L64724 LSI Logic Corporation, L64724 Datasheet - Page 83

• Manufacturer Part Number: L64724
• Description: Satellite Receiver
• Manufacturer: LSI Logic Corporation

DF_SELECT[2:0]
DF_GAIN[1:0]
DF_RATIO[2:0]
Group 4: Configuration Registers
Decimation Filter Select
Program the DF_SELECT[2:0] field to select one of the
four filters contained in the decimation filter module or to
bypass the decimation filter.
Decimation Filter Gain
The table below indicates the gain of the decimation filter.
Decimation Filter Ratio
Program the DF_RATIO[2:0] field to set the amount of
decimation. The value indicates the ratio of outgoing to
incoming samples at the decimation filter. For more
information see
page 5-4.
1
0
0
0
0
1
0
0
0
0
DF_SELECT[2:0]
0
0
1
1
DF_RATIO[2:0]
DF_GAIN[1:0]
0
0
0
1
1
0
0
0
1
1
Section 5.4, “Decimation Filters,”
0
1
0
1
0
0
1
0
1
0
0
1
0
1
Decimation Ratio
Gain Factor
No Filter
(bypass)
Filter 1
Filter 2
Filter 3
Filter 4
Filter
1/16
1/2
1/4
1/8
1
2
4
8
1
[7:5]
[4:3]
[2:0]
3-53