PM4341AT1XC
DATA SHEET
PMC-900602
ISSUE 7
T1 FRAMER/TRANSCEIVER
SRPCM:
The SRPCM bit selects the output signal seen on the multifunction output
RPCM/ RDPCM. When set to logic 1, the multifunction output becomes
RPCM, the undecoded PCM output from the Clock and Data Recovery
(CDRC) . When SRPCM is set to logic 0, the multifunction output becomes
RDPCM, the B8ZS-decoded PCM output from the CDRC .
SRSFP:
The SRSFP bit selects the output signal seen on the multifunction output
RFP. When set to logic 1, the multifunction output becomes RSFP, the
receive superframe pulse indication, which pulses high during the first framing
bit of the 12 frame SF or the 24 frame ESF (depending on the framing format
selected in the FRMR ). When SRSFP is set to logic 0, the multifunction
output becomes RFP, which pulses high during each framing bit (i.e. every
193 bits).
ALTRFP:
The ALTRFP bit suppresses every second output pulse on the multifunction
output RFP. When ALTRFP is set to logic 1, the output signal on RFP pulses
every 386 bits, indicating every second framing bit (if the SRSFP bit is logic
0); or the output signal on RFP pulses every 24 or 48 frames (if the SRSFP
bit is logic 1). When ALTRFP is set to logic 0, the output signal on RFP
pulses in accordance to the SRSFP bit setting.
CCOFA:
The CCOFA bit determines whether the PMON counts Change-Of-Frame
Alignment (COFA) events or out-of-frame (OOF ) events. When CCOFA is set
to logic 1, COFA events are counted by PMON. When CCOFA is set to logic
0, OOF events are counted by PMON.
Upon reset of the T1XC, these bits are cleared to zero.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
65
PMC [ PMC-SIERRA, INC ]
