PM7346 Datasheet, PDF (54/419 Pages) PMC-Sierra, Inc – SATURN QUAD USER NETWORK INTERFACE FOR J2, E3, T3

DATASHEET
PMC-960835
ISSUE 6
PM7346 S/UNI-QJET
SATURN QUAD USER NETWORK INTERFACE FOR J2, E3, T3
Pin Name Type
TPOHCLK[4]
TPOHCLK[3]
TPOHCLK[2]
TPOHCLK[1]
Output
TIOHM[4]
TIOHM[3]
TIOHM[2]
TIOHM[1]
Input
Pin No.
U13
V11
V8
U6
W15
V12
V9
V6
Function
Transmit PLCP Overhead Clock
(TPOHCLK[4:1]). TPOHCLK[4:1] is active
when PLCP processing is enabled.
TPOHCLK[4:1] is nominally a 26.7 kHz
clock for a DS1 PLCP frame, a 768 kHz
clock for a DS3 PLCP frame, a 33.7 kHz
clock for an E1 based PLCP frame, and a
576 kHz clock for an G.751 E3 based
PLCP frame. TPOHFP[4:1] is updated on
the falling edge of TPOHCLK[4:1].
TPOH[4:1], and TPOHINS[4:1] are
sampled on the rising edge of
TPOHCLK[4:1].
Transmit Input Overhead Mask
(TIOHM[4:1]). TIOHM[4:1] is valid only if
the FRMRONLY bit in the S/UNI-QJET
Configuration 1 register is logic 0.
TIOHM[4:1] indicates the position of
overhead bits when not configured for
DS1, DS3, E1, E3, or J2 transmission
system streams. TIOHM[4:1] is delayed
internally to produce the TOHM[4:1]
output. When configured for operation
over a DS1, a DS3, an E1, an E3, or a J2
transmission system sublayer, TIOHM[4:1]
is not required, and should be set to logic
0. When configured for other transmission
systems, TIOHM[4:1] is set to logic 1 for
each overhead bit position. TIOHM[4:1] is
set to logic 0 if the transmission system
contains no overhead bits. TIOHM[4:1] is
sampled on the rising edge of TICLK[4:1].
PMC-SIERRA, INC. PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA INC., AND ITS CUSTOMERS’ INTERNAL USE 33