PM6341 E1XC
DATA SHEET
PMC-910419
ISSUE 8
E1 FRAMER/TRANSCEIVER
Pin Name Type
Pin No.
Function
PQFP PLCC
33 38
RFP
Output
When configured for composite
multiframe output, RFP goes high on
the falling RCLKO edge marking the
beginning of bit 1 of frame 1 of every
16 frame signalling multiframe,
indicating the signalling multiframe
alignment of the RDPCM data stream,
and returns low on the falling RCLKO
edge marking the ending of bit 1 of
frame 1 of every 16 frame CRC
multiframe, indicating the CRC
multiframe alignment of the RDPCM
data stream. This mode allows both
multiframe alignments to be decoded
externally from the single RFP signal.
Note that if the signalling and CRC
multiframe alignments are coincident,
RFP will pulse high for 1 RCLKO cycle
every 16 frames.
RFP does not indicate the frame or
multiframe alignment of RDPCM when
the digital receive interface is
configured for unipolar operation
(RUNI = 1 and RDIEN = 1 in register
03H.)
RFP is updated on the falling edge of
RCLKO.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
20
PMC [ PMC-SIERRA, INC ]
