Renesas H8S/2138 Series Manuel Page 35

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Microcomputer Technical Q&A
27
Q&A No.: QAH8S-023
Category: Interrupts
Subject: Handling of Interrupt Requests when Interrupts are Masked
Question
Is an IRQnF interrupt request held pending if generated when interrupts are masked by the I and
UI bits, or bits I2 to I0, in the condition code register (CCR)?
Answer
Yes. IRQnF is independent of the status of the I and UI bits. If interrupt masking is released while
the IRQnF and IRQnE bits are set to 1, the interrupt will be accepted.
Applicable Products
Applicability Series Applicability Series Applicability Series
Yes Entire H8S Series H8S/2655 H8S/2350
H8S/2355 H8S/2357 H8S/2345
H8S/2245 H8S/2148 H8S/2144
H8S/2138 H8S/2134 H8S/2128
H8S/2124
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