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Chapter 25 External Interrupt
1.Overview
Chapter 25 External Interrupt
1. Overview
External interrupt detects a signal input to an external interrupt input pin, and generates an interrupt request.
2. Features
• Quantity : 16 (INT input -- 16 channels: INT0-INT15)
• Interrupt levels: 4 levels
• “L” level
• “H” level
• Rising edge
• Falling edge
Edge
detection
circuit
Pins Interrupt requests