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GS9090B Datasheet(PDF) 34 Page - Gennum Corporation |
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GS9090B Datasheet(HTML) 34 Page - Gennum Corporation |
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34 / 71 page  GS9090B Data Sheet 40749 - 2 January 2007 34 of 71 3.9.3 EDH Packet Detection The GS9090B will determine if EDH packets are present in the incoming video data and assert the EDH_DETECT output status signal appropriately. EDH_DETECT will be set HIGH when EDH packets have been detected and will remain HIGH until EDH packets are no longer present. The signal will be set LOW at the end of the vertical blanking (falling edge of V) if an EDH packet has not been received and detected during vertical blanking. EDH_DETECT can be programmed to be available for output on the multi-function output port pins (see Section 3.12). The EDH_DETECT bit is also available in the DATA_FORMAT register at address 04h (see Table 3-7). Table 3-4: Host Interface Description for Programmable Ancillary Data Type registers Register Name Bit Name Description R/W Default ANC_TYPE 1 Address: 0Ah 15-8 ANC_TYPE1[15:8] Used to program the DID for ancillary data detection at ANC output R/W 0 7-0 ANC_TYPE1[7:0] Used to program the SDID for ancillary data detection at ANC output. Should be set to zero if no SDID is present in the ancillary data packet to be detected. R/W 0 ANC_TYPE 2 Address: 0Bh 15-8 ANC_TYPE2[15:8] Used to program the DID for ancillary data detection at ANC output R/W 0 7-0 ANC_TYPE2[7:0] Used to program the SDID for ancillary data detection at ANC output. Should be set to zero if no SDID is present in the ancillary data packet to be detected. R/W 0 ANC_TYPE 3 Address: 0Ch 15-8 ANC_TYPE3[15:8] Used to program the DID for ancillary data detection at ANC output R/W 0 7-0 ANC_TYPE3[7:0] Used to program the SDID for ancillary data detection at ANC output. Should be set to zero if no SDID is present in the ancillary data packet to be detected. R/W 0 ANC_TYPE 4 Address: 0Dh 15-8 ANC_TYPE4[15:8] Used to program the DID for ancillary data detection at ANC output R/W 0 7-0 ANC_TYPE4[7:0] Used to program the SDID for ancillary data detection at ANC output. Should be set to zero if no SDID is present in the ancillary data packet to be detected. R/W 0 ANC_TYPE 5 Address: 0Eh 15-8 ANC_TYPE5[15:8] Used to program the DID for ancillary data detection at ANC output R/W 0 7-0 ANC_TYPE5[7:0] Used to program the SDID for ancillary data detection at ANC output. Should be set to zero if no SDID is present in the ancillary data packet to be detected. R/W 0 |
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