PM7341 datasheet(39/413 Pages) PMC

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PRELIMINARY

INVERSE MULTIPLEXING OVER ATM

PM7341 S/UNI-IMA-84

DATASHEET

PMC-2000223

ISSUE 4

INVERSE MULTIPLEXING OVER ATM

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

PIN DESCRIPTION

9.1 Receive Slave ATM Interface (Any-PHY mode) (28 Signals)

Pin Name

Type

No.

Function

RCLK

Input

W24

The Receive Clock (RCLK) signal is used to

transfer data blocks from the S/UNI-IMA-84 across

the receive Any-PHY interface.

The RPA, RSOP, RSX, RDAT[15:0], and RPRTY

outputs are updated on the rising edge of RCLK.

The RENB, RADR[4:0], and RCSB inputs are

sampled on the rising edge of RCLK.

The RCLK input must cycle at a 52 MHz or lower

instantaneous rate.

RPA

Tristate

Output

AB24 The Receive Packet Available (RPA) is an active

high signal that indicates whether at least one cell is

queued for transfer.

The S/UNI-IMA-84 device drives the RPA with the

cell availability status two RCLK cycles after

RADR[4:0] matches the S/UNI IMA’s device

address. The RPA output is high-impedance at all

other times.

The RPA output is updated on the rising edge of

RCLK.

RENB

Input

AB26 The Receive Enable Bar (RENB) is an active low

signal used to initiate the transfer of cells from the

S/UNI-IMA-84 to an ATM layer component, such as

a traffic management device.

The RENB input is sampled on the rising edge of

RCLK.

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