The value of the address must be aligned to the data width.

Interconnect fabric based on Avalon MM interfaces supports Any number of master and slave components The master-to-slave relationship can be one-to-one, one-to-many, many-to-one, or many-to-many Connection to both on- and off-chip devices (microprocessors, memories, UARTs, DMAs, timers,вЂ¦) Master and slaves of different data widths Components operating in different clock domains Components using multiple Avalon-MM portsД®xample of a Avalon MM-based interconnect fabric systemД®xample of an Avalon MM slave component (Write operation on a PIO peripheral)ДЎ2 Avalon MM Signals (1) Each signal has a roleДЄn Avalon MM may contain only a restricted number of available signals Common signal roles are: address, writedata chipselect (chipselect_n), read (read_n), write(write_n),вЂ¦ readdata waitrequest (waitrequest_n)ДЎ3 Avalon MM Signals (2) Address (Master -> Slave)ДЇor masters, the address signal represents a byte address. the clockRate property of the Avalon Clock interface provides the frequency of a clock signal.

Avalon interfaces use properties to describe their behavior. Active-low signal alternatives are permitted for many signal roles.

With the exception of Avalon Conduit interfaces, each interface may include only one signal for each signal role. Many signal roles are optional, allowing component designers the flexibility to select only the signal roles necessary to implement the required functionality. Multiple peripherals can share pins through signal multiplexing, reducing the pin count of the FPGA (and the number of traces on the PCB)Д¦ Example of component interconnections within a Nios II systemДЁ Avalon interfaces (3) Each of the Avalon interfaces defines a number of signal roles and their behavior. Interconnect and logic resources to manage whole connectivity among all components in an Altera SoPC system Is automatically generated by Qsys Components must comply with the standardized AvalonВ® interfaces, which are specialized for: Reading and writing registers and memory Streaming high-speed data Controlling off-chip devicesД¬ustom logic can interact with a Computer system by: an Avalon interface, so that it can be part of the SoPC a generic interface, which can be connected to a PIO peripheral inside the SoPCД¤ Avalon interfaces (1) Avalon Memory Mapped Interface (Avalon-MM)ДЄn address-based read/write interface typical of masterвЂ“slave connections Avalon Streaming Interface (Avalon-ST) Supports unidirectional flow of data, including multiplexed streams, packets, and DSP data Avalon Interrupt Interface (Sender/Receiver) An interface that allows components to signal events to other componentsДҐ Avalon interfaces (2) Avalon Clock Interface Avalon Reset InterfaceДЄn interface that drives or receives clocks (all Avalon interfaces are synchronous) Avalon Reset Interface An interface that provides reset connectivity Avalon Conduit Interface An interface type that accommodates individual signals or groups of signals that do not fit into any of the other Avalon interfaces Avalon Tri-State Conduit Interface (Avalon-TC) An interface to support connections to off-chip peripherals. SISTEMI EMBEDDED System Interconnect Fabric Federico Baronti Last version: Presentation on theme: 'System Interconnect Fabric'- Presentation transcript:

Dsp builder conduits or streaming