PM7346 S/UNI-QJET
DATASHEET
PMC-960835
ISSUE 6
SATURN QUAD USER NETWORK INTERFACE FOR J2, E3, T3
Pin Name
Type
Pin No. Function
TOHFP[4]
TOHFP[3]
TOHFP[2]
TOHFP[1]
Output J3
Transmit DS3/E3/J2 Overhead Frame
Position (TOHFP[4:1]). TOHFP[4:1] is
used to align the individual overhead bits
in the transmit overhead data stream,
TOH[4:1], to the DS3 M-frame or the E3
frame. For DS3, TOHFP[4:1] is high
during the X1 overhead bit position in the
TOH[4:1] stream. For G.832 E3,
L3
N3
R3
TOHFP[4:1] is high during the first bit of
the FA1 byte. For G.751 E3, TOHFP[4:1]
is high during the RAI overhead bit
position in the TOH[4:1] stream. For J2,
TOHFP[4:1] is high during the first bit of
timeslot 97 in the first frame of a 4-frame
multiframe). TOHFP[4:1] is updated on the
falling edge of TOHCLK[4:1].
TOHCLK[4]
TOHCLK[3]
TOHCLK[2]
TOHCLK[1]
Output H2
Transmit DS3/E3/J2 Overhead Clock
(TOHCLK[4:1]). TOHCLK[4:1] is active
when a DS3, E3, or J2 stream is being
processed. TOHCLK[4:1] is nominally a
526 kHz clock for DS3, a 1.072 MHz clock
for G.832 E3, a 1.074 MHz clock for G.751
E3, and a gapped 6.312 MHz clock with
an average frequency of 168 kHz for J2.
TOHFP[4:1] is updated on the falling edge
of TOHCLK[4:1]. TOH[4:1], and
K1
N2
R2
TOHINS[4:1] are sampled on the rising
edge of TOHCLK[4:1].
PMC-SIERRA, INC. PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA INC., AND ITS CUSTOMERS’ INTERNAL USE 28
PMC [ PMC-SIERRA, INC ]
