PM5343STXC View Datasheet(PDF) - PMC-Sierra
Part Name
Description
MFG CO.
'PM5343STXC' PDF : 198 Pages View PDF
DATA SHEET
PMC-930303
ISSUE 6
PM5343 STXC
SONET/SDH TRANSPORT OVERHEAD TRANSCEIVER
Pin Name Pin Type Pin Function
No.
TTOHFP Output
156 The transmit transport overhead frame position
(TTOHFP) signal is used to locate the
individual transport overhead bits in the
transport overhead bus, TTOH. TTOHFP is set
high while bit 1 (the most significant bit) of the
first framing byte (A1) is expected in the
incoming stream. TTOHFP is updated on the
falling edge of TTOHCLK.
TTOHCLK Output
153 The transmit transport overhead clock
(TTOHCLK) is nominally a 5.184 MHz (1.728
MHz for STS-1) clock that provides timing for
upstream circuitry that sources the transport
overhead, TTOH. TTOHCLK is a gapped 6.48
MHz clock when accessing the transport
overhead of STS-3/STM-1 streams. TTOHCLK
is a gapped 2.16 MHz clock when accessing
the transport overhead of an STS-1 stream.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA INC., AND FOR ITS CUSTOMERS’ INTERNAL USE 22
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