PM5345 S/UNI-155
DATA SHEET
PMC-930305
ISSUE 4
SATURN USER NETWORK INTERFACE
Pin Name Type
Pin
Function
No.
When the byte serial receive interface is
selected (RSER=0), the FPOS/MLT input
selects the frame byte position in the SONET
frame indicated by the FPIN input. When
FPOS/MLT is tied high, a pulse on FPIN marks
the third A2 framing byte position on the
PIN[7:0] bus. When FPOS/MLT is tied low, a
pulse on FPIN marks the first synchronous
payload envelope byte position after the three
C1 bytes on PIN[7:0].
When the bit serial transmit interface is
selected (TSER=1), the FPOS/MLT input
selects MLT-3 encoding of the transmit stream.
When FPOS/MLT is tied high, an MLT-3
encoded data stream is transmitted on the
TXCO+/- and TXD+/- outputs. When
FPOS/MLT is tied low, 155 Mbit/s clock and
data are inserted on the TXCO+/- and TXD+/-
outputs.
FPIN
Input
157
The active high framing position input (FPIN)
signal indicates the SONET frame position on
the PIN[7:0] bus. The byte position indicated
by FPIN is selected by the FPOS/MLT input as
described above. FPIN is sampled on the
rising edge of PICLK.
OOF
Output 32
The out of frame (OOF) signal is high while the
S/UNI is out of frame. OOF is low while the
S/UNI is in-frame. An out of frame occurs
when 4 consecutive errored framing patterns
(A1 and A2 bytes) have been received. OOF
is intended to be used to enable an upstream
framing pattern detector to search for the
framing pattern when the byte serial interface
is selected. This alarm indication is also
available via register access. OOF is updated
on the falling edge of RCLK.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
18
PMC [ PMC-SIERRA, INC ]
