Kenwood KDC-MP225 Service Manual page 8

KDC-MP225,MP4026/G
KDC-W4527/G/GY/Y,W427Y
MICROCOMPUTER'S TERMINAL DESCRIPTION
CD SIGNAL MICROPROCESSOR : UPD63712GC (X32 : IC2)
Pin No. Pin Name
1 VREFL
2 AVSS
3 AVCC
4 NC
5 20RST
6 20ACK
7 20STBY
8,9 NC
10 20INT
11 FOGUP
12 LZM
13 RZM
14,15 NC
16 20CS
17 20LP
18 20TXD0
19 20RXD0
20 20SCLK0
21 DSPTXD1
22 DSPRXD1
23 DSPSCLK1
24 AM0
25 DVCC
26 X2
27 DVSS
28 X1
29 AM1
30 RESET
31,32 NC
33,34 EMU0,1
35 DSPSTB
36 DSPA0
37 DSPRST
38 DSPINT
39 /DAC RESET
40 SEARCH
41 LOE/LIM_SW
42~45 NC
46 PONE5
47 PONE2.5
8
I/O
I Reference voltage input terminal
- GND for ADC
- Power supply for ADC (BU3.3V)
O NC (OPEN)
O Reset control output terminal (for decoder)
I Acknowledge signal input terminal (for decoder)
O Standby control (for decoder)
O NC (OPEN)
I Interrupt signal input terminal (for decoder)
I Interrupt for focus gain up control signal
I 0 bit muting detect (Lch)
I 0 bit muting detect (Rch)
O NC
O Chip select signal output terminal (for decoder)
O Latch pules signal output terminal (for decoder)
I/O Serial data signal output terminal (for decoder)
I Serial data signal input terminal (for decoder)
O Serial data clock output terminal (for decoder)
O Serial data signal output terminal (for DSP)
I Serial data signal input terminal (for DSP)
O Serial data clock output terminal (for DSP)
I Select for ROM mode H : NORMAL, L : External ROM mode
- BU3.3V
O Oscillator (16MHz)
- GND
I Oscillator (16MHz)
I BU3.3V
I Reset terminal L : RESET, H : NORMAL
O NC
O NC
O Data strobe signal output terminal
O Command, parameter select signal
O Reset control output terminal (for DSP)
I Interrupt signal input terminal (for DSP)
O Reset signal output terminal (for DSP)
O Search condition output terminal
I SLT SW detect input terminal
O NC (OPEN)
O +5V AVR control terminal (for VIDEO)
O +2.5V AVR control terminal (for VIDEO)
Description / Processing Operation
L : RESET, H : NORMAL
H : STAND BY, L : NORMAL
H : Focus gain UP, L : NORMAL
L : MUTE OFF, H : MUTE ON
L : MUTE OFF, H : MUTE ON
H : Parameter, L : Command
H : Interrupt
L : RESET, H : NORMAL
H : Search, L : NORMAL
H : Inside
H : Power ON
H : Power ON