The Overflow (OVFLO) field in the Data
Output and Status channels is only available when the Scaled arithmetic is used.
OVFLO is driven High during unloading if any point in the data frame
overflowed. For a multichannel core, there is a separate OVFLO field for each
channel.
When an overflow occurs in the core, the
data is wrapped rather than saturated, resulting in the transformed data becoming
unusable for most applications.
Note: For
Fixed-point SSR>1, only conservative scaling schedule is supported, hence
overflows do not occur. Therefore,
OVFLO is not
necessary.