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LC78621E Arkusz danych(PDF) 26 Page - Sanyo Semicon Device |
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LC78621E Arkusz danych(HTML) 26 Page - Sanyo Semicon Device |
26 / 34 page • The ASDACK (pin 38), ASDFIN (pin 39), ASDFIR (pin 40), and ASLRCK (pin 41) pins must be held low if this mode is not used. • It is possible to input the signals from the ROMXA (pin 44), C2F (pin 45), LRSY (pin 42), and CK2 (pin 43) pins to an antishock LSI (the Sanyo LC89151) and re-input the signals output by the antishock LSI to the ASDFIN (pin 39), ASLRCK (pin 41), and ASDACK (pin 38) pins. These signals are then processed by the attenuator, 8 × oversampling digital filter, and one-bit D/A converter circuits and output as audio signals. • In antishock systems, the signal-processing block must operate in double-speed playback mode for data output to the antishock LSI, and the audio playback block (the attenuator, 8 × oversampling digital filter, and one-bit D/A converter circuits) must operate at normal speed. This means that the control microprocessor must issue both the ANTIC on command (6CH) as well as the DF normal speed on command (6FH). • The ANTIC off command (6BH) clears antishock mode. 23. CONT Pin; Pin 73: CONT The CONT pin goes high when a CONT SET command is issued. 24. Clock Oscillator; Pin 77: XIN, pin 78: XOUT No. 5223-26/34 LC78621E MSB LSB Command RES = low 0 1 1 0 1 1 0 0 ANTIC ON 0 1 1 0 1 0 1 1 ANTIC OFF q q 0 1 1 0 1 1 1 1 DF NORMAL SPEED ON (only in antishock mode) 0 1 1 0 1 1 1 0 DF NORMAL SPEED OFF (only in antishock mode) q q MSB LSB Command RES = low 0 0 0 0 1 1 1 0 CONT SET Low 1 0 0 0 1 0 1 1 CONT AND CD-ROM XA RESET q q MSB LSB Command RES = low 1 0 0 0 1 1 1 0 OSC ON q q 1 0 0 0 1 1 0 1 OSC OFF 1 1 0 0 0 0 1 0 NORMAL-SPEED PLAYBACK q q 1 1 0 0 0 0 0 1 DOUBLE-SPEED PLAYBACK The clock that is used as the time base is generated by connecting a 16.9344 MHz oscillator element between these pins. The OSC OFF command turns off both the VCO and crystal oscillators. Double-speed playback can be specified by microprocessor command. |
Podobny numer części - LC78621E |
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Podobny opis - LC78621E |
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