8.2.1. Parity

For each byte, a parity bit is computed and stored with that byte. This requires eight bits of parity, or redundant data per doubleword. With a parity scheme, a single error in a byte or its parity bit can be detected, but not corrected. This means that, provided they are all in different bytes, eight errors can be detected per doubleword. However, if there are two errors in any individual byte, this cannot be detected. Odd or even parity can be used, and this can be pin-configured during integration.

Copyright © 2010-2011 ARM. All rights reserved.ARM DDI 0460C
Non-ConfidentialID021511