PM6341 E1XC
DATA SHEET
PMC-910419
ISSUE 8
E1 FRAMER/TRANSCEIVER
Pin Name Type
Pin No.
PQFP PLCC
Function
BRCLK
Input
Input
Input
32
31
77
37
36
8
Backplane Receive Clock (BRCLK).
This clock should be 2.048MHz with
optional gapping for adaptation to
non-uniform backplane data streams.
The E1XC may be configured to
ignore the BRCLK input and use the
RCLKO signal in its place when the
ELST is bypassed.
BRFPI
Backplane Frame Pulse Input
(BRFPI). This input is used to frame
align the received data to the system
backplane. A pulse at least 1 BRCLK
cycle wide must be provided on
BRFPI at multiples of 256 bit periods.
BRFPI is sampled on the rising edge
of BRCLK.
BTPCM/
BTDP
Backplane Transmit PCM (BTPCM).
When the backplane is configured for
single-rail input, the BTPCM inputs
the data stream to be transmitted, and
is sampled on the rising edge of
BTCLK.
Backplane Transmit Positive Line
Pulse (BTDP). When the backplane is
configured for dual-rail input, the
BTDP input by-passes the transmitter
and is fed directly into the DJAT.
BTDP is sampled on the rising edge
of BTCLK.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
26
PMC [ PMC-SIERRA, INC ]
