGN
ON, and at the point when the air-conditioner data is
finalized at UART, ON. H: ON, L: OFF
At the point when the bright data is finalized at
UART, ON. H: ON, L: OFF
Always L input
LED luminance control by PWM control,
2 steps brightness, 4ms cycle PWM
H: When writing FLASH µ-com
LED luminance control by PWM control,
2 steps brightness, 4ms cycle PWM
When key or encoder is input, "H" is output at 100ms
(in test mode only)
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GX204KEF2/KHF2/LEF2
GX204REF2/SEF2
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0 5 8 2 9 9 4 2 8
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