L64780 LSI Logic Corporation, L64780 Datasheet - Page 82

• Manufacturer Part Number: L64780
• Description: Dvb-t Cofdm Demodulator Technical Manual 2/00
• Manufacturer: LSI Logic Corporation

4.4.11 Address Line 0x12
4-30
FFT_GAIN
RES
CSI_OUT_FORMAT
CSI_IIRATE
Register Descriptions
0x12
7
FFT Clipping and Rounding
This register selects how the FFT clips and rounds in
case of overflow. The values are:
The initial condition for these bits is 0b10, Gain 2.
Reserved
These bits are reserved.
CSI Softbits Format
This bit allows the generation of softbit values either in
two’s complement (1) or in binary offset (0). The initial
condition for this bit is 0, binary offset.
CSI IIR Filter Gain
These bits set the IIR Gain of the Channel State
Information Unit. The values are:
The initial condition for the CSI_IIRATE is 0b01, Gain 1.
CSI_IIRATE[1:0]
FFT_GAIN[1:0]
0
0
1
1
0
0
1
1
RES
0
1
0
1
0
1
0
1
Definition
Gain 0
Gain 1
Gain 2
Gain 3
Definition
Gain 0
Gain 1
Gain 2
Gain 3
3
CSI_OUT_
FORMAT
2
CSI_IIRATE
1
R/W [1:0]
R/W [1:0]
R/W 2
[7:3]
0