Fujitsu MB90460 Series Hardware Manual page 139

CHAPTER 7 INTERRUPT
■ Interrupt Control Register Functions
All interrupt control registers (ICR) do the following
• Set the interrupt level of the corresponding peripheral function
• Select ordinary interrupt or the extended intelligent I/O service as interrupt of the corresponding
peripheral function
• Select an extended intelligent I/O service (EI
• Display the status of the extended intelligent I/O service (EI
Some of the functions of the interrupt control registers (ICR) differ during writing and reading, as shown in
Figure 7.3-1 and Figure 7.3-2.
Note:
Do not use a read-modify-write instruction to access the interrupt control registers (ICR), since
operation will not be correct.
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OS) channel
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OS)