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RELEASED
PM4354 COMET-QUAD
DATASHEET
PMC-1990315
ISSUE 6
FOUR CHANNEL COMBINED E1/T1/J1
TRANSCEIVER / FRAMER
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC. AND FOR ITS CUSTOMERS’ INTERNAL USE
57
the data channels and should be synchronized with the H-MVIP data channels. Over a T1 or E1
multi-frame the four CAS bits per channel are repeated with each data byte. Four stuff bits are
used to pad each CAS nibble (ABCD bits) out to a full byte in parallel with each data byte.
The third H-MVIP signal, CCSBTD, is used to time division multiplex the Common Channel
Signaling (CCS) for all 4 T1’s and E1’s plus V5.1 and V5.2 channels in E1 mode.
Figure 21:
- Transmit Clock Slave: Full T1/E1 with CCS H-MVIP
TJAT
FIFO
T1-XBAS/E1-TRAN
BasicTransmitter:
Frame Generation,
Alarm Insertion,
Signaling Insertion,
Trunk Conditioning
Line Coding
TRANSMITTER
Transmit CLK[1:4]
Transmit Data[1:4]
BTSIG[1:4]
BTPCM[1:4]
BTCLK[1:4]
TJAT
Digital PLL
BTPCM[x], BTSIG[x]
Timed to BTCLK[x]
BTFP[1:4]
CMV8MCLK
CMVFPC
CCSBTD
CCSBTDTimed
to CMV8MCLK
CMVFPB
CCS ELST
Elastic
Store
BTIF
Backplane
Transmit
System
Interface
Transmit Clock Slave: Full T1/E1 with CCS H-MVIP mode is the same as Transmit Clock Slave:
Full T1/E1 mode except that Common Channel Signaling (CCS) is inserted into the transmit
stream via an H-MVIP interface. The CCSBTD H-MVIP signal is used to time division multiplex
the Common Channel Signaling (CCS) for all 4 T1’s and E1’s plus V5.1 and V5.2 channels in E1
mode. The H-MVIP interface use common clocks, CMV8MCLK and CMVFPC, and frame pulse,
CMVFPB, for synchronization.
BTCLK[x] may optionally be configured as clock master. This is represented with the above figure
but with BTCLK[x] being driven by the COMET-QUAD rather than being an input.
9.20 Transmit Per-Channel Serial Controller (TPSC)
The Transmit Per-Channel Serial Controller allows data and signaling trunk conditioning or idle
code to be applied on the transmit DS-1 stream on a per-channel basis. It also allows per-channel
control of zero code suppression, data inversion, channel loopback (from the backplane receive
stream), channel insertion, and the detection or generation of pseudo-random or repetitive
patterns.
The TPSC interfaces directly to the E1-TRAN and T1-XBAS block and provides serial streams for
signaling control, idle code data and backplane transmit data control.