SBI Bus Serializer ASSP Telecom Standard Product Data Sheet
Released
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2000168, Issue 5
42
Pin Name
Type
Pin
No.
Function
For locked TVTs, this signal must either be driven in the
same manner as for floating TVTs or held low.
In Telecom Bus mode:
This signal identifies tributary payload frame boundaries
on the corresponding incoming data bus. IV5[x] is set
high to mark the V5 bytes on the bus.
IV5[1] can be part of either a 19.44MHz SBI or Telecom
Bus when combined with IV5[4:2] or can be used as
part of a standalone 77.76MHz SBI336 or Telecom Bus.
IV5[x] is sampled on the rising edge of SREFCLK.
IV5[4:2] have integral pull-up resistors.
ITPL[4]
ITPL[3]
ITPL[2]
ITPL[1]
Input
R26
AD9
Y24
F1
Incoming Tributary Payload (ITPL[4:1]).
This signal is
used to indicate tributary payload when configured for
Telecom Bus and is unused when configured for SBI or
SBI336 buses.
ITPL[x] is set high during valid VC11 and VC12 bytes of
the corresponding Incoming bus. ITPL[x] is set low for
all transport overhead bytes, high order path overhead
bytes, fixed stuff column bytes and tributary transport
overhead bytes (V1,V2,V3,V4).
ITPL[1] can be part of either a 19.44MHz Telecom Bus
when combined with ITPL[4:2] or can be used as part of
a standalone 77.76MHz Telecom Bus.
ITPL[x] is sampled on the rising edge of SREFCLK.
ITPL[4:2] have integral pull-up resistors.
ITAIS[4]
ITAIS[3]
ITAIS[2]
ITAIS[1]
Input
R25
AC10
W26
H2
Incoming Tributary Alarm Indication Signal
(ITAIS[4:1]).
This signal indicates tributaries in low
order path AIS state for the corresponding Incoming
Telecom Bus and is unused when configured for SBI or
SBI336 buses.
ITAIS[x] is set high when the tributary on the
corresponding Incoming bus is in AIS state and is set
low when the tributary is out of AIS state.
ITAIS[1] can be part of either a 19.44MHz Telecom Bus
when combined with ITAIS[4:2] or can be used as part
of a standalone 77.76MHz Telecom Bus.
ITAIS[x] is sampled on the rising edge of SREFCLK.
ITAIS[4:2] have integral pull-up resistors.
Transmit Serial Data Interface (4 Signals)
TPWRK
TNWRK
Analog
LVDS
Output
K26
K25
Transmit Working Serial Data.
In SBI336 mode, the
differential transmit working serial data link
(TPWRK/TNWRK) carries a transmit 77.76Mhz SBI336
data stream to a downstream working sink, in bit serial
format, SBI336S.
In Telecom bus mode, TPWRK/TNWRK carries the
transmit 77.76MHz Telecom bus data stream to a
downstream working sink, in bit serial format.
Data on TPWRK/TNWRK is encoded in an 8B/10B
format extended from IEEE Std. 802.3. The 8B/10B