C167CS datasheet(100/517 Pages) INFINEON

Part #	C167CS

Description	16-Bit Single-Chip Microcontroller

PDF	517 Pages

Scroll/Zoom	100%

Manufacturer	INFINEON [Infineon Technologies AG]

Direct Link	http://www.infineon.com

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C167CS

Derivatives

Interrupt and Trap Functions

User’s Manual

5-17

V2.0, 2000-07

The example below establishes 3 interrupt classes which cover 2 or 3 interrupt priorities,

depending on the number of members in a class. A level 6 interrupt disables all other

sources in class 2 by changing the current CPU level to 8, which is the highest priority

(ILVL) in class 2. Class 1 requests or PEC requests are still serviced in this case.

The 24 interrupt sources (excluding PEC requests) are so assigned to 3 classes of

priority rather than to 7 different levels, as the hardware support would do.

Table 5-6

Software Controlled Interrupt Classes (Example)

ILVL

(Priority)

GLVL

Interpretation

3210

PEC service on up to 8 channels

XXXXInterrupt Class 1

5 sources on 2 levels

XXXXInterrupt Class 2

9 sources on 3 levels

XXXX

XXXXInterrupt Class 3

5 sources on 2 levels

No service!

C167CS Datasheet(PDF) 100 Page - Infineon Technologies AG