PM7346 S/UNI-QJET
DATASHEET
PMC-960835
ISSUE 6
SATURN QUAD USER NETWORK INTERFACE FOR J2, E3, T3
Pin Name
Type
Pin No. Function
ROHFP[4]
ROHFP[3]
ROHFP[2]
ROHFP[1]
Output J1
Receive DS3/E3/J2 Overhead Frame
Position (ROHFP[4:1]). ROHFP[4:1]
locates the individual overhead bits in the
received overhead data stream, ROH[4:1].
ROHFP[4:1] is high during the X1
overhead bit position in the ROH[4:1]
stream when processing a DS3 stream.
ROHFP[4:1] is high during the first bit of
the FA1 byte when processing a G.832 E3
stream. ROHFP[4:1] is high during the
RAI overhead bit position when processing
a G.751 E3 stream. ROHFP[4:1] is high
during the first bit in Timeslot 97 in the first
frame of the 4-frame multiframe when
processing a J2 stream. ROHFP[4:1] is
updated on the falling edge of
M2
P2
T2
ROHCLK[4:1].
ROH[4]
ROH[3]
ROH[2]
ROH[1]
Output J2
Receive DS3/E3/J2 Overhead Data
(ROH[4:1]). ROH[4:1] contains the
L2
P1
T1
overhead bits (C, F, X, P, and M) extracted
from the received DS3 stream; ROH[4:1]
contains the overhead bytes (FA1, FA2,
EM, TR, MA, NR, and GC) extracted from
the received G.832 E3 stream; ROH[4:1]
contains the overhead bits (RAI, National
Use, Stuff Indication, and Stuff
Opportunity) extracted from the received
G.751 E3 stream; ROH[4:1] contains the
overhead bits (Framing, X , A, M, E
)
1-5
1-3
extracted from the received J2 stream.
ROH[4:1] is updated on the falling edge of
ROHCLK[4:1].
PMC-SIERRA, INC. PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA INC., AND ITS CUSTOMERS’ INTERNAL USE 35
PMC [ PMC-SIERRA, INC ]
