參數(shù)資料
型號: MT312
廠商: ZARLINK SEMICONDUCTOR INC
元件分類: 消費(fèi)家電
英文描述: Satellite Channel Decoder
中文描述: SPECIALTY CONSUMER CIRCUIT, PQFP80
封裝: MQFP-80
文件頁數(shù): 48/90頁
文件大?。?/td> 318K
代理商: MT312
MT312
Forward Error Correction
48
B0:
BER tog High = BER toggle. This bit enables the audio signal output on the STATUS pin it indicates
BER during dish alignment, see 12, section 1.4.1.2. The frequency of the signal is controlled by
VIT MAXERR register (94), see 70.
7.1.3 FEC Set Up. Register 97 (R/W)
B7:
When MANUAL MOCLK (register 96 bit 7) is Low then:
DIS SR
High = Disable use of Symbol Rate for MOCLK generation.
Low = Use Symbol Rate for MOCLK generation.
When MANUAL MOCLK (register 96 bit 7) is High then:
DIS SR
High = Use external MICLK (pin 14) signal for MOCLK.
Low = Manually set MOCLK period from MOCLK RATIO (reg. 33).
B6:
ENCLKO
High = Enable clock out for test purposes.
B5:
DIS DS
High = Disable de-scrambler.
B4:
DIS RS
High = Disable Reed Solomon decoder.
B3:
DIS VIT
High = Disable Viterbi (Viterbi by pass mode)
B2:
EN PRS
High = Enable programmed synchronisation byte in register 98.
B1-0:DS LK[1:0] + 2 =Number of bytes for de-scrambler to lose lock. The default register value of 3 is
equivalent to 5 bad sync words.
7.2 Forward Error Correction Read Registers
7.2.1 FEC Interrupt. Register 3 (R)
B7:
High = DiSEqC
B6:
High = Byte Align lock lost
B5:
High = Byte Align lockimportant indicator.
B4:
High = Viterbi lock lost
B3:
High = Viterbi lock
NAME
ADR
B7
B6
B5
B4
B3
B2
B1
B0
Def
hex
FEC SETUP
97
DIS SR
ENCL
KO
DIS
DS
DIS
RS
DIS
VIT
EN
PRS
DS LK[1:0]
R/W
03
NAME
ADR
B7
B6
B5
B4
B3
B2
B1
B0
Def
hex
FEC INT
03
FEC INT[7:0] Interrupt FEC
R
00
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