MPC8544COMEDEV Freescale Semiconductor, MPC8544COMEDEV Datasheet - Page 592

Manufacturer Part Number

MPC8544COMEDEV

KIT DEV EXPRESS MPC8544COM

Manufacturer

Freescale Semiconductor

For Use With/related Products

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Security Engine (SEC) 2.1

The interrupt clear register provides a means of clearing the interrupt status register. When a bit in the ICR

is written with a 1, the corresponding bit in the ISR is cleared, clearing the interrupt output signal IRQ

(assuming the cleared bit in the ISR is the only interrupt source). If the input source to the ISR is a

steady-state signal that remains active, the appropriate ISR bit, and subsequently IRQ, will be re-asserted

shortly thereafter.

When an ICR bit is written, it automatically clears itself one cycle later. That is, it is not necessary to write

a ‘0’ to a bit position which has been written with a ‘1.’

Address 0x3_1018

Interrupt Clear Register (ICR)

MPC8544E PowerQUICC III Integrated Host Processor Family Reference Manual, Rev. 1

Interrupts are registered and sent based upon the conditions that cause them.

If the cause of an interrupt is not removed, the interrupt will return a few

cycles after it has been cleared using the ICR.

Figure 12-82

Figure 12-82. Interrupt Clear Register (ICR)

shows the bit positions of each interrupt source that can be cleared by this

DONE Overflow

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