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.
TTOHEN Input
152 The transmit transport overhead insert enable
(TTOHEN) signal controls the source of the
transport overhead data which is inserted in
the transmit stream. While TTOHEN is high
during the most significant bit of a TTOH byte
(and TDIS is low), values sampled on the TTOH
input are inserted into the corresponding
transport overhead bit positions (for the A1, A2,
J0, Z0, E1, F1, D1-D3, H3, K1, K2, D4-D12,
Z1, Z2, and E2 bytes). While TTOHEN is low
during the most significant bit of a TTOH byte,
the default values are inserted into these
transport overhead byte positions. A high level
on TTOHEN during most significant bit of TTOH
for the H1, H2, B1, or B2 bytes enables an
error mask. While the error mask is enabled, a
high level on TTOH causes the corresponding
H1, H2, B1 or B2 bit positions to be inverted.
When the section trace enable (STEN) bit is a
logic 1, the J0 byte contents are sourced from
the section trace buffer, regardless of the state
of TTOHEN. A low level on TTOH allows the
corresponding bit positions to pass through the
STXC uncorrupted. TTOHEN is sampled on
the rising edge of TTOHCLK.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA INC., AND FOR ITS CUSTOMERS’ INTERNAL USE 23
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