PM7345 datasheet(49/306 Pages) PMC

49 / 306 page

PM7345 S/UNI-PDH

DATA SHEET

PMC-931011

ISSUE 6

SATURN USER-NETWORK INTERFACE

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE

TDLSIG

Input

n/a

Transmit Data Link Signal (TDLSIG). In DS3

mode, TDLSIG contains the Path Maintenance Data

Link signal that may be inserted in the C-bit Parity

DS3 stream if the TNETOP bit in the S/UNI-PDH

Data Link Control register is set to logic one. In E3

G.832 mode, TDLSIG contains the NR or GC data

link signal, as selected by the TNETOP bit, that may

be inserted in the transmit G.832 E3 stream. In E3

G.751 mode, TDLSIG contains the National Use bit

that may be inserted in the G.751 E3 stream if the

TNETOP bit is set to logic one. TDLSIG is sampled

on the rising edge of TDLCLK. TDLSIG contains an

integral pull-up resistor.

TDLCLK

Output

n/a

Transmit Data Link Clock (TDLCLK). TDLCLK is

active when a DS3 or E3 G.751 stream is being

processed, if the TNETOP bit in the S/UNI-PDH

Data Link Control register is set to logic one.

TDLCLK is active when an E3 G.832 stream is

being processed, independent of the TNETOP bit.

TPOHCLK

Output

Transmit PLCP Overhead Clock (TPOHCLK).

TPOHCLK is active when PLCP processing is

enabled. TPOHCLK 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 is updated on the

falling edge of TPOHCLK. TPOH, and TPOHINS

are sampled on the rising edge of TPOHCLK.

TPOH

Input

Transmit PLCP Overhead Data (TPOH). TPOH

contains the PLCP path overhead octets (Zn, F1,

B1, G1, M1, M2, and C1) which may be inserted in

the transmit PLCP frame. The octet data on TPOH

is shifted in order from the most significant bit (bit 1)

to the least significant bit (bit 8).TPOH is sampled

on the rising edge of TPOHCLK.

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