C511_1 Datasheet, PDF (88/128 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

Interrupt System
7 Interrupt System
The C511/513 provides 7 interrupt sources with two priority levels. Five interrupts can be generated
by the on-chip peripherals (timer 0, timer 1, timer 2, USART and SSC) and three interrupts may be
triggered externally (P1.1/T2EX, P3.2/INT0 and P3.3/INT1).
Short Description of the Interrupt Structure for Advanced C511/1513 Users
The interrupt structure of the C500 architecture has been mainly adapted from the 8052
microcontroller. Thus, each interrupt source has its dedicated interrupt vector and can be enabled/
disabled individually. There are also two priority levels available.
Figure 7-1 gives a general overview of the interrupt sources and illustrates the request and control
flags described in the next sections.
Semiconductor Group
7-1