PM7341 datasheet(45/413 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

TADR[10]

TADR[9]

TADR[8]

TADR[7]

TADR[6]

TADR[5]

TADR[4]

TADR[3]

TADR[2]

TADR[1]

TADR[0]

Input

M25

N24

M26

L25

M24

L26

M23

K25

L24

K26

K23

The Transmit Address (TADR[10:0]) signals are

used to address logical channels for the purpose of

polling and device selection. The TADR[10:0]

signals are valid only when the TCSB signal is

sampled active in the following TCLK cycle.

The TADR[10:0] input bus is sampled on the rising

edge of TCLK.

TCSB

Input

J25

The Transmit Chip Select (TCSB) is an active low

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

transmit interface. When the TCSB is sampled low, it

indicates that the TADR[10:0] sampled at the

previous clock is a valid address. If the TCSB is

sampled high, the device is not selected and the

TADR[10:0] sampled on the previous cycle is not a

valid address and is ignored. When sufficient

address space is provided by TADR[10:0] for all

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

The TCSB is asserted low one cycle after a valid

address is present on the TADR[10:0] signals.

The TCSB input is sampled on the rising edge of

TCLK.

TSOP

Input

K24 The Transmit Start of Packet (TSOP) is an active

high signal that marks the start of the cell on the

TDAT[15:0] bus. When TSOP is active, the first word

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

The TSOP output is sampled on the rising edge of

TCLK.

PM7341 Datasheet(PDF) 45 Page - PMC-Sierra, Inc

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