Analog Devices ADV7850 Hardware Manual page 228

dcm_filt_sel[2:0], Addr A0 (VFE), Address 0x21[2:0]
This control is used to manually select a filter for the DCM filter block. The particular channel should be selected by filt_sel before this
control is set.
Function
dcm_filt_sel[2:0]
000 
001
010
011
100
All others
filt_sel3, Addr A0 (VFE), Address 0x24[7]
This control is used to enable the DCM filters on channel 3.
Function
filt_sel3
1
0 <<
filt_sel2, Addr A0 (VFE), Address 0x24[6]
This control is used to enable the DCM filters on channel 2.
Function
filt_sel2
1
0 <<
filt_sel1, Addr A0 (VFE), Address 0x24[5]
This control is used to enable the DCM filters on channel 1.
Function
filt_sel1
1
0 <<
coeff_part_sel[111:0], Addr A0 (VFE), Address 0x27[7:0]; Address 0x28[7:0]; Address 0x29[7:0]; Address 0x2A[7:0]; Address 0x2B[7:0];
Address 0x2C[7:0]; Address 0x2D[7:0]; Address 0x2E[7:0]; Address 0x2F[7:0]; Address 0x30[7:0]; Address 0x31[7:0]; Address 0x32[7:0];
Address 0x33[7:0]; Address 0x34[7:0]
This control is used to set the manual coefficients for the DCM filter.
coeff_part_wr, Addr A0 (VFE), Address 0x19[0] (Self-Clearing)
This control is used to write the coefficients for the DCM filters. It is self clearing.
Function
coeff_part_wr
1
Rev. A May 2012
Description
Reserved
Filter with auto coefficients
Filter with manual coefficients
Filter bypass with delay
Filter complete bypass
Reserved
Description
Enable channel 3
Disable channel 3
Description
Enable channel 2
Disable channel 2
Description
Enable channel 1
Disable channel 1
Description
Enable write to DCM coefficients
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ADV7850