Do DTC execute if interrupted in lower on process of higher interrupt?
Latest Updated:03/23/2009
Question:
When H8S/2345 has a DTC request from a lower priority interrupt during the processing of higher priority interrupt, does DTC execute immediately, or does the DTC start after the higher priority interrupt?
Answer:
The DTC starts immediately as it is one of the bus masters, the CPU is also a bus master. Both have precedence for bus access and DTC takes precedence over CPU. Bus master access has priority over interrupts.
Suitable Products
| H8S/2345 |