Channel Types

This standard defines two types of communication channels that are used across the system:

Stream Channel

A unidirectional, asynchronous channel of continuous, N-bit word data along with a signal indicating if it is ready to send/receive data. Two directions are defined:

Read:

Streams that transmit data from a device to the host computer.

Write:

Streams that transmit data to a device from the host computer.

Register Channel

A synchronous, bidirectional, N-bit, addressed digital bus. Each address is a 32-bit value. Registers can be Read-only, Write-only or Read-Write. This channel also has signals to indicate a successful or failed completion of a register access operation. (e.g., An access to an non-existent address or a non-allowed operation will return an error.)