PM4318-BI データシートの表示（PDF） - PMC-Sierra

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PM4318-BI

OCTAL E1/T1/J1 LINE INTERFACE DEVICE

PMC-Sierra 

PRELIMINARY

DATASHEET

PMC- 2001578

Pin Name

ADP/TDN[4]

APL/TDN[5]

AV5/TDN[6]

ISSUE 3

PM4318 OCTLIU

OCTAL E1/T1/J1 LINE INTERFACE DEVICE

Type

Input

Input

Input

Pin Function

No.

W18

AA1

V4

The SBI ADD bus parity signal (ADP) carries the even or odd

parity for the ADD bus signals. The parity calculation

encompasses the ADATA[7:0], APL and AV5 signals.

Multiple devices can drive the SBI ADD bus at uniquely assigned

tributary column positions. This parity signal is intended to detect

accidental driver clashes in the column assignment.

ADP is sampled on the rising edge of REFCLK.

ADP shares the same pin as the TDN[4] input. ADP is selected

when SBI_EN or SBI2CLK is tied high.

The SBI ADD bus payload signal (APL) indicates valid data within

the SBI TDM bus structure. This signal is asserted during all

octets making up a tributary. This signal may be asserted during

the V3 octet within a tributary to accommodate negative timing

adjustments between the tributary rate and the fixed TDM bus

structure. This signal may be deasserted during the octet

following the V3 octet within a tributary to accommodate positive

timing adjustments between the tributary rate and the fixed TDM

bus structure.

APL is sampled on the rising edge of REFCLK.

APL shares the same pin as the TDN[5] input. APL is selected

when SBI_EN or SBI2CLK is tied high.

The SBI ADD bus payload indicator signal (AV5) locates the

position of the floating payloads for each tributary within the SBI

TDM bus structure. Timing differences between the port timing

and the TDM bus timing are indicated by adjustments of this

payload indicator relative to the fixed TDM bus structure. All

movements indicated by this signal must be accompanied by

appropriate adjustments in the APL signal.

AV5 is sampled on the rising edge of REFCLK.

AV5 shares the same pin as the TDN[6] input. AV5 is selected

when SBI_EN or SBI2CLK is tied high.

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

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