internal interrupt

internal interrupt

[in′tərn·əl ′int·ə‚rəpt]
(computer science)
A signal for attention sent to a computer's central processing unit by another component of the computer.

internal interrupt

An interrupt that is caused by processing, for example, a request for input or output or an arithmetic overflow error. Contrast with external interrupt.
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System support devices include three watchdog timers: one in the processor to provide an internal interrupt at the first timer expiration, then a hardware reset at the second; a second, external timer that resets the entire board at the first expiration; and a third that resides in the NVRAM with a free running counter programmed by the user.
In addition, the new MCU features a DTC (data transfer controller) that can be activated by internal interrupt or by software, a watch dog timer and a 10 bit, 16 channel A/D converter.
Therefore, a special register is provided which switches the internal interrupt vectors to the highest sector of the lower bank, thus allowing Interrupt Services during write/erase procedures.
On-chip features will include: 64 Kbytes of flash memory (contains SCP software); 24 Kbytes of RAM; five 16-bit timers; a 15-bit watchdog timer; three external and 20 internal interrupts with seven levels; three-channels of serial I/O (UART); and a voltage down converter which will reduce the internal operating voltage to 2.

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