PM8610 View Datasheet(PDF) - PMC-Sierra, Inc

Part Name

Description

Manufacturer

PM8610

SBI Bus Serializer (SBS)

PMC-Sierra, Inc 

SBS Telecom Standard Product Data Sheet

Preliminary

Pin Name

RC1FP

Type

Input

Pin No.

AF24

Receive SBI336 Interface (14 Signals)

RDATA[7]

Input

B9

RDATA[6]

C10

RDATA[5]

D11

RDATA[4]

B10

RDATA[3]

C11

RDATA[2]

A10

RDATA[1]

B11

RDATA[0]

D12

RDP

Input

A8

Function

Receive Serial Frame Pulse. The receive serial SBI336S frame

pulse signal (RC1FP) provides system timing of the receive serial

interface. When using the receive parallel interface, this signal

indicates the first C1 byte on the bus.

Using the Receive Serial Interface:

When using the receive serial interface, RC1FP is set high once

every multiframe (4 frames for SBI without CAS, 48 frames for SBI

with CAS, and 4 frames for TelecomBus), or multiple thereof. The

RC1FP_DLY[13:0] bits (register 007H) are used to align the C1

frame boundary 8B/10B character on the receive serial interface

(RPWRK/RNWRK and RPPROT/RNPROT) with RC1FP.

Using the Receive Parallel Interface:

In SBI mode, this signal also indicates multiframe alignment which

occurs every 4 frames, therefore this signal is pulsed every fourth

C1 octet to produce a 2KHz multiframe signal. The frame pulse

does not need to be repeated every 2KHz as the SBS will flywheel

in its absence.

When using the SBI bus in synchronous mode the RC1FP signal

can be used to indicate T1 and E1 multiframe alignment by pulsing

on 48 SBI frame boundaries. This must be done if CAS is to be

switched along with the data.

In TelecomBus mode, this signal may also be pulsed to indicate

the J1 byte position and the byte following J1. The J1 byte position

must be locked to an offset of either 0 or 522. The byte following

J1 is used to indicate multiframe alignment and should only pulse

once every 4 frames marking the frame with the V1s.

RC1FP is sampled on the rising edge of SYSCLK.

Receive Data (RDATA[7:0]). This is the receive SBI336 data bus

when configured for SBI336 byte-wide interface instead of the

Serial SBI336S interface. When in TelecomBus mode this is the

data bus for 77.76 MHz TelecomBus. The receive data bus is a

time division multiplexed bus which transports tributaries by

assigning them to fixed octets within the SBI or TelecomBus

structure.

In SBI336 mode, multiple devices can drive this bus at uniquely

assigned tributary columns within the SBI336 bus structure.

RDATA[7:0] is sampled on the rising edge of SYSCLK.

RDATA[7:0] have integral pull-up resistors.

Receive Data Parity (RDP). This is the receive data bus parity

when configured for the Receive byte-wide interface. This signal

carries the even or odd parity for the receive bus signals. In SBI336

mode, the parity calculation encompasses the RDATA[7:0], RPL

and RV5 signals. In TelecomBus mode, the parity calculation

encompasses the RDATA[7:0] and optionally the RC1FP and RPL

signals.

Multiple devices can drive this signal at uniquely assigned tributary

columns within the fixed structure. This parity signal is intended to

detect multiple sources in the column assignment.

RDP is sampled on the rising edge of SYSCLK.

RDP has an integral pull-up resistor.

Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use

30

Document ID: PMC-2000168, Issue 3

Share Link: