Fujitsu MB90335 Series Hardware Manual page 74

MB90335 Series
■ Interrupt Control Register Functions
Each of the interrupt control register (ICR) has the following four functions.
• Setting of interrupt level for peripheral function
• Selection of whether to perform normal interrupt or external intelligent for corresponding peripheral
function (EI
• Select the channel of Extended Intelligent I/O service (EI
• Display of extended intelligent I/O service (EI
For the interrupt control registers (ICRs), some functions are different between write and read. Details are
shown in Figure 3.1-1 and Figure 3.1-2.
Note:
Do not use any read modify write instruction to access the interrupt control register (ICR). An attempt
of this may cause a malfunction.
CM44-10137-6E
2
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FUJITSU MICROELECTRONICS LIMITED
3.3 Interrupt Control Register and Peripheral Function
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2
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CHAPTER 3 INTERRUPT
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