ii Altera Corporation
Avalon Interface Specifications
Table of Contents
4.1.2. Interrupt Sender Properties ................................................................................................4–2
4.2. Interrupt Receiver ...............................................................................................................................4–2
4.2.1. Interrupt Receiver Properties .............................................................................................4–3
4.2.2. Signal Types ..........................................................................................................................4–3
4.2.3. Interrupt Timing ...................................................................................................................4–3
5.1. Tristate Slave Signal Types ................................................................................................................5–2
5.1.1. address Behavior ..................................................................................................................5–3
5.1.2. outputenable and read Behavior ........................................................................................5–4
5.1.3. write_n and writebyteenable Behavior .............................................................................5–4
5.1.4. Interfacing to Synchronous Off-Chip Memory ................................................................5–5
5.2. Tristate Slave Properties ....................................................................................................................5–6
5.3. Slave Transfers ....................................................................................................................................5–6
5.3.1. Asynchronous Transfers .....................................................................................................5–6
5.3.1.1. Setup Time .................................................................................................................. 5–7
5.3.1.2. Hold Time ................................................................................................................... 5–8
5.3.1.3. Example Read and Write Using Setup, Hold and Wait Times ........................... 5–8
5.3.2. Synchronous Transfers ......................................................................................................5–10
5.3.3. Pipelined Slave Read Transfers ........................................................................................5–10
5.4. Master Transfers ................................................................................................................................5–12
6.1. Introduction .........................................................................................................................................6–1
6.1.1. Features ..................................................................................................................................6–2
6.1.2. Terms and Concepts ............................................................................................................6–2
6.2. Avalon-ST Interface Signals ..............................................................................................................6–3
6.2.1. Signal Polarity .......................................................................................................................6–4
6.2.2. Signal Sequencing and Timing ...........................................................................................6–5
6.2.2.1. Synchronous Interface ............................................................................................... 6–5
6.2.2.2. Clock Enables .............................................................................................................. 6–5
6.3. Avalon-ST Interface Properties .........................................................................................................6–5
6.4. Typical Data Transfers .......................................................................................................................6–6
6.4.1. Signal Details ........................................................................................................................6–6
6.4.2. Data Layout ...........................................................................................................................6–7
6.5. Data Transfer without Backpressure ................................................................................................6–8
6.6. Data Transfer with Backpressure .....................................................................................................6–9
6.7. Packet Data Transfers .......................................................................................................................6–10
6.7.1. Signal Details ......................................................................................................................6–11
6.7.2. Protocol Details ...................................................................................................................6–11
7.1. Properties .............................................................................................................................................7–2
7.2. Signals ...................................................................................................................................................7–2
Document Revision History ..................................................................................................................Info–1
How to Contact Altera ...........................................................................................................................Info–1
Typographic Conventions .....................................................................................................................Info–2
