Jameco Electronics 3000 ユーザーズマニュアル
322
Rabbit 3000 Microprocessor
C.3.1 Peripheral Interrupt Prioritization
Most interrupts can be programmed to occur at any of three priority levels, but several are
restricted to Level 3 (the highest priority) only. The interrupts restricted to Level 3 are sys-
tem mode violation, stack limit violation, write protection violation, and the secondary
watchdog. In addition, any interrupt assigned to User mode is prevented (by hardware)
from requesting a Level 3 interrupt. If a user-assigned interrupt is programmed to occur at
Level 3, the hardware will automatically modify the request to occur at Level 2. Within a
given interrupt priority level, the interrupts are prioritized according to Table C-5.
restricted to Level 3 (the highest priority) only. The interrupts restricted to Level 3 are sys-
tem mode violation, stack limit violation, write protection violation, and the secondary
watchdog. In addition, any interrupt assigned to User mode is prevented (by hardware)
from requesting a Level 3 interrupt. If a user-assigned interrupt is programmed to occur at
Level 3, the hardware will automatically modify the request to occur at Level 2. Within a
given interrupt priority level, the interrupts are prioritized according to Table C-5.