Microcomputer's Terminal Description - Kenwood DPX302 Service Manual

DPX302,DPX-MP2100
● CD PLAYER UNIT (X32-5920-04)
Ref. No. Application / Function
IC1 A3.3V regulator
IC2 Low pass fi lter
IC3 4ch BTL driver
IC4 Mechanism µ-com
IC5 BU3.3V regulator
IC6 D3.3V regulator
IC7 Audio DAC built-in servo DSP
IC11 Buffer IC
Q1 A3.3V discharge circuit
Q4 APC (Auto power control)
Q5,6 SW 5V
Q7,8 SW 8V
D1 APC (Auto power control)

MICROCOMPUTER'S TERMINAL DESCRIPTION

● SYSTEM µ-COM (X34: IC1)
Pin No. Pin Name
1 REMO
2 LX MUTE
3 AUD SDA
4 AUD SEL
5 AUD SCL
6 BYTE
7 CNVSS
8 XCIN
9 XCOUT
10 RESET
11 XOUT
12 VSS
13 XIN
14 VCC1
4
COMPONENTS DESCRIPTION
Power supply for audio 3.3V
Driving spindle motor and loading/ejection operation
Power supply for backup 3.3V
Digital 3.3V Power supply
MP3, WMA, and AAC compatible
Level shift
Adjusts current to be sent to laser
Protects the pick-up laser diode
Module I/O Application
EXTRA I Remote control signal input
LX M I MUTE request from slave unit
AUDIO O E-VOL data output terminal
AUDIO O E-VOL control terminal
AUDIO O E-VOL clock output terminal
µCOM -
µCOM -
µCOM I
µCOM I
µCOM -
µCOM -
µCOM -
µCOM - 12.0MHz
µCOM -
Operation / Condition / Compatibility
Truth
Processing Operation Description
value table
Detect pulse width
H: Mute ON, L: Mute OFF