PM6341 E1XC
DATA SHEET
PMC-910419
ISSUE 8
E1 FRAMER/TRANSCEIVER
Table 3
-TransmitTiming Options
InputTransmit Bit Settings
Data
XCLK Freq
Effect on Output
Transmit Data
Backplane
HSBPSEL =0
XCLKSEL =0
OCLKSEL1 =0
OCLKSEL0 =0
49.152MHz
Jitter attenuated.
TCLKO is a
smooth 2.048
MHz.
transmit data
timed to 2.048
MHz BTCLK.
TCLKO
referenced to
BTCLK.
PLLREF1
PLLREF0
=0
=X
TCLKO
referenced to
RCLKO.
TCLKISEL =0
SMCLKO
PLLREF1
PLLREF0
PLLREF1
PLLREF0
=0
=1
=0
=1
=1
TCLKO
referenced to
TCLKI.
Backplane
transmit data
timed to
>2.048MHz
backplane
clock. BTCLK
is externally
"gapped".
HSBPSEL =1
XCLKSEL =0
OCLKSEL1 =0
OCLKSEL0 =0
49.152MHz
Jitter attenuated.
TCLKO is a
smooth
2.048MHz.
TCLKO
referenced to
externally
"gapped" transmit
clock.
PLLREF1
PLLREF0
=0
=X
TCLKISEL =0
TCLKO
referenced to
RCLKO.
SMCLKO
PLLREF1
PLLREF0
PLLREF1
PLLREF0
=0
=1
=0
=1
=1
TCLKO
referenced to
TCLKI.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
86
PMC [ PMC-SIERRA, INC ]
