PM7340-PI datasheet(41/334 Pages) PMC

41 / 334 page

PRELIMINARY

INVERSE MULTIPLEXING OVER ATM

PM7340 S/UNI-IMA-8

DATA SHEET

PMC-2001723

ISSUE 3

INVERSE MULTIPLEXING OVER ATM

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

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

Pin Name

Type

No.

Function

TCLK

Input

E19

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

L22

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-8 drives TCS with the cell space

availability status for the polled port one TCLK cycle

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

L20

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

K21

K20

J19

J22

J21

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.

PM7340-PI Datasheet(PDF) 41 Page - PMC-Sierra, Inc

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