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Each interrupt control register (ICR) has the following four functions.
Some functions of the interrupt control register (ICR) are different at write and read.
• Setting of interrupt level of corresponding peripheral
• Selection of whether to perform normal interrupt or EI
• Selection of channel of EI
• Display of end state of EI
Note:
Do not access the interrupt control register (ICR) using the read modify write instruction
because it causes a malfunction.
2
OS
2
OS
2
OS for corresponding peripheral
CHAPTER 3 CPU
63
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