Kenwood GX806EF2 Service Manual page 7

MICROCOMPUTER'S TERMINAL DESCRIPTION
Pin No. Pin Name I/O
90 SP_REQ_P
91 ACC_DET
92 OFF_REQ
93 BU_DET
94 SP_RST
95 SP_BKUP
96 R_CLK
97 CDX_SI
98 CDX_SO
99 CDX_CLK
100 SP_DATA_P
Panel Microcomputer : MB90561A-364 (X34-314 : IC1)
Pin No. Pin Name I/O
1~3 NC
4~6 KEY1~KEY3
7~11 NC
12 AVCC
13 AVR
14 AVSS
15 SP_DATA_S
16 SP_DATA_P
17 SP_REQ_P
18 SP_BKUP
19 MD0
20 SP_RST
21 MD1
22 MD2
23 X0
24 X1
25 VSS1
26 P00 I/O
Function
I Request from panel microcomputer
I ACC detection
I F-BUS OFF request
I BU detection
O Reset to panel microcomputer
Momentary power down detection
O
output to panel microcomputer
I RDS clock
I 6CD data input
O 6CD data output
I 6CD clock input
I Data output from panel microcomputer
Function
O
I Six division key reading
O
A/D converter power supply
A/D converter REF voltage input
A/D converter GND connection
I Data input from SYS_COM
O Data output to SYS_COM
O Request to SYS_COM
I Power down detection input from SYS_COM
I For FLASH ROM writing
I Reset input from SYS_COM
I For FLASH ROM writing
I For FLASH ROM writing
Microcomputer clock oscillator
Microcomputer clock oscillator
Current GND
Setting for FLASH ROM writing method
GX806EF2
Processing Operation Description
ON request : H
ACC ON : L, ACC OFF : H, Detection voltage : 8.5V
System OFF request : L
BU ON : L, BU OFF (During momentary power down) : H
Detection voltage : 8.5V
Normal : H, When reset : L (2 pulses), When communication
error occurs immediately after reset, then reset is triggered.
Momentary power down : L, Normal : H
RDS clock
SIO 250kHz
SIO 250kHz
SIO 250kHz
UART 19200bps
Processing Operation Description
Not Used
Key reading of analog voltage values
Not Used
VCC
SW_5V electrical potential
GND electrical potential
Communication speed : 19200bps with 30ms interval
Communication speed : 19200bps with 20ms interval
Generates pulse signal for triggering standby mode of SYS_COM.
After confirming on SP_REQ_S signal, output is stopped.
Momentary power down detection
H : Normal mode, L : FLASH ROM writing mode
4 cycle time L after H input, H input thereafter
H : Normal and FLASH ROM writing mode, L : No setting
H : FLASH ROM writing mode, L : Normal mode
4.0MHz
4.0MHz
GND electrical potential
L : Serial writing permission
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