Altera RapidIO MegaCore Function Manuel d'utilisateur Page 11

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Chapter 1: About This MegaCore Function 1–3
Features
August 2014 Altera Corporation RapidIO MegaCore Function
User Guide
Physical layer features
1x/2x/4x serial with integrated transceivers in selected device families and
support for external transceivers in older device families
All four standard serial data rates supported: 1.25, 2.5, 3.125, and 5.0 gigabaud
(Gbaud)
Receive/transmit packet buffering, flow control, error detection, packet
assembly, and packet delineation
Automatic freeing of resources used by acknowledged packets
Automatic retransmission of retried packets
Scheduling of transmission, based on priority
Reset controller—fatal error does not require manual resetting
Optional automatic resetting of link partner after detection of fatal errors
Support for synchronizing with link partner’s expected ackID after reset
Full control over integrated transceiver parameters
Configurable number of recovery attempts after link response time-out before
declaring fatal error
Transport layer features
Supports multiple Logical layer modules
A round-robin outgoing scheduler chooses packets to transmit from various
Logical layer modules
Logical layer features
Generation and management of transaction IDs
Automatic response generation and processing
Request to response time-out checking
Capability registers (CARs) and command and status registers (CSRs)
Direct register access, either remotely or locally
Maintenance master and slave Logical layer modules
Input/Output Avalon
®
Memory-Mapped (Avalon-MM) master and slave
Logical layer modules with burst support
Avalon streaming (Avalon-ST) interface for custom implementation of message
passing
Doorbell module supporting 16 outstanding
DOORBELL
packets with time-out
mechanism
Support for preservation of transaction order between outgoing
DOORBELL
messages and I/O write requests
New registers and interrupt indicate NWRITE_R transaction completion
Support for preservation of transaction order between outgoing I/O read
requests and I/O write requests from Avalon-MM interfaces
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