sta002 STMicroelectronics, sta002 Datasheet - Page 37

• Manufacturer Part Number: sta002
• Description: Starmano Channel Decoder
• Manufacturer: STMicroelectronics

8.4 FRAME SYNCRONIZATION TIMES
FRAME SYNCRONIZATION
Tx = MFP detection time: 0 to 138ms
Ta = TSCC decodification time:= < 2ms
Ty = PRCP detection time: 0 to 432ms
Tdec = VITERBI decoding +
TDM SYNCRONIZATION TIME
TDM lock = QPSK lock + Tx + 138ms
PRC SYNCRONIZATION TIME
PRC lock = QPSK lock +TDM lock + Ty + 432 ms
BC SYNCRONIZATION TIME
CASE 1 ( SW sync):
the BC synchronization FSM asserts the lock sig-
I2C INTERFACE
NORMAL
CASE 1
CASE 2
SYNC
SYNC
SYNC FOR MFP VERIFICATION
MFP
START INTERNAL TIMING
HW
MFP DETECTION
TSCC AVAILABLE
ALL PRC EXTRACTED LOCK
MFP LOCK
MFP LOCK
BC FRAME SYNC
MFP DETECTION
96 SY
Tx
REED SOLOMON error correction +
deinterleaving: ~55ms x PRC number
SP LOCK
SP LOCK
MFP
TSCC
READ
TSCC
Ta
DATA MULTIPLEX
PRE SYNC
AVAILABLE
VITERBI & RS
DATA READ
DECODED
TSCC
TSCC
DATA FIELD
MFP
MFP
VER
SELECTION
DATA FIELD
TDM FRAME 138 ms
BC
TSCC
FIELD
DATA FIELD
TSCC
VITERBI & RS & DEINTELEAVER
PRCP DETECTION
DATA MULTIPLEX
DATA READ
SP DETECTION
SP DETECTION
from 1 to8 PRC
Ty
EXTRACTION
CHANNELS
PRC
MULTIPEXING
MFP
VER
MFP
CHANNELS
PRC
TSCC
FIELD
TSCC
TSCC
DATA MULTIPLEX
PRCP
2112 SYMBOLS
DATA READ
DATA MULTIPLEX
SP
TDM SYNCHRONISATION STATE MACHINE
PRC SYNCHRONISATION STATE MACHINE
MFP
VER
MFP
Tdec
TDM SYNCHRONISATION STATE MACHINE
TSCC
FIELD
TSCC
TDM STATE MACHINE
251712 SYMBOLS
DATA MULTIPLEX
PRC FRAME 432 ms
DATA READ
nal when the SP is detected two consecutive
times.
BC lock = QPSK lock + TDM lock + Ty + Tdec +
432 ms
CASE 2 ( HW sync):
the BC synchronization FSM asserts the lock sig-
nal when the BC FRAME SYNC signal is as-
serted by the PRC alignment FSM and the SP is
valid.
BC lock = QPSK lock + TDM lock + Ty + Tdec
Note :
About the BC synchronisation, the selection be-
tween SW sync and
through the register BC_ALARM add 01CH bit
b5.
Bit b5 = 1 indicates the SW sync Bit b5 = 0 indi-
cates HW sync.
PROTECTED BC FRAME 432 ms
SP
PRE SYNC
DATA FIELD
DATA FIELD
SCH
MFP
MFP
VER
TSCC
FIELD
TSCC
SYNC
DATA MULTIPLEX
DATA FIELD
DECODED BC FRAME 432 ms
DATA READ
MFP
MFP
VER
PRE SYNC
TSCC
TSCC
FIELD
SYNC
DATA MULTIPLEX
DATA READ
HW syn is achievable
PRCP
SP
DATA FIELD
MFP
MFP
VER
SYNC
TSCC
FIELD
DATA FIELD
TSCC
DATA READ
STA002
SP
SYNC
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