Fujitsu F2MCTM-16LX - page 100

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CHAPTER 4 DELAYED INTERRUPT GENERATION MODULE
4.1 Overview of Delayed Interrupt Generation Module
The delayed interrupt generation module generates the interrupt for task switching.
The hardware interrupt request can be generated/cancelled by software.
■Overview of Delayed Interrupt Generation Module
By using the delayed interrupt genera tion module, a hardware interrupt request can be generated or
cancelled by software.
Table 4.1-1 shows the overview of the delayed interrupt generation module.
Table 4.1-1 Overview of Delayed Interrupt Generation Module
Function and control
Interrupt factor An interrupt request is generated by setting the R0 bit in the delayed
interrupt request generate/cancel register to 1 (DIRR: R0 = 1).
An interrupt request is cancelled by setting the R0 bit in the delayed
interrupt request generate/cancel register to 0 (DIRR: R0 = 0).
Interrupt number #42 (2AH)
Interrupt control An interrupt is not enabled by the DIRR register.
Interrupt flag The interrupt flag is held in the R0 bit in the DIRR register.
EI2OS The DIRR register does not correspond to the EI2OS.