Decimation Filter Selection For Stage 2 - Analog Devices Advantiv ADV7604 Hardware Manual

8.3.3

Decimation Filter Selection for Stage 2

The decimation filters of the A, B, and C channels are 19-tap fully programmable filters. The
response for these filters can be automatically or manually selected from a choice of seven
predefined filter responses.
DPP_FILT_MAN_EN, DPP Map, Address 0x28, [0]
The DPP_FILT_MAN_EN
responses, manually programming the filter and manually selecting a filter from a predefined set of
seven filter responses.
Function
DPP_FILT_MAN_EN
0
1
DPP_FILT_SEL, DPP Map, Address 0x28, [3:1]
DPP_FILT_SEL controls the manual selection of the filter response for the luma and chroma filters.
For the selection to be effective, manual control must be enabled by DPP_FILT_MAN_EN.
Function
DPP_FILT_SEL
000
001
010
011
100
101
110
111
Rev. F August 2010
bit allows the user to switch between the default luma and chroma filter
DPP_FILT_SEL is used to set the chosen filter.
Description
Default selection for luma and chroma filters (refer to
41)
Luma and chroma filter response defined by DPP_FILT_SEL
Description
Reserved
Filter response with Fc = 0.2 * Fs/2
Filter response with Fc = 0.3 * Fs/2
Filter response with Fc = 0.4 * Fs/2
Filter response with Fc = 0.5 * Fs/2
Filter response with Fc = 0.6 * Fs/2
Filter response with Fc = 0.7 * Fs/2
Filter response with Fc = 0.8 * Fs/2
193
ADV7604
Table