SAK-C505L Infineon Technologies AG, SAK-C505L Datasheet - Page 45

• Manufacturer Part Number: SAK-C505L
• Description: 8-bit CMOS Microcontroller
• Manufacturer: Infineon Technologies AG

Interrupt System
The C505L provides 12 interrupt vectors with four priority levels. Five interrupt requests can be
generated by the on-chip peripherals (timer 0, timer 1, timer 2, serial interface, A/D converter) and
six interrupts may be triggered externally (P3.2/INT0, P3.3/INT1, P1.0/AN0/INT3/CC0, P1.1/AN1/
INT4/CC1, P1.2/AN2/INT5/CC2, P1.3/AN3/INT6/CC3). Additionally, the P1.5/AN5/T2EX can
trigger an interrupt. There is one software-generated interrupt (bit SWI in SFR IEN1) in addition to
the above interrupts. The wake-up from power-down mode interrupt has a special functionality
which allows an exit from the software power-down mode by a short low pulse at either pin P3.2/
INT0 or by the real-time clock interrupt.
Figure 21 to Figure 23 give a general overview of the interrupt sources and illustrate the
corresponding request and the control flags. Table 9 lists all interrupt sources with the
corresponding request flags and interrupt vector addresses.
Table 9
Interrupt Source and Vectors
Interrupt Source
External Interrupt 0
Timer 0 Overflow
External Interrupt 1
Timer 1 Overflow
Serial Channel
Timer 2 Overflow / Ext. Reload
A/D Converter
Software Interrupt
External interrupt 3
External Interrupt 4
External Interrupt 5
External interrupt 6
Wake-up from power-down mode
Data Sheet
Interrupt Vector Address
0003
000B
0013
001B
0023
002B
0043
004B
0053
005B
0063
006B
007B
H
H
H
H
H
H
H
H
H
H
H
H
H
43
Interrupt Request Flags
IE0
TF0
IE1
TF1
RI / TI
TF2 / EXF2
IADC
SWI
IEX3
IEX4
IEX5
IEX6
IRTC
(real-time clock wake-up only)
C505L
06.99