PM7341 datasheet(47/413 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

9.4 Transmit Slave Interface (UTOPIA L2 mode) (26 Signals)

Pin Name

Type

No.

Function

TCLK

Input

F25

The Transmit Clock (TCLK) signal is used to

transfer cells across the ANY-PHY interface to the

internal downstream cell buffers.

The TCA output is updated on the rising edge of

TCLK.

The TENB, TSOC, TDAT[15:0], TPRTY, TADR[4:0]

inputs are sampled on the rising edge of TCLK.

The TCLK input must cycle at a 52 MHz or lower

instantaneous rate.

TCA

Tristate

Output

N26

The Transmit Cell Available (TCA) is an active high

signal that indicates the availability of space in the

selected logical channel FIFO when polled using the

TADR[4:0] signals.

The S/UNI-IMA-84 drives TCA with the cell space

availability status for the polled port on TCLK cycles

after a valid TADR[4:0} address is sampled.

The TCA output is high-impedance when not polled.

The TCA output is updated on the rising edge of

TCLK.

TENB

Input

P24

The Transmit enable bar (TENB) is an active low

signal that is used to indicate cell transfers to the

internal cell buffers.

The TENB input is sampled on the rising edge of

TCLK.

TADR[4]

TADR[3]

TADR[2]

TADR[1]

TADR[0]

Input

M23

K25

L24

K26

K23

The Transmit Address (TADR[4:0]) signals are

used to address logical channels for the purposes of

polling and device selection.

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

edge of TCLK.

PM7341 Datasheet(PDF) 47 Page - PMC-Sierra, Inc

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