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参数资料
| 型号： | LC78631E |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP80 |
| 封装： | QFP-80 |
| 文件页数： | 17/34页 |
| 文件大小： | 502K |
| 代理商： | LC78631E |
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No. 5342-24/34
LC78631E
20. Digital output circuit; Pin 65: DOUT
This is an output pin for use with a digital audio interface. Data is output in the EIAJ format. This signal has been
processed by the interpolation and muting circuits. This pin has a built-in driver circuit and can directly drive a
transformer.
The digital OUT pin can be locked at the low level by issuing a DOUT OFF command.
The UBIT information in the DOUT data can be locked at zero by issuing a UBIT OFF command.
The DOUT data can be switched to data to which interpolation and muting have not been applied by issuing a CD-
ROM XA command.
21. Antishock support; Pin 38: P0/DFCK, pin 39: P1/DFIN, pin 40: P2, pin 41: P3/DFLR, pin 42: LRSY, pin 43: CK2,
pin 44: ROMXA, pin 45: C2F
Antishock mode is a mode in which antishock processing is applied to data that has been output once. That data is
returned and output once again as an audio playback signal. It is also possible to use only the audio playback block
(the attenuator, digital filter, and D/A converter circuits) and thus share the audio playback block with other systems
by synchronizing the other system with the LC78631E clock.
The signals from the ROMXA pin can be output to an antishock LSI (the Sanyo LC89151) and re-input the signals
output by the antishock LSI to the LC78631E P1/DFIN pin. These signals are then processed by the attenuator,
digital filters, and D/A converter circuits and output as audio signals. In this mode, the P2 pin switches the de-
emphasis filter on and off. When P2 is high, the de-emphasis filter will be on.
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, digital filter, and D/A converter circuits) must
operate at normal speed. This means that the control microprocessor must issue both the antishock on command
($6C) as well as the DF normal speed on command ($6F).
Code
Command
RES = low
$42
DOUT ON
q
$43
DOUT OFF
$40
UBIT ON
q
$41
UBIT OFF
Code
Command
RES = low
$6C
ANTISHOCK ON
$6B
ANTISHOCK OFF
q
$6F
DF NORMAL SPEED ON (only in antishock mode)
$6E
DF NORMAL SPEED OFF (only in antishock mode)
q
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相关代理商/技术参数 |
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| LC78637E-E | 制造商:ON Semiconductor 功能描述: |
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