Datasheet

Chapter 6. SIM Overview 6-13
Programming Model
• Park on master core priority (PARK = 01)—The core retains bus mastership as long
as it needs it. After it negates its internal bus request, the core does not have to
rearbitrate for the bus unless the DMA module has requested the bus when it is idle.
The DMA module can be granted bus mastership only when the core is not asserting
its bus request. See Figure 6-11.
Figure 6-11. Park on Master Core Priority (PARK = 01)
• Park on master DMA priority (PARK = 10)—The DMA module retains bus
mastership as long as it needs it. After it negates its internal bus request, the DMA
module does not have to rearbitrate for the bus unless the core has requested the bus
when it is idle. The core can be granted bus mastership only when the DMA module
is not asserting its bus request. See Figure 6-12.
Figure 6-12. Park on DMA Module Priority (PARK = 10)
Core
DMA Module
Core BR
asserted
Core BR negated
DMA module BR negated
DMA module BR negated/asserted
Core BR
negated
DMA module BR asserted
Core DMA Module
Core BR asserted
DMA BR negated
Core BR negated
DMA module BR negated
DMA module BR
asserted
Core BR negated/asserted