C167CS-4RM datasheet(92/517 Pages) INFINEON

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C167CS

Derivatives

Interrupt and Trap Functions

User’s Manual

5-9

V2.0, 2000-07

Figure 5-1

Priority Levels and PEC Channels

Table 5-3 shows in a few examples, which action is executed with a given programming

of an interrupt control register.

Note: All requests on levels 13 … 1 cannot initiate PEC transfers. They are always

serviced by an interrupt service routine. No PECC register is associated and no

COUNT field is checked.

Table 5-3

Interrupt Priority Examples

Priority Level

Type of Service

ILVL

GLVL

COUNT = 00H

COUNT

≠ 00

1 1 1 11 1

CPU interrupt,

level 15, group priority 3

PEC service,

channel 7

1 1 1 11 0

CPU interrupt,

level 15, group priority 2

PEC service,

channel 6

1 1 1 01 0

CPU interrupt,

level 14, group priority 2

PEC service,

channel 2

1 1 0 1

1 0

CPU interrupt,

level 13, group priority 2

CPU interrupt,

level 13, group priority 2

0 0 0 1

1 1

CPU interrupt,

level 1, group priority 3

CPU interrupt,

level 1, group priority 3

0 0 0 1

0 0

CPU interrupt,

level 1, group priority 0

CPU interrupt,

level 1, group priority 0

0 0 0 0

X X

No service!

MCA04330

ILVL

GLVL

PEC Channel #

Interrupt

Control Register

PEC Control

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