C515C_9711 Datasheet, PDF (206/268 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

Interrupt System
C515C
a) Level-Activated Interrupt
P3.x/INTx
Low-Level Threshold
b) Transition-Activated Interrupt
e.g. P3.x/INTx
> 1 Machine Cycle
High-Level Threshold
> 1 Machine Cycle
> 1 Machine Cycle
Transition to
be detected
Low-Level Threshold
MCD01860
Figure 7-5
External Interrupt Detection
Semiconductor Group
7-19
1997-11-01