L64780 LSI Logic Corporation, L64780 Datasheet - Page 63

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

4.3 TPS Registers
4.3.1 Address Line 0x02
These registers have two functions, depending on whether they are read
from, or written to. If they are read from, they indicate that the contents
of the last TPS structure were correctly received. If they are written to,
they set the next mode of operation of the DTTV demodulator. The mode
change does not take effect until the CHANGE_MODE command is
issued (by setting the CHANGE_MODE bit in the Mode register). The
meaning of the bits contained in the TPS are described in the ETSI
specification.
RES
FFTMODE
TPS Registers
0x02
7
Reserved
These bits are reserved.
COFDM Transmission Mode
When this register is read, these bits provide the last
value received by the channel, using the TPS signalling
information.
When the register is written, these bits store the next
COFDM transmission mode value that the system uses.
The values are:
The initial condition for the FFTMODE is 0b00 (2k).
FFTMODE[1:0]
RES
00
01
10
11
4
Definition
2 k Mode
8 k Mode
Unused
Unused
FFT MODE
3
2
1
GUARD
R/W [3:2]
[7:4]
0
4-11