PM4341AT1XC
DATA SHEET
PMC-900602
ISSUE 7
T1 FRAMER/TRANSCEIVER
Pin
Pin No.
Name
Type
PQFP PLCC Function
BTSIG/
Input
76
7
Backplane Transmit Signalling (BTSIG).
The BTSIG input signal contains the
signalling bits for each channel in the
transmit data frame, repeated for the
entire superframe.This signal is input on
the BTSIG pin when the backplane is
configured for single-rail input. Each
channel's signalling bits are in bit
locations 5,6,7,8 of the channel and are
channel-aligned with the BTPCM data
stream. BTSIG is sampled on the rising
edge of BTCLK.
BTDN
Backplane Transmit Negative Line Pulse
(BTDN). The negative pulse of dual-rail
signal to be transmitted is input on this
pin when the backplane is configured for
dual-rail input. In dual-rail input mode,
the BTDN input by-passes the
transmitter and is fed directly into the
DJAT. BTDN is sampled on the rising
edge of BTCLK.
BTFP
Input
75
6
Backplane Transmit Frame Pulse (BTFP).
This input is used to frame align the
transmitter to the system backplane. If
frame alignment only is required, a pulse
at least 1 BTCLK cycle wide must be
provided on BTFP every 193 bit times. If
superframe alignment is required,
transmit superframe alignment must be
enabled, and a pulse at least 1 BTCLK
cycle wide must be provided on BTFP
every 12 or 24 frame times.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
25
PMC [ PMC-SIERRA, INC ]
