C515C_9711 Datasheet, PDF (188/268 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

Interrupt System
C515C
7 Interrupt System
The C515C provides 17 interrupt sources with four priority levels. Seven interrupts can be
generated by the on-chip peripherals (timer 0, timer 1, timer 2, serial interface, A/D converter, SSC
interface, CAN controller), and ten interrupts may be triggered externally (P1.5/T2EX, P3.2/INT0,
P3.3/INT1, P1.4/INT2, P1.0/INT3, P1.1/INT4, P1.2/INT5, P1.3/INT6, P7.0/INT7, P4.5/INT8). The
wake-up from power-down mode interrupt has a special functionality which allows to exit from the
software power-down mode by a short low pulse at pin P3.2/INT0.
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
1997-11-01