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Semiconductor Group 6 - 4

6.2 Interrupt Structure

This section summarizes the expanded interrupt structure of the SAB 80C517A which has 3 new

interrupt vectors in addition to the 14 vectors of the SAB 80C517. Thus, 17 vectors are available

now.

The new interrupt sources are:

1. Request Flags

ICMP0 to ICMP7: These eight request flags are set by compare matches in the compare

registers CM0-7, if the compare function is enabled and compare mode 1 is

selected for the corresponding register SCM0-7.

Interrupt vector: 0093H

Enable Bit: ECMP (IEN2.2)

Priority: Same priority as IE1/IEX3, programmed by IP1.2/IP0.2

2. Request Flag:

ICS This request flag is set by a compare match in compare register COMSET.

Interrupt Vector: 00A3H

Enable Bit: ECS (IEN2.4)

Priority: Same priority as RI0+TI0/IEX5, programmed by IP1.4/IP0.4

3. Request Flag:

ICR This request flag is set by a compare match in compare register COMCLR

Interrupt Vector: 00ABH

Enable Bit: ECR (IEN2.5)

Priority: Same priority as TF2+EXF2/IEX6, programmed by IP1.5/IP0.5

Interrupt System

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Siemens EF 88H Series Manual de usuario Pagina 60