L64780 LSI Logic Corporation, L64780 Datasheet - Page 81

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

4.4.10 Address Line 0x11
i
CPE_DISABLE
CE_DISABLE CE Disable
CE_DISABLE_ETS
CE_TEMPOTYPE
CE_SELECT CE MUXOUT Selector
FFT_DIR
Parameter Registers
0x11
DISABLE
CPE_
7
Common Phase Error Disable
This bit determines if the CPE is disabled (1) or not (0).
The initial condition for this bit is 0, normal operation.
This bit determines if the CE is disabled (1) or not (0).
The initial condition for this bit is 0, normal operation.
CE Timing Shift Disable
The Channel Equalizer emulates a negative echo to ease
implementation. If this bit has a value of 1, the negative
echo generation is disabled. If this bit is set to 0, the
negative echo generation is enabled. The initial condition
for this bit is 0, Working Mode.
CE Timing Interpolation Type
This bit selects the mode of operation of the Channel
Equalizer Timing Interpolation. If this bit is 0, the mode is
Zero Order Hold; if this bit is 1, the mode is Linear. The
initial condition for this bit is 1, Linear.
When MUXOUT is selected to output the Channel
Equalizer value, either the Channel Response (1) or the
Equalized Data (0) can be output. Note that both cases
do not affect receiver functionality. The initial condition for
this bit is 0, Equalized Data.
FFT Direction
This bit determines if the FFT is in Forward mode (Timing
to Frequency Domain, 0) or Backward mode (Frequency
to Timing Domain, 1). For L64780 normal operational
mode, the FFT direction is Forward. The initial condition
for the FFT_DIR is 0, Forward.
DISABLE
CE_
6
DISABLE_
CE_
ETS
5
CE_TEMPO-
TYPE
4
CE_SEL
ECT
3
FFT_DIR
2
FFT_GAIN
1
R/W 7
R/W 6
R/W 5
R/W 4
R/W 3
R/W 2
4-29
0