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LC78681KE-L View Datasheet(PDF) - SANYO -> Panasonic

Part NameLC78681KE-L SANYO
SANYO -> Panasonic SANYO
DescriptionDigital Signal Processor for Compact Disc Players
LC78681KE-L Datasheet PDF : 24 Pages
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LC78681KE, 78681KE-L
9. Error flag output; Pin 45: EFLG, pin 49: FSX
The FSX signal is generated by dividing the crystal oscillator clock, and is a 7.35 kHz frame synchronization signal.
The error correction state for each frame is output from EFLG. The playback OK/NG state can be easily determined
from the extent of the high level that appears here.
10. Subcode P, Q, and R to W output circuit; Pin 46: PW, pin 44: SBSY, pin 47: SFSY, pin 48: SBCK
PW is the subcode signal output pin, and all the codes P, Q, and R to W can be read out by sending eight clocks to
the SBCK pin within 136 µs after the fall of SFSY. The signal that appears on the PW pin changes on the falling
edge of SBCK. If a clock is not applied to SBCK, the P code will be output from PW. SFSY is a signal that is output
for each subcode frame cycle, and the falling edge of this signal indicates standby for the output of the subcode
symbol (P to W). Subcode data P is output on the fall of this signal.
SBSY is a signal output for each subcode block. This signal goes high for the S0 and S1 synchronization signals. The
fall of this signal indicates the end of the subcode synchronization signals and the start of the data in the subcode
block. (EIAJ format)
11. Subcode Q output circuit; Pin 50: WRQ, pin 51: RWC, pin 52: SQOUT, pin 54: CQCK, pin 56: M/L, pin 62: CS
MSB
LSB
00001001
10001001
Command
ADDRESS FREE
ADDRESS 1
RES = low
Subcode Q can be read from the SQOUT pin by applying a clock to the CQCK pin.
No. 4969-16/24
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Overview
The LC78681KE and LC78681KE-L are signal processing and servo control CMOS LSIs for compact disk players, laser disk players, CD-V, CD-I and similar applications. These products provide a rich set of signal processing functions, including demodulation of the EFM signal from the optical pickup, de-interleaving, error detection and correction, and digital filter functions that can contribute to end product cost reduction. These LSIs also process servo system commands sent from a control microprocessor. They can be directly interfaced to a serial input DAC (such as the Sanyo LC78835K or LC78855K) that provides built-in dedicated digital filters.

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