參數(shù)資料
型號: L64780
廠商: LSI Corporation
英文描述: DVB-T COFDM Demodulator(對地數(shù)字視頻廣播 正交編碼頻率分割多路處理解調(diào)器)
中文描述: 的DVB - T COFDM解調(diào)器(對地數(shù)字視頻廣播正交編碼頻率分割多路處理解調(diào)器)
文件頁數(shù): 42/126頁
文件大小: 953K
代理商: L64780
3-6
Interfaces
When in 64 QAM mode, two soft decisions are transmitted on SD0 and
four soft decisions are transmitted on SD1. The DVOUT signal stays
asserted during two 540 MHz clock cycles over six 54 MHz clock cycles
and the DVOUT_LP signal stays asserted for four of six 54 MHz clock
cycles. See
Figure 3.11
.
Figure 3.11 Hierarchical, Two FEC Decoders, 64 QAM Constellation
3.1.2.2 Decoding Only One Stream (HP or LP)
In this mode, the output port of the L64780 is configured (
Figure 3.12
).
The DOF_HPLP signal selects between the HP and LP output streams.
The data stream in this output format is the same as for the
nonhierarchical case.
Figure 3.12 Output Interface in Hierarchical and One FEC Mode
CLKOUT54
SD10
SD11
SD12 SD13
SD00
SD01
SD14
SD15
SD16 SD17
SD02
SD03
SD0[3:0]
DVOUT
SD1[3:0]
DVOUT_LP
SD0 (HP/LP Stream)
DVOUT
CLKOUT54
L64780
SD1 (not used
*
)
DVOUT_LP (not used
*
)
* When not used, the signal is deasserted LOW.
4
4
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