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UM018809-0611 Interrupts

ZNEO

CPU Core

User Manual

Example. Figure 11 displays an example of addresses used during an interrupt operation.

In this example, the interrupt vector quad address is

0000_0014H. The 32-bit interrupt

vector address contained by that quad (

0023_4567H) is loaded into the Program Counter.

The execution of the interrupt service routine begins at

0023_4567H.

Figure 10. Effects of an Interrupt on the Stack

Top of StackStack Pointer

FLAGS[7:0]

PC[15:8]

PC[7:0]

Stack Pointer

Stack Pointer and Stack

Before an Interrupt

Stack Pointer and Stack

After an Interrupt

PC[23:16]

PC[31:24]

00H

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