Daewoo DVDP485, Service Manual

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CT908
PRELIMINARY, SUBJECT TO CHANGE WITHOUT NOTICE CTK CONFIDENTIAL, NO DISCLOSURE
The above information is the exclusive intellectual property of Cheertek Inc. and shall not be disclosed, distributed or reproduced without permission from Cheertek Inc.
Copyright (C) 2003 Cheertek Inc. All Rights Reserved.
GPB7/TRAYPW
M
I/O General purpose IO bus B bit 7 default in input state/
Tray PWM control output. GPB7 could be specifically
used as TRAYOPEN, tray-open control output; GPB7
by default
DVD[7]
GPB8/SMB I/O General purpose IO bus B bit 8, initial in input state
/Stepping motor PWM output B; GPB8 by default
D_ERROR
GPB9/SDEN I/O General purpose IO bus B bit 9, bi-directional / Serial
data enable of RF-Amp, output; GPB9 by default
D_REQ
GPB10/SDATA I/O General purpose IO bus B bit 10, bi-directional / Serial
data connecting with RF-Amp, bi-directional; GPB10
by default
D_ACK
GBP11/SCLK I/O General purpose IO bus B bit 11, bi-directional / Serial
clock output to RF-Amp; GPB11 by default
D_STC
SMS[3:0]/PD[3:0] I/O SMS[3:0] are for testing use only /digital video pixel
data bits[3:0] output; SMS[3:0] by default
SMS0: CDCLK
SMS1: CDSD
SMS2: CDWS
SMS3: C2PO
4.6.1 DVD/CD Input Alternative Mode
This mode allows CT908 to receive bitstream from external front end devices, such as a DVD/CD servo/channel
processor. Mode selection is achieved via programming the EMU_900 bit of EMUCR (indexed 0x8f).
Pin name Type Description
DVD[7:0] I Parallel DVD data bus
D_ERROR I Error occurred signal in DVD Interface.
D_STC I Parallel DVD Data Strobe/Clock
D_SYN I DVD sector start indicator
D_ACK I Parallel DVD data acknowledge.
D_REQ O Request Parallel DVD data; Polarity is programmable
C2PO I CD data byte erasure flag
CDCLK I CD bit clock input