BT8954 CONEXANT [Conexant Systems, Inc], BT8954 Datasheet - Page 40

• Manufacturer Part Number: BT8954
• Description: VOICE PAIR GAIN FRAMER
• Manufacturer: CONEXANT [Conexant Systems, Inc]

3.0 Circuit Descriptions
3.7 Synchronization
3.7.2 RTF Receiver Synchronization
Figure 3-17. RTF Receiver Synchronization
3.7.3 RTF Transmitter Synchronization
Figure 3-18. RTF Transmitter Synchronization
3-18
TPCM_6 ms
TDSL_6 ms
RPCM_6 ms
RDSL_6 ms
RDAT
SYNC_WORD
TFIFO_WL.RT = TFIFO_WL.COT
RFIFO_WL.RT
The RDSL_6 ms signal in the RTF is generated after SYNC_WORD has been
detected on RDAT. As illustrated in
from RDSL_6ms by RFIFO_WL.RT (RFIFO Water Level in the RTF). The PCM
receive frames are slaved to the DSL receive frame timing at the Remote Site.
In the RTF, the RPCM_6 ms and TPCM_6 ms signals are the same because the
same PCM frame SYNC is used for transmitting and receiving PCM frames from
the PCM codecs. As illustrated in
TPCM_6 ms by TFIFO_WL.RT (TFIFO Water Level in the RTF). The DSL
transmit frames are slaved to the PCM transmit frame timing, which in turn is
slaved to the DSL receive frame timing at the Remote Site.
TFIFO_WL.RT = TFIFO_WL.COT.
Conexant
6 ms
6 ms
Figure
6 ms
Figure
6 ms
3-18, TDSL_6ms is phase-offset from
3-17, RPCM_6 ms is phase-offset
SYNC_WORD
Voice Pair Gain Framer
N8954DSC
Bt8954