C517A_99 Datasheet, PDF (171/218 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

Interrupt System
C517A
7 Interrupt System
The C517A provides 17 interrupt sources with four priority levels. Ten interrupts can be generated
by the on-chip peripherals (timer 0, timer 1, timer 2, compare timer, compare match/set/clear, A/D
converter, and serial interface 0 and 1) and seven interrupts may be triggered externally (P3.2/INT0,
P3.3/INT1, P1.4/INT2, P1.0/INT3, P1.1/INT4, P1.2/INT5, P1.3/INT6).
This chapter shows the interrupt structure, the interrupt vectors and the interrupt related special
function registers. Figure 7-1 to 7-3 give a general overview of the interrupt sources and illustrate
the request and the control flags which are described in the next sections.
Semiconductor Group
7-1