Microcomputer's Terminal Description - Kenwood KDC-3047M Service Manual

KDC-3047M/MP1046/MP145/MP145CR/MP146/MP2046
/MP245/MP246AM/MP246G/MP246S/MP3046

MICROCOMPUTER'S TERMINAL DESCRIPTION

● SYSTEM μ-COM : IC1 on X34- (ELECTRIC UNIT)
Pin No. Pin Name
1,2 NC
3 PON CD
4,5 NC
6 REMO
7 NC
8 BYTE
9 CNVSS
10 XCIN
11 XCOUT
12 RESET
13 XOUT
14 VSS
15 XIN
16 VCC1
17 NC
18 CD CCE
19 CD PIO0
20 PANEL DET
21 CD DRIVE MUTE
22 CD EJECT
23 CD LOAD
24 CD REST SW
25 CD MUTE
26 CD SRAM STB
27 CD MRST
28 BEEP
29 TUN SCL
30 TUN SDA
31 VFD SYS DATA
32 VFD PAN DATA
33 VFD CLK
34 VFD BLK
35 CD SI
36 CD SO
37 CD CLK
38~40 NC
41 EPM
41 ROMCOR DET
4
I/O Application
- Not used
O CD mechanism power supply control
- Not used
I Remote control signal input
- Not used
I Memory extension bus width setting
I VSS for fl ash ROM connector
- 32.768kHz
- 32.768kHz
-
- 16.0MHz
-
- 16.0MHz
-
- Not used
O CD mechanism chip enable
Communication request from mecha-
I
nism DSP
I Panel communication detection
O Motor driver mute output
O LOAD/EJECT control
O LOAD/EJECT control
I CD inner circumference detection
I CD mute request
O 1M-bit-SRAM standby
O CD mechanism reset
O Beep output
I/O Tuner I2C clock output
I/O Tuner I2C data input/output
O VFD data output
I VFD data input
O VFD clock output
O VFD data blanking output
O CD mechanism serial output
I CD mechanism serial input
O Serial clock output
O Not used
I Flash ROM EPM input
I E2PROM writing request
Truth Value
Processing / Operation / Description
Table
Output L fi xed
H: Power supply ON
Output L fi xed
Detects pulse width
Output L fi xed
Connects to VSS
Connects to VSS (Pull-down), H: Rewritable
L: Reset
Output L fi xed
H: Data request
H: No panel, L: Panel found
H: Mute (Output OFF), L: Output ON
q Refer to the truth value table
q Refer to the truth value table
L: Inner circumference detection
L: Mute request
L: SRAM standby
H: Normal, L: Reset
2kHz / 1kHz
125kHz
H: Reset cancelled, L: Reset, 11 minutes after momen-
tary power-down or panel detached or ACC OFF: L
f=1MHz
Output L fi xed
L: Rewritable
H: writing