Altera SerialLite II IP Core Instrukcja Użytkownika Pobierz pdf (Strona 56)

4–2 Chapter 4: Functional Description

Interface Overview

SerialLite II MegaCore Function January 2014 Altera Corporation

User Guide

Atlantic Interface

The Atlantic interface provides a standard mechanism for delivering data to, and

accepting data from, the SerialLite II MegaCore function. It is a full-duplex,

synchronous point-to-point connection interface that supports a variety of data

widths.

The width of the Atlantic interface is determined by the number of lanes and the

transfer size.

The SerialLite II MegaCore function allows you to create one or two data ports: one

for regular data and one for priority data. Each of these ports has a full Atlantic

interface. Also, in the transmit direction of each type of port, an Atlantic dual clock

domain FIFO buffer is implemented. The receiver dual clock domain Atlantic FIFO

buffer is optional.

The SerialLite II MegaCore function is an Atlantic interface slave when the Atlantic

FIFO buffer is implemented (when the function is not in streaming mode, and the

buffer size is not zero). Otherwise, the SerialLite II MegaCore function is an Atlantic

interface master. This user guide refers to the logic that drives data into the

SerialLite II MegaCore function or receives data from the SerialLite II MegaCore

function as the system logic.

Figure 4–2 shows how the data packets are transmitted and received through the

Atlantic interface.

Figure 4–2. Transmitting and Receiving SerialLite II Data Packets

Transmitter

01 02

01 02 03

Receiver

clk

txrdp_sop

txrdp_eop

txrdp_dat

txrdp_adr

txrdp_dav

txrdp_ena

rxrdp_sop

rxrdp_eop

rxrdp_adr

rxrdp_dat

rxrdp_dav

1 2 ... 51 52 53 54 55 56 57 58 59 60 61 ... 109 110

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Altera SerialLite II IP Core Instrukcja Użytkownika Strona 56