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64 FUJITSU MICROELECTRONICS LIMITED CM71-00105-1E
CHAPTER 4 RESET AND "EIT" PROCESSING
4.8
4.8.2 Timing of Reflection of Interrupt Level Mask Register
(ILM)
Acceptance to interrupt request is reflected from the instruction which modifies the value of interrupt level
mask register (ILM).
Figure 4.8-3 shows the timing of reflection when the interrupt level mask register (ILM) is modified.
Figure 4.8-3
Timing of reflection when the Interrupt level mask register (ILM) is modified
"set_ILM_B" is a value of the interrupt level mask register (ILM) to be newly assigned. As in the case of
STILM #30, assign a numeric value of 0 to 31.
Instruction
execution
ILM
Interrupt
reception
Instruction A A
STILM #set_ILM_B B B
Instruction B B
Instruction B B
ILM is reflected from here