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): 48/126頁
文件大小: 953K
代理商: L64780
3-12
Interfaces
3.2.5 Access to the SDI Block
The SDI block performs Symbol Deinterleaving (SDI) as specified in the
ETSI specification. In this mode, the CLKMUXIN signal is configured as
an 18 MHz clock (more precisely, four times the low IF).
The signals on the 24-bit data bus (D) contain up to six soft decisions,
up to four bits per soft decision, a start pulse (START), a data valid (DV)
signal, and the symbol parity (S_P). An odd symbol number is marked
by S_P = 1; even symbol numbers are marked by S_P = 0. These
signals are mapped on the MUXINBUS. See
Figure 3.20
.
The data bus (D) is mapped in 3-bit and 4-bit soft decision modes, as
shown in
Figure 3.21
and
Figure 3.22
, respectively. The MSB is at the
highest weight position. Note that X means reserved.
Figure 3.20 SDI Input Mappings
26
25
24 23
0
S_P
START DV
D[23:0]
Figure 3.21 D[23:0] Bus Mapping in Three-Bit Soft Decision
23
21
20
19
17
16
15
13
12
11
9
8
7
5
4
3
1
0
QSPK I
X
QPSK Q
X
16 QAM I
X
16 QAM Q
X
64 QAM I
X
64 QAM Q
X
Figure 3.22 D[23:0] Bus Mapping in Four-Bit Soft Decision
23
20
19
16
15
12
11
8
7
4
3
0
QSPK I
QPSK Q
16 QAM I
16 QAM Q
64 QAM I
64 QAM Q
相關(guān)PDF資料
PDF描述
L652DU12RE 128 Megabit (16 M x 8-Bit) CMOS 3.0 Volt-only Uniform Sector Flash Memory with VersatileIO⑩ Control
L652DU12RF 128 Megabit (16 M x 8-Bit) CMOS 3.0 Volt-only Uniform Sector Flash Memory with VersatileIO⑩ Control
L652DU12RI 128 Megabit (16 M x 8-Bit) CMOS 3.0 Volt-only Uniform Sector Flash Memory with VersatileIO⑩ Control
L652DU12RK 128 Megabit (16 M x 8-Bit) CMOS 3.0 Volt-only Uniform Sector Flash Memory with VersatileIO⑩ Control
L652DU90RF 128 Megabit (16 M x 8-Bit) CMOS 3.0 Volt-only Uniform Sector Flash Memory with VersatileIO⑩ Control
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