參數(shù)資料
型號(hào)： LC78628
廠商： Sanyo Electric Co.,Ltd.
元件分類： 數(shù)字信號(hào)處理
英文描述： 16-bit fixed point DSP with Flash
中文描述： 具有閃存的 16 位定點(diǎn) DSP
文件頁數(shù)： 27/40頁
文件大?。?/td> 241K
代理商： LC78628
No. 6329-27/40
LC78628E
Deemphasis Filter — Pin 32: EMPH
The HDCD filter block includes a built-in deemphasis filter so that music that is recorded with preemphasis applied can
be played back with deemphasis. The HDCD filter block can operate with its input taken from either the audio signal
read from a disc or from the audio signal input to the LRCKI, BCKI, and DATAI pins.
The EMPH pin in an I/O pin that provides two functions:
Monitor output for the preemphasis on/off bit for the audio signal being read out from the disc.
Input for a signal that controls deemphasis on/off for the audio signal input to the pins.
These functions are switched by the XDSEL and EMPHOEN flags in the HDCD control register as listed below.
HDCD Decoded Signal Output to the Digital Interface Block
The 20-bit data processed by the HDCD decoder can be output as digital data from the DOUT pin. The average level of
the output data will differ depending on the digital/analog setting for the gain scaling mode and the type of the disc being
played back. The values shown in the table are levels relative to the average value of the source signal.
HDCD Decoded Signal Output from LRCKO, DACKO, DFOLO, and DFORO — Pin 33: LRCKO, pin 36: DACKO,
pin 35: DFOLO, pin 34: DFORO
HDCD decoded 1fs 20-bit data can be output digitally from the LRCKO, DACKO, DFOLO, and DFORO pins. The
output data is identical to that output from the DOUT pin.
It is also possible to output post-HDCD decoder processing HDCD processed 8
×
oversampled 20-bit data (or 4
×
oversampled 20-bit data in double-speed mode) from the LRCKO, DACKO, DFOLO, and DFORO pins. This 8
×
oversampled signal has had internal deemphasis filtering and attenuator processing applied.
The 1FSOUT flag in the HDCD control register is used to switch between the above two types of data output.
The 16-bit data read out from the disc can also be output from the DOUT pin. That switching is controlled by the
SPDHDCD flag in the HDCD control register.
EMPOEN
XDSEL
EMPH pin state
Deemphasis filter control signal source
RES = low
0
0
Must be tied either high or low.
The subcode Q preemphasis on/off information
High: on, low: off.
G
G
0
1
The deemphasis on/off signal must be applied.
High: on, low: off.
The signal applied to the EMH pin
High: on, low: off.
1
0
Outputs the subcode Q preemphasis on/off information
High: on, low: off.
The subcode Q preemphasis on/off information
High: on, low: off.
1
1
Do not set this mode. The IC may operate incorrectly.
GS mode
Digital scaling
Analog scaling
Disc type
(EXSCA = 0)
(EXSCA = 1)
PE processed HDCD disc
–6 dB
When GAIN is low: 0 dB
When GAIN is high: –6 dB
HDCD disc that was not PE processed
–6 dB
0 dB
Non-HDCD disc
–6 dB
0 dB
SPDHDCD
Data output from the DOUT pin
RES = low
0
Pre-HDCD decoder processing 1 fs 16-bit data
G
G
1
Post-HDCD decoder processing 1 fs 20-bit data
1FSOUT
Data output from LRCKO, DACKO, DFOLO, and DFORO
RES = low
0
Post-HDCD filter processing 8 fs data
G
G
1
Pre-HDCD filter processing 1 fs data
相關(guān)PDF資料
PDF描述
LC78628E 16-bit fixed point DSP with Flash
LC78630 16-bit fixed point DSP with Flash
LC78630E 16-bit fixed point DSP with Flash
LC78631 16-bit fixed point DSP with Flash
LC78631E 16-bit fixed point DSP with Flash
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LC78628E 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Compact Disc Player DSP with Built-in HDCD Decoder
LC7863 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:DIGITAL SIGNAL PROCESSOR FOR COMPACT DISC PLAYERS
LC78630 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Compact Disk Player DSP
LC78630E 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Compact Disk Player DSP
LC78631 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Compact Disk Player DSP
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