Daewoo DVDP485 Service Manual page 24

PRELIMINARY, SUBJECT TO CHANGE WITHOUT NOTICE
4.6 RF/Servo/Motor Drive Interface Signals
Pin name
RFVT
RFIN
AVD33S
LE
FE
TE
RFENV
FS
SRVM
FODAC
TRDAC
AVSSS
SLPWM/SMA
SPDPWM
GPB[5:0]
SPDFG/GPB6
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Type Description
AI RF ADC top reference voltage input (1.4V)
AI RF signal input
AP 3.3v analog power supply for servo ADC/DAC
AI Lens error input
AI Focus error input
AI Tracking error input
AI RF envelope input
AI Focus sum input
AI ADC/DAC center reference voltage input (1.65V)
AO Focus control DAC output
AO Tracking control DAC output
AG Analog ground for servo ADC/DAC
I/O Sledge control PWM output/Stepping motor PWM
output A; SLPWM is default
O Spindle PWM control output
I/O General purpose IO bus B, default in input state.
Specifically, this bus is used as following definition:
GPB0: TRAYCLOSE, tray-close control output
GPB1: TRAYIN, tray in inside position input
GPB2: TRAYOUT, tray in outside position input
GPB3: SLHOME, sledge motor in home position input
GPB4: MTRSTBY, motor driver enable output
GPB5: LDON, RF-Amp enable output
I/O Spindle FG signal input/General purpose IO bus B bit 6
that could be specifically used as MOCTL, spindle
reverse rotation indication signal input; SPDFG by
default
CTK CONFIDENTIAL, NO DISCLOSURE
DVD/CD input
alternative
D_SYNC
DVD[5:0]
DVD[6]
Copyright (C) 2003 Cheertek Inc. All Rights Reserved.
CT908