SWRZ075D May 2017 – December 2020 AWR1443
DMA Read from Unimplemented Address Space may Result in DMA Hang Scenario
AWR1443 ES1.0, AWR1443 ES2.0, and AWR1443 ES3.0
The MSS DMA generates a BER (Bus Error) interrupt when the DMA detects a bus error due to a read from unimplemented address space. This interrupt is available on VIM Interrupt Channel-70. This read from unimplemented address space results in a hang condition in the DMA infrastructure bridge that connects it to the main interconnect.
Implication: A DMA read from an unimplemented address can result in a DMA hang condition. In the resulting state the DMA will not respond to any further DMA requests.
The anomalous nERROR toggle would need to be ignored by the external monitoring circuit (if deployed).