SPCA514A 查看數據表（PDF） - Unspecified

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SPCA514A

Digital Audio USB Controller

Unspecified 

SPCA514A

3.7. SPCA751 Interface

The SPCA514 has a serial interface to communicate with SPCA751. SPCA751 is an

Digital Audio processor (DAp). It also supports audio recording and compression.

Integrating SPCA751 with SPCA514 results in a complete Digital Audio player and a digital

recorder. While operating as an Digital Audio player, the SPCA514 fetch the Digital Audio

bit stream from the flash memory and send it to the SPCA751 for playback. While

operating as an digital recorder, the SPCA751 record and compress the audio data and

send the data to SPCA514. Then, the SPCA514 stores the compressed audio data into the

flash memory. Both of the operation is done via the serial interface between SPCA514 and

SPCA751. In both cases, the SPCA514 acts as a master. It sends commands, and data if

necessary, to the SPCA751. It also requests data from the SPCA751.

The following diagram shows how the SPCA514 communicate with SPCA751. Each data

transaction to the SPCA751 starts with a TX frame sync signal (mptxfs), and the de-

assertion of the frame sync signal indicates the transfer of the last word. Each data

transaction from the SPCA751A starts with an RX frame sync (mprxfs), and the signal is

de-asserted at the last word of data transfer. Notes that the communication between

SPCA514 and SPCA751 is based on word unit. The serial clock is driven by the SPCA514.

Both SPCA514 and SPCA751 sample the data at the falling edge of the serial clock.

Camera ASIC









SPCA751

(MP3)













 

 



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