參數(shù)資料
型號(hào): L64777
廠商: LSI CORP
元件分類: 消費(fèi)家電
英文描述: Digital Video Broadcasting(DVB)-Compliant,quadrature amplitude modulation (QAM)Modulator(數(shù)字視頻廣播系統(tǒng)適配的積分調(diào)幅調(diào)制器)
中文描述: SPECIALTY CONSUMER CIRCUIT, PQFP120
封裝: 32 MM, PLASTIC, QFP-120
文件頁數(shù): 112/124頁
文件大?。?/td> 988K
代理商: L64777
B-2
PLL Divider Settings and L64724/34 Connection
The QAM modulator is programmed for its configuration and operational
modes through the Serial Microprocessor interface. The L64777
synchronizes with the input data, derives the operating clock (based on
the operational mode), carries out clock conversion with appropriate
FIFO management, inserts the sync and error flags, and performs
scrambling, RS encoding, and convolutional interleaving.
Signal frequencies at the symbol clock (SCLK) and operating clock
(OCLK) outputs of the L64777 indicate appropriate locking of the internal
timing system with respect to the incoming data rates when the input is
from an MPEG source or the L64724 satellite receiver. The relationship
among the SCLK, OCLK, and input data rate is described in the following
subsections. If the same serial host controls both the L64724 and the
L64777, hold the L64777 in reset until the L64724 PLL has been
programmed.
B.2 PLL Driver Settings for Typical Applications
Table B.1 lists the L64777’s PLL driver settings for Mode 1.
Note that the above settings assume a block length of 204 bytes with 16
invalid bytes and TS is the effective input rate attained, considering the
number of cycles with valid data.
Table B.1
Typical Settings of CNT_I and CNT_O
ICLK
in MHz
QAM
mode
TS rate
in Mbyte/s
/Mbit/s
CNT_I
(decimal)
CNT_O
(decimal)
Frequency at
Phase
Comparator
in MHz
OCLK
in MHz
7.32
256
6.75/54.0
8
32
0.92
29.30
5.17
64
4.76/38.1
6
32
0.87
27.56
4.33
32
3.99/31.9
5
32
0.87
27.69
3.42
16
3.15/25.2
4
32
0.86
27.34
相關(guān)PDF資料
PDF描述
L64825 Non-VGA Video Controller
L64845 64-Bit Graphics (GUI) Accelerator
L64850GC-25 DRAM Controller
L64850GC-33 DRAM Controller
L64850GC-40 DRAM Controller
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L64780 制造商:未知廠家 制造商全稱:未知廠家 功能描述:L64780 DVB-T COFDM Demodulator technical manual 2/00
L64781 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Single-Chip COFDM Receiver
L64782 制造商:未知廠家 制造商全稱:未知廠家 功能描述:L64782 Single-Chip COFDM Receiver
L6480 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:The L6480, realized in analog mixed signal technology, is an advanced fully integrated solution suitable for driving two-phase bipolar stepper motors with microstepping.
L64801GC-20 制造商:未知廠家 制造商全稱:未知廠家 功能描述:32-Bit Microprocessor