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STANDARD PRODUCT
PM8315 TEMUX
DATASHEET
PMC-1981125
ISSUE 7
HIGH DENSITY T1/E1 FRAMER WITH
INTEGRATED VT/TU MAPPER AND M13 MUX
PROPRIETARY AND CONFIDENTIAL
33
Pin Name
Type
Pin
No.
Function
TPOS/TDAT
Output AB7
Transmit Positive Pulse (TPOS).
TPOS
represents
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.
TNEG/TMFP
Output W6
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.
TICLK
Input
AA6
Transmit input clock (TICLK).
TICLK provides the
transmit direction timing. TICLK is nominally a 44.736
MHz, 50% duty cycle clock.
This clock is only required when using the DS3
transmitter, either with the DS3 line side interface or
the DS3 mapper. When not used this clock input
should be connected to ground.