Siemens EF 88H Series Manual de usuario descargar pdf (Pagina 104)

Device Specification

Semiconductor Group 7-42

Interrupt Structure

The SAB 80C517A has 17 interrupt vectors with the following vector addresses and request

flags.

Each interrupt vector can be individually enabled/disabled. The response time to an interrupt

request is more than 3 machine cycles and less than 9 machine cycles.

External interrupts 0 and 1 can be activated by a low-level or a negative transition (selectable)

at their corresponding input pin, external interrupts 2 and 3 can be programmed for triggering

on a negative or a positive transition. The external interrupts 2 to 6 are combined with the

corresponding alternate functions compare (output) and capture (input) on port 1.

For programming of the priority levels the interrupt vectors are combined to pairs or triples.

Each pair or triple can be programmed individually to one of four priority levels by setting or

clearing one bit in special function register IP0 and one in IP1. Figure 9 shows the interrupt

request sources, the enabling and the priority level structure.

Table 5

Interrupt Sources and Vectors

Interrupt Request Flags Interrupt Vector Address Interrupt Source

IE0

TF0

IE1

TF1

RI0 + TI0

TF2 + EXF2

IADC

IEX2

IEX3

IEX4

IEX5

IEX6

RI1/TI1

ICMP0 to ICMP7

CTF

ICS

ICR

0003

000B

0013

001B

0023

002B

0043

004B

0053

005B

0063

006B

0083

0093

009B

00A3

00AB

External interrupt 0

Timer 0 overflow

External interrupt 1

Timer 1 overflow

Serial channel 0

Timer 2 overflow/ext. reload

A/D converter

External interrupt 2

External interrupt 3

External interrupt 4

External interrupt 5

External interrupt 6

Serial channel 1

Compare match interrupt of

Compare Registers CM0-

CM7 assigned to Timer 2

Compare timer overflow

Compare match interrupt of

Compare Register COMSET

Compare match interrupt of

Compare Register COMCLR

1 2 ... 99 100 101 102 103 104 105 106 107 108 109 ... 136 137

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