Opencore plus time-out behavior, Opencore plus time-out behavior –13 – Altera RapidIO MegaCore Function User Manual
Page 21
Chapter 1: About This MegaCore Function
1–13
Installation and Licensing
August 2014
Altera Corporation
RapidIO MegaCore Function
User Guide
OpenCore Plus Time-Out Behavior
OpenCore Plus hardware evaluation supports the following two operation modes:
■
Untethered—the design runs for a limited time.
■
Tethered—requires a connection between your board and the host computer. If
tethered mode is supported by all megafunctions in a design, the device can
operate for a longer time or indefinitely.
All megafunctions in a device time out simultaneously when the most restrictive
evaluation time is reached. If there is more than one megafunction in a design, a
specific megafunction's time-out behavior may be masked by the time-out behavior of
the other megafunctions.
1
For Altera IP cores, the untethered time-out is 1 hour; the tethered time-out value is
indefinite.
Your design stops working after the hardware evaluation time expires.
The RapidIO IP core then suppresses all packet transfers through the Physical layer.
As a result, the RapidIO IP core cannot transmit new packets (it only transmits the
idle sequence and status control symbols), and cannot read packets from the Physical
layer. If the remote link partner continues to transmit packets, the RapidIO IP core
refuses new packets by sending packet_retry control symbols after its receiver
buffer fills up beyond the corresponding threshold.
f
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Installation and licensing
Open Core Plus