參數(shù)資料
型號(hào)： LM4560VJD
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 消費(fèi)家電
英文描述： Advanced PCI Audio Accelerator
中文描述： SPECIALTY CONSUMER CIRCUIT, PQFP100
封裝： PLASTIC, TQFP-100
文件頁數(shù)： 42/54頁
文件大?。?/td> 380K
代理商： LM4560VJD
4.0 Functional Description
(Continued)
4.2.1.10.2 COMMAND 90H
Function: 8-bit continuous special DMA playback
SB ESP will generate an interrupt after each block length of data has been transferred.
4.2.1.10.3 Command 91h
Function: 8-bit non-continuous special DMA playback
SB ESP will generate an interrupt after the specified block length of data has been transferred.
For non-continuous special DMA playback, every time when SB ESP receives the 91h command, SB ESP will use the block
length that most recently set by command 48h to begin the special DMA transfer.
4.2.1.10.4 Command 98h
Function: 8-bit continuous special DMA recording
SB ESP will generate an interrupt after the specified block length of data has been transferred.
4.2.1.10.5 Command 99h
Function: 8-bit non-continuous special DMA recording
SB ESP will generate an interrupt after the specified block length of data has been transferred.
4.2.1.11 16-Bit Audio Playback/Recording Command Bxh
4.2.1.11.1 Command Bit Definition
Bit 3
0 Playback
1 Recording
Bit 2
0 Non-Continuous DMA
1 Continuous DMA
Bit 1 X Reserved
Bit 0 X Reserved
4.2.1.11.2 Command B0h/B1h/B2h/B3h/B4h/B5h/B6h/B7h
Function: 16-bit audio playback
Mode
Bit 7..6 X reserved
Bit 5
0 mono
1 stereo
Bit 4
0 unsigned PCM (0–8000h–FFFFh)
1 signed PCM (8000h–0–7FFFh)
Bit 3..0 X reserved
Length = number of words to be transferred -1
For non-continuous DMA, SB ESP will generate an interrupt and terminate the DMA transfer after the specified length of data has
been transferred.
For continuous DMA, SB ESP will generate an interrupt after each specified block length of data has been transferred.
4.2.1.11.3 Command B8h/B9h/BAh/BBh/BCh/BDh/BEh/BFh
Function: 16-bit audio recording
Mode
Bit 7..6 X reserved
Bit 5
0 mono
1 stereo
Bit 4
0 unsigned PCM (0–8000h–FFFFh)
1 signed PCM (8000h–0–7FFFh)
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