PM7339 查看數據表（PDF） - PMC-Sierra

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PM7339

SATURN USER NETWORK INTERFACE FOR QUAD CELL DELINEATION BLOCK

PMC-Sierra 

RELEASED

DATASHEET

PMC-2000313

ISSUE 2

PM7339 S/UNI-CDB

SATURN USER NETWORK INTERFACE CELL DELINEATION BLOCK

Pin Name

TCELL[4]

TCELL[3]

TCELL[2]

TCELL[1]

Type

Output

TPOHCLK[4]

TPOHCLK[3]

TPOHCLK[2]

TPOHCLK[1]

Output

TIOHM[4]

TIOHM[3]

TIOHM[2]

TIOHM[1]

Input

Pin No.

W14

Y10

Y7

V5

U13

V11

V8

U6

W15

V12

V9

V6

Function

Transmit Cell Indication (TCELL[4:1]).

TCELL[x] is valid when the TCELL bit in

the S/UNI-CDB Misc. register (09BH,

19BH, 29BH, 39BH) is set. TCELL[x]

pulses once for every cell (idle or

assigned) transmitted. TCELL[x] is

updated using timing derived from the

transmit input clock (TICLK[x]), and is

active for a minimum of 8 TICLK[x] periods

(or 8 RCLK[x] periods if loop-timed).

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 and a 33.7

kHz clock for an E1 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] indicates the

position of overhead bits when not

configured for DS1 or E1 transmission

system streams. TIOHM[4:1] is delayed

internally to produce the TOHM[4:1]

output. When configured for operation

over a DS1 or an E1 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 17

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