PM7340-PI datasheet(38/334 Pages) PMC

38 / 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

9.2 Transmit Slave Interface (ANY-PHY mode) (30 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 TPA output is updated on the rising edge of

TCLK.

The TENB. TSX, TSOP, TDAT[15:0], TPRTY,

TADR[6:0], and TCSB inputs are sampled on the

rising edge of TCLK.

The TCLK input must cycle at a 52 MHz or lower

instantaneous rate.

TPA

Tristate

Output

L22 The Transmit Packet Available (TPA) is an active

high signal that indicates the availability of space in

the selected logical channel FIFO when polled using

the TADR[6:0] signals.

The S/UNI-IMA-8 device drives TPA with the cell

availability status of the polled port two TCLK cycles

after TADR[6:0] matches the S/UNI IMA’s device

address. The TPA output is high-impedance at all

other times.

The TPA 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.

PM7340-PI Datasheet(PDF) 38 Page - PMC-Sierra, Inc

PM7340-PI Datasheet(HTML) 38 Page - PMC-Sierra, Inc

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