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.
TDIS
TTOH
Input
Input
151 The active high transmit disable (TDIS) signal
selectively disables overwriting the STS-1 or
STS-3 (STM-1) byte serial stream with the
corresponding overhead byte. TDIS is sampled
on the rising edge of TICLK. TDIS takes
precedence over the TTOHEN and TTOH
inputs.
In general, the value on TIN[7:0] passes
through transparently if TDIS is high. Three
exceptions exist:
1.) Bits 6 to 8 of the K2 byte may be overwritten
by a active RDI indication ("110") regardless of
the state of TDIS.
2.) If TDIS is high during the section BIP byte
(B1), the TIN[7:0] value becomes an error
mask for the generated section BIP.
3.) If TDIS is high during the line BIP bytes
(B2), and the DB2 bit in the TLOP Control
register is logic 0, the TIN[7:0] value becomes
an error mask for the generated line BIP.
155 The transmit transport overhead bus (TTOH)
contains the transport overhead bytes (A1, A2,
J0, Z0, E1, F1, D1-D3, H3, K1, K2, D4-D12,
Z1, Z2, and E2) and error masks (H1, H2, B1,
and B2) which may be inserted, or used to
insert bit interleaved parity errors or payload
pointer bit errors into the overhead byte
positions in the outgoing stream. Insertion is
controlled by the TTOHEN input. TTOH is
sampled on the rising edge of TTOHCLK.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA INC., AND FOR ITS CUSTOMERS’ INTERNAL USE 21
Share Link: 
