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參數(shù)資料
| 型號： | LC78628 |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 元件分類： | 數(shù)字信號處理 |
| 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)： | 23/40頁 |
| 文件大?。?/td> | 241K |
| 代理商： | LC78628 |
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No. 6329-23/40
LC78628E
Code
Command
Function
RES = low
$42
DOUT ON
Enabled state for output of the various data types from DOUT.
G
G
$43
DOUT OFF
Sets the DOUT output to be fixed at the low level.
$40
UBIT ON
Of the DOUT data, the subcodes Q through W are output as the UBIT information.
G
G
$41
UBIT OFF
Of the DOUT data, the UBIT information is set to all zeros.
$88
CDROM-XA
The ROMXA flag is set to 1.
$8B
ROMXZ-RST
The ROMXA flag is set to 0.
G
G
The following table lists the DOUT related commands. See the item on the HDCD control register for details on the
method for setting the SPDHDCD flag.
16. One-bit D/A converter — Pin 48: LCHP, pin 49: LCHN, pin 52: RCHN, pin 53: RCHP, pin 46: MUTEL,
pin 55: MUTER
The LC78628E PWM block outputs a single data value in the range –3 to +3 once every 64 fs period. To reduce
carrier noise, this block adopts an output format in which each data switching block is adjusted so that the PWM
output level does not invert. This block outputs a positive phase signal to the LCHP (RCHP) pin and a reverse phase
signal to the LCHN (RCHN) pin. High-quality analog signals can be acquired by taking the differences of these two
output pairs using external low-pass filters. Note that the LC78628E includes built-in radiation suppression resistors
(1 k
) in each of the LCHP/N and RCHP/N pins.
Additionally, if the played back song data (source signal) goes to zero continuously for longer than a certain fixed
period (about 100 ms in normal-speed playback), the IC goes to D/A converter muting mode and outputs zero-valued
data (a 50/50 duty). Since this zero detection function operates independently for the left and right channels, when
zero is detected and muting mode is turned on, a high level is output from either the MUTEL or MUTER pin,
according to the channel in which zero was detected.
PWM output format
–3
+3)
–2
+2
–1
+1
0
0
+1
–1
+2
–2
+3
(–3
LCHP
(RCHP)
One data item
2.8224 MHz(64 fs)
LCHN
(RCHN)
+3
–3)
+2
–2
+1
–1
0
0
–1
+1
–2
+2
–3
(+3
–2
–3
+3
+1
+1
–1
0
+2
Data value
LCHP
(RCHP)
LCHN
(RCHN)
A12823
A12822
PWM output example
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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