Data Stream; Input Clock To Ic201 - LG GoldStar DVD5185 Service Manual

17. DATA STREAM

1. In case MPEG DECODER requires DATA for playing , MPEG requests data for DSP by sending
DATAREQ signal to DSP.
2. DVD DATA0-7 are output at the rising edge of DATACLK
3. During DATACLK Cycle, DATAENV is output to confirm whether DATA is valid or not
4. DATAREQ is set to 0 if a BUFFER included in IC501 is full
DATAREQ(IC501 pin178 to IC201 pin176)
DATACLK(IC201 pin136 to IC501 pin183)
DATAENA(IC201 pin141 to IC501 pin179)
DVD-DATA0(IC201 pin172 to IC501 pin177)

18. Input Clock to IC201

The waveform and the block diagram as below show a clock input and output between IC201 and X201.
Clocks generated in X201 is output and input into pin79 and pin80 of IC201.
The clock frequency is 16.9344MHz.
79
R269
X201
C270
A diagram for a colck input of IC201
IC201
80
R270
C272
The waveform of DATA STREAM
IC 201
pin79
IC 201
pin80
The waveform of clock inputs to IC201
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