PM7341 datasheet(40/413 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 Name

Type

No.

Function

RADR[4]

RADR[3]

RADR[2]

RADR[1]

RADR[0]

Input

AA25

AA23

AA24

AA26

Y25

The Receive Address (RADR[4:0]) signals are

used to address the S/UNI-IMA-84 device for the

purposes of polling and selection for cell transfer.

The RADR[4:0] signals are valid only when the

RCSB signal is sampled active in the following

RCLK cycle.

The RADR[4:0] input bus is sampled on the rising

edge of RCLK.

RCSB

Input

Y24

The Receive Chip Select (RCSB) is an active low

signal that is used to select the S/UNI-IMA-84

receive interface. When the RCSB is sampled low, it

indicates that the RADR[4:0] sampled at the

previous clock is a valid address. If the RCSB is

sampled high, the device is not selected and the

RADR[4:0] sampled on the previous cycle is not a

valid address and is ignored. When sufficient

address space is provided by RADR[4:0] for all

devices on the bus, this signal may be tied low.

The RCSB input is sampled on the rising edge of

RCLK.

RSOP

Tristate

Output

W25

The Receive Start of Packet (RSOP) is an active

high signal that marks the start of the cell on the

RDAT[15:0] bus. When RSOP is active, the first

word of the cell is present on the RDAT[15:0] bus.

The RSOP output is updated on the rising edge of

RCLK.

RSX

Tristate

Output

W23

The Receive Start of Transfer (RSX) signal is an

active high signal that marks the first cycle of a data

block transfer on the RDAT[15:0] bus. When the

RSX signal is active, the coinciding data on the

RDAT[15:0] bus represents the in-band PHY

address.

The RSX output is updated on the rising edge of

RCLK.

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