Freescale-semiconductor ColdFire MCF52210 Bedienungsanleitung PDF herunterladen (Seite 222)

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101

Interrupt Controller Module

MCF52211 ColdFire® Integrated Microcontroller Reference Manual, Rev. 2

14-12 Freescale Semiconductor

IPSBAR

Offsets: See Table 14-2 for register offsets (ICRnx)

Access: R/W (Read only for ICRn1-ICRn7)

76543210

R 0 0

IL IP

Reset:00000000

Note: It is the responsibility of the software to program the ICRnx registers with unique and non-overlapping level

and priority definitions. Failure to program the ICRnx registers in this manner can result in undefined

behavior. If a specific interrupt request is completely unused, the ICRnx value can remain in its reset (and

disabled) state.

Figure 14-9. Interrupt Control Register (ICRnx)

Table 14-12. ICRnx Field Descriptions

Field Description

7–6 Reserved, should be cleared.

5–3

Interrupt level. Indicates the interrupt level assigned to each interrupt input.

2–0

Interrupt priority. Indicates the interrupt priority for internal modules within the interrupt-level assignment. 000b

represents the lowest priority and 111b represents the highest. For the fixed level interrupt sources, the priority is fixed

at the midpoint for the level, and the IP field always reads as 000b.

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