3-12
/M -RESET signal is output from IC901 when power is on, so IC501 is initialized.
And those(IC901 and IC501) communicate each other through TXDO,RXDO, SCKO signals
Waveforms display each signal when power on and after power on
IC901
pin64
IC901
pin1
IC901
pin18
IC901
pin19
IC901
pin64
IC901
pin1
IC901
pin18
IC901
pin19
The waveform when power is on
The waveform after power on
FE signal becomes like the waveform 2, in case of DVD dual layer disc since the laser
beam is reflected on both layer 0 and layer 1.
FDO
FE
FDO
layer0
Magnifying A
FE
A waveforms 1. FDO and FE when to play DVD9
A waveforms 2. Magnifying ‘A’
A
layer1
22. FDO and FE for DVD9 (Dual disc)
21. Signals for Front micom