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GS1672 Datasheet(PDF) 49 Page - Semtech Corporation |
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GS1672 Datasheet(HTML) 49 Page - Semtech Corporation |
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49 / 116 page  GS1672 HD/SD-SDI Serializer with Complete SMPTE Audio & Video Support Data Sheet 53623 - 6 July 2011 49 of 116 Each group channel specifies the audio source using a 3-bit selector defined below in Table 4-9: Each Primary and Secondary group channel specifies the audio source using the following host interface fields: Audio channels can be paired only when both channels are derived from the same Word Clock and are synchronous. The same audio channel cannot be used in both Primary and Secondary groups at the same time. The GS1672 asserts the XPOINT_ERROR host interface bit if any audio channel is programmed to be included in both the Primary and Secondary groups. Table 4-9: GS1672 SD Audio Crosspoint Channel Selection Audio Source SD Selector HD Selector Input channel 1 000 000 Input channel 2 001 001 Input channel 3 010 010 Input channel 4 011 011 Input channel 5 100 100 Input channel 6 101 101 Input channel 7 110 110 Input channel 8 111 111 Table 4-10: Audio Source Host Interface Fields Host Interface Field Description Default GPA_CH1_SRC[2:0] Primary Group Channel 1 Source Selector 000 GPA_CH2_SRC[2:0] Primary Group Channel 2 Source Selector 001 GPA_CH3_SRC[2:0] Primary Group Channel 3 Source Selector 010 GPA_CH4_SRC[2:0] Primary Group Channel 4 Source Selector 011 GPB_CH1_SRC[2:0] Secondary Group Channel 1 Source Selector 100 GPB_CH2_SRC[2:0] Secondary Group Channel 2 Source Selector 101 GPB_CH3_SRC[2:0] Secondary Group Channel 3 Source Selector 110 GPB_CH4_SRC[2:0] Secondary Group Channel 4 Source Selector 111 |
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