Xtal Clock Registering And Glitch Rejection Filter - Analog Devices ADV7850 Hardware Manual

Two muxes are used to select HSync /CSync 1 and HSync /CSync 2 from the three possible HSync signals. Similarly, two muxes are used
to select VSync 1 and VSync 2 from the three possible VS signals. These muxes are controlled by sync_ch1_hs_sel[1:0],
sync_ch1_vs_sel[1:0], sync_ch2_hs_sel[1:0], and sync_ch2_vs_sel[1:0]. The outputs of these four muxes, as well as the internal
EMB_SYNC_1 and EMB_SYNC_2 signals from the sync slicers (as described in Section 9.6.1) are passed to a clock registering and
deglitch block.
sync_ch1_hs_sel[1:0], IO, Address 0x07[5:4]
This control is used to select the HSync input to sync channel 1.
Function
sync_ch1_hs_sel[1:0]
00 
01
10
11
sync_ch1_vs_sel[1:0], IO, Address 0x07[3:2]
This control is used to select the VSync input to sync channel 1.
Function
sync_ch1_vs_sel[1:0]
00 
01
10
11
sync_ch2_hs_sel[1:0], IO, Address 0x08[5:4]
This control is used to select the HSync input to sync channel 2.
Function
sync_ch2_hs_sel[1:0]
00
01 
10
11
sync_ch2_vs_sel[1:0], IO, Address 0x08[3:2]
This control is used to select the VSync input to sync channel 2.
Function
sync_ch2_vs_sel[1:0]
00
01 
10
11

9.6.2.2 XTAL Clock Registering and Glitch Rejection Filter

As shown in Figure 86, the XTAL CLOCK REGISTERING BLOCK and DIGITAL GLITCH REJECTION FILTER have two outputs for
Rev. A May 2012
Description
Auto-select mode; hs_in1 or HSync from HDMI (HDMI-HS) set to channel 1 based on primary
mode set in prim_mode[3:0]. HDMI-HS selected in HDMI mode. HS1 input selected in
component or graphics mode.
Select hs_in1
Select hs_in2
HDMI-HS
Description
Auto-select mode; vs_in1 or VSync from HDMI (HDMI-VS) set to channel 1 based on primary
mode set in prim_mode[3:0]. HDMI-VS selected in HDMI mode. VS1 input selected in
component or graphics mode.
Select vs_in1 input
Select vs_in2 input
Reserved
Description
Select HS2 input
Select HS1 input
Select HS2 input
Select HDMI HS
Description
Select VS2 input
Select VS1 input
Select VS2 input
Select HDMI VS
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ADV7850