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SH7052 Datasheet(PDF) 117 Page - Renesas Technology Corp |
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SH7052 Datasheet(HTML) 117 Page - Renesas Technology Corp |
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117 / 919 page  91 • Bits 7 to 4—IRQ0 to IRQ3 Flags (IRQ0F to IRQ3F): These bits display the IRQ0 to IRQ3 interrupt request status. Bits 7 to 4: IRQ0F to IRQ3F Detection Setting Description 0 Level detection No IRQn interrupt request exists [Clearing condition] When IRQn input is high Edge detection No IRQn interrupt request was detected (Initial value) [Clearing conditions] • When 0 is written after reading IRQnF = 1 • When IRQn interrupt exception processing has been executed 1 Level detection An IRQn interrupt request exists [Setting condition] When IRQn input is low Edge detection An IRQn interrupt request was detected [Setting condition] When a falling edge occurs at an IRQn input • Bits 3 to 0—Reserved: These bits always read 0. The write value should always be 0. |
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