Microcomputer's Terminal Description - Kenwood KDC-W8534 Service Manual

KDC-W8534/W8534Y
KDC-X790
Ref. No.
Q3,5,6 Level shift (3.3V-5V) transistor with 2 elements
Q7 Level shift (3.3V-5V) transistor
Q8 APC (Auto Power Control) transistor
Transistor for preceding beam delaying SW during
Q9,10
non-search
Q11 A5V power supply constant circuit FET
Q12,13 SW8V SW transistor
Q14,15 SDRAM 3.3V power supply SW transistor
UPD63712GC built-in resetting terminal static protection
D2
diode
D3 Protection diode for pick-up laser diode
D4,D5 Diode for securing audio L-R reference voltage
Diode for control terminal's "L" confirmation for IC20
D6
and IC21

MICROCOMPUTER'S TERMINAL DESCRIPTION

SYSTEM MICROCOMPUTER : 30625MGPA78GP/30625MWPA79GP (X34 : IC102)
Pin No. Pin Name
1 VREF
2 AVCC
3 LX DATA S
4 LX DATA M
5 LX CLK
6 WIRED REMO
7 LX MUTE
8 AUD SDA
9 AUD SEL
10 AUD SCL
10 DSP_SCL
11 DAC RST
11 NC
12 NC
13 BYTE
6
COMPONENTS DESCRIPTION
Application / Function
I/O Function
- Analog reference voltage
-
I Data from slave unit
O Data to slave unit
I/O LX-BUS clock
I External display remoter controller
I Mute request from slave unit
O E-VOL data
O E-VOL control
O E-VOL clock
O DSP clock output terminal
O DAC reset
O Not used
- Not used
- GND
Operation / Condition / Compatibility
SDRAM power supply is turned off when /CSRST is "L".
Processing Operation
H : MUTE ON, L : MUTE OFF
SPI communication
SPI communication
SPI communication
SPI communication
L : DAC RESET
L-output for models without DSP