SPAKMC331MFC20 View Datasheet(PDF) - Motorola => Freescale

Part Name

Description

Manufacturer

SPAKMC331MFC20

highly-integrated 32-bit microcontroller, 16MHz

Motorola => Freescale 

MODULE CONFIGURATION

AND TEST

RESET STATUS

HALT MONITOR

RESET REQUEST

BUS MONITOR

SPURIOUS INTERRUPT MONITOR

BERR

4

CLOCK

29

PRESCALER

SOFTWARE WATCHDOG TIMER

RESET REQUEST

PERIODIC INTERRUPT TIMER

IRQ [7:1]

SYS PROTECT BLOCK

Figure 4-2 System Configuration and Protection

4.2.1 Module Mapping

Control registers for all the modules in the microcontroller are mapped into a 4-Kbyte

block. The state of the module mapping bit (MM) in the SIM module configuration reg-

ister (SIMCR) determines where the control register block is located in the system

memory map. When MM = 0, register addresses range from $7FF000 to $7FFFFF;

when MM = 1, register addresses range from $FFF000 to $FFFFFF.

4.2.2 Interrupt Arbitration

Each module that can generate interrupt requests has an interrupt arbitration (IARB)

field. Arbitration between interrupt requests of the same priority is performed by serial

contention between IARB field bit values. Contention must take place whenever an in-

terrupt request is acknowledged, even when there is only a single request pending.

For an interrupt to be serviced, the appropriate IARB field must have a non-zero value.

If an interrupt request from a module with an IARB field value of %0000 is recognized,

the CPU32 processes a spurious interrupt exception.

MC68331

USER’S MANUAL

SYSTEM INTEGRATION MODULE

MOTOROLA

4-3

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