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STA310 数据表(PDF) 59 Page - STMicroelectronics |
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STA310 数据表(HTML) 59 Page - STMicroelectronics |
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59 / 90 page  59/90 STA310 Description: This register specifies the number of supplementary packet synchro words that the packet parser must detect before it is considered as synchronized, and can send data to the audio parser (max=1, min=0). In this way, stream data can not be sent to the audio parser instead of packet sync words. PACKET_LOCK = 0: the packet parser is synchro- nized when it has detected one packet synchro word. PACKET_LOCK = 1: the packet parser is synchro- nized when it has detected two packet synchro words. ID_EN Enable audio ID Address: 0x50 Type: R/W Software Reset: NC Hardware Reset:UND Description: If set to 1, the audio decoder decodes only the stream corresponding to the stream-id or sub-stream-id of the packet layer. This selection is done through AUDIO_ID or AUDIO_ID_EXT registers. If set to 0, the decoder decodes all the audio packets. ID Audio ID Address : 0x51 Type: R/W Software Reset: NC Hardware Reset: UND Description: When decoding packets, it is possible to specify an identifier for a selected program. AUDIO_ID must be written with the packet ID. This feature is enabled when the register AUDIO_ID_EN is set, and only packets with matching ID are decoded. For MPEG1 packets or PES, the 5 LSB bits are sig- nificant. For DVD PES (LPCM, Dolby Digital or MPEG), the 3 LSB bits are significant (see audio pack definition in DVD specifications). These bits correspond to the stream number defined in the STREAM_ID field of the audio packet header, except for DVD, Dolby Digital or LPCM packets, where they correspond to the stream number defined in the SUB_STREAM_ID field. ID_EXT Audio extension Address + 0x52 Type: R/W Software Reset: NC Hardware Reset: UND Description: The 3 LSB bits of this register are significant. In case of DVD MPEG2 audio with extension bitstream (see DVD specifications), this register is used to select the stream defined in the STREAM_ID of the packets containing MPEG2 extension bit stream data. SYNC_LOCK SYNC lock Address: 0x53 Type: R/W Software Reset: NC Hardware Reset: UND Description: This register specifies the number of supplementary audio synchro words that the audio parser must de- tect before it is considered as synchronized, and can send data to the decoder. In this way, stream data can not be sent to the decod- er instead of audio sync words. Max value = 3; min value = 0. SYNC_LOCK = 0, the audio parser is syn- chronized when it has detected one audio synchro word. SYNC_LOCK = n > 0, when the audio parser has detected one synchro word, it waits until it de- tects n supplementary audio sync words. 765 4321 0 765 4321 0 765 4321 0 765 4321 0 |
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