PM7326 datasheet(45/238 Pages) PMC

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PM7326 S/UNI APEX

DATA SHEET

PMC-1981224

ISSUE 6

ATM/PACKET TRAFFIC MANAGER AND SWITCH

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

Pin Name

Type

No.

Function

WRADR[0]

WRADR[2]

Output

(Master)

Input

(Slave)

WAN Receive Address. The WRADR[2:0] signals

are used to address up to four Physical layer

devices for the purposes of polling and device

selection.

This pin is in Hi-Z when the WAN receive interface

is not enabled.

If UL2 or Any-PHY receive master mode is selected,

this bus is an output. WRADR[2:0] selects a device

for polling by applying the device address N

WRCLK cycles prior to sampling WRPA. If the PHY

device selected is a UTOPIA device, N=1. If the

PHY device selected is an Any-PHY device, N=2.

When supporting multiple PHYs, WRADR will insert

1 NULL address between address changes.

If UL1 master mode is selected, this bus is driven to

a high NULL address.

WRADR[2:0] selects a device to transfer a data

block when the WRENB is last sampled high. The

start of data block transfer must occur 1 or 2

WRCLK cycles after device selection occurs.

WRADR[2:0] = 7 hex is used as the NULL address.

No PHY device can match the NULL address.

If slave mode is selected, this signal is an input and

the S/UNI APEX plays the roll of a single port

UTOPIA L2 slave device driving the WRPA 1

WRCLK after the WRADR[1:0] matches the

programmed WANRxSlaveAddr register, and

WRADR[2] is zero.

WRADR[2:0] is sampled/updated on the rising edge

of WRCLK.

WRSX

Input

WAN Receive Start of Transfer. WRSX is asserted

by the selected PHY device during the first cycle of

a data block transfer coinciding with the port

address prepend. WRSX is ignored during cell

transfers from UTOPIA or SCI-PHY devices.

WRSX is updated on the rising edge of WRCLK.

PM7326 Datasheet(PDF) 45 Page - PMC-Sierra, Inc

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