PM4328-PI PMC-Sierra, Inc., PM4328-PI Datasheet - Page 40

• Manufacturer Part Number: PM4328-PI
• Description: Framer, T1|E1|T3 Standard Format, 324-BGA
• Manufacturer: PMC-Sierra, Inc.

STANDARD PRODUCT
DATASHEET
PMC-2011596
Pin Name
TPOS/TDAT
TNEG/TMFP
TICLK
PROPRIETARY AND CONFIDENTIAL
Type
Output AB7 Transmit Positive Pulse (TPOS). TPOS represents
Output W6
Input
ISSUE 1
Pin
No.
AA6 Transmit input clock (TICLK). TICLK provides the
Function
the positive pulses transmitted on the B3ZS-encoded
DS3 line when dual-rail output format is selected.
Transmit Data Output (TDAT). TDAT represents the
NRZ (unipolar) DS3 output data stream when single
rail output format is selected.
TPOS and TDAT are updated on the falling edge of
TCLK by default but may be enabled to be updated on
the rising edge of TCLK by setting the TRISE bit in the
DS3 Master Transmit Line Options register. TPOS and
TDAT are updated on TICLK rather than TCLK when
the TICLK bit in the DS3 Master Transmit Line Options
register is set.
Transmit Negative Pulse (TNEG). TNEG represents
the negative pulses transmitted on the B3ZS-encoded
DS3 line when dual-rail output format is selected.
Transmit Multiframe Pulse (TMFP). This signal
marks the transmit M-frame alignment when
configured for single rail operation. TMFP indicates
the position of overhead bits in the transmit
transmission system stream, TDAT. TMFP is high
during the first bit (X1) of the multiframe.
TNEG and TMFP are updated on the falling edge of
TCLK by default but may be enabled to be updated on
the rising edge of TCLK by setting the TRISE bit in the
DS3 Master Transmit Line Options register. TNEG and
TMFP are updated on TICLK rather than TCLK when
the TICLK bit in the DS3 Master Transmit Line Options
register is set.
transmit direction timing. TICLK is nominally a 44.736
MHz, 50% duty cycle clock.
This clock is only required when using the DS3
transmitter with the DS3 line side interface. When not
used this clock input should be connected to ground.
27
HIGH DENSITY T1/E1 FRAMER
AND M13 MULTIPLEXER
PM4328 TECT3