47.6.3.5 Interrupt Interface Block
The Interrupt Interface (INTIF) block performs a low-priority polling algorithm of each of the HBI channel descriptors.
The INTIF alerts the HBI block when specific changes to HBI Channel Descriptors occur.
- For asynchronous and control read/write channels:
- A packet is available to read in the channel buffer, or
- Sufficient empty space is available in the channel buffer to accept a requested packet write
- For isochronous read/write channels:
- The number of valid bytes in the channel buffer exceeds the block size, or
- The number of empty bytes in the channel buffer exceeds the block size