LC78624E Datasheet, PDF (9/27 Pages) Sanyo Semicon Device – Compact Disc Player DSP

LC78624E
3. 1/2 VCO Monitor; Pin 21: PCK
PCK is a monitor pin that outputs an average frequency of 4.3218 MHz, which is divided by two from the VCO
frequency.
4. Synchronization Detection Monitor; Pin 22: FSEQ
Pin 22 goes high when the frame synchronization (a positive polarity synchronization signal) from the EFM signal
read in by PCK and the timing generated by the counter (the interpolation synchronization signal) agree. This pin is
thus a synchronization detection monitor. (It is held high for a single frame.)
5. Servo Command Function; Pin 54: RWC, pin 56: COIN, pin 57: CQCK
Commands can be executed by setting RWC high and inputting commands to the COIN pin in synchronization with
the CQCK clock. Note that commands are executed on the falling edge of RWC.
Focus start
Track jump
Muting control
Disk motor control
Miscellaneous control
One-byte commands
Track check
Two-byte command (RWC set twice)
General-purpose I/O, E/D Two-byte commands (RWC set once)
• One-byte commands
• Two-byte commands (RWC set twice : For track checking)
A09902
A09903
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