Inbound PIF Request Buffer Depth

Inbound PIF request buffer depth
4

Inbound PIF allows an external PIF master to read/write to Xtensa's internal memories. When the inbound-PIF request option is enabled, an inbound-PIF request buffer is added to the processor. The depth of the inbound-PIF request buffer limits the maximum block-read or -write request that the Xtensa processor can handle. Therefore, the inbound-PIF request buffer size should be configured to be greater than, or equal to the largest possible inbound-PIF block-request size. Note that this control is enabled when the inbound-PIF option is selected for one or more local memories.