PM5366-PI datasheet(47/267 Pages) PMC

47 / 267 page

PRELIMINARY

PM5366 TEMAP-84

DATASHEET

PMC-2010672

ISSUE 1

HIGH DENSITY 84/63 CHANNEL VT/TU MAPPER

AND M13 MULTIPLEXER

PROPRIETARY AND CONFIDENTIAL

Pin Name

Type

No.

Function

EFBWCLK[3]

EFBWCLK[2]

EFBWCLK[1]

Input

P22

M22

J22

The Egress Flexible Bandwidth Clocks

(EFBWCLK[3:1]). The EFBWCLK[3:1] clocks provide

the timing for an arbitrary bandwidth payload extracted

from the System Add Bus (SADATA[7:0]). Each clock

is associated with one SPE and is only used when the

associated SPE is configured to carry a fractional

payload by the OPMODE_SPEx[2:0] bits of the SPE

Configuration registers.

EFBWCLK[3:1] may have a maximum frequency of

51.84 MHz and may be gapped if required.

Each EFBWCLK samples the associated EBWDREQ

on the rising edge and updates the associated

EFBWDAT] and EFBWEN on the falling edge.

EFBWDREQ[3]

EFBWDREQ[2]

EFBWDREQ[1]

Input

P21

M21

J19

The Egress Flexible Bandwidth Data Requests

(EFBWREQ[3:1]). The data request input must be

asserted high for a EFBWCLK cycle for each bit of

data required. In response to sampling

EFWBDREQ[3:1] high, the associated EFBWDAT

output will either present an available bit a cycle later

with an accompanying assertion of the associated

EFBWEN or ignore the request if no data is ready. In

many applications (eg. frame relay and ATM), every

request will be acknowledged with data. In

applications where the source data is fixed, it is

permissible to hold EFBWDREQ[3:1] high, in which

case EFBWEN identifies valid bytes.

EFBWDREQ[3:1] are sampled on the rising edge of

the associated EFBWCLK input.

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