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MC81F4204 Datasheet(PDF) 82 Page - Finechips |
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MC81F4204 Datasheet(HTML) 82 Page - Finechips |
82 / 150 page ![]() MC81F4204 82 October 19, 2009 Ver.1.35 12. EXTERNAL INTERRUPTS The external interrupt pins are edge triggered depending on the „external interrupt registers‟. The edge detection of external interrupt has three transition activated mode: rising edge, falling edge, and both edge. 12.1 Registers EINT0H – EXT 2~5 / R04~R07 R0 PORT EXTERNAL INTERRUPT ENABLE HIGH REGISTER 00CAH A reset clears the EINT0H register to „00H‟, disables EXT5-EXT2 interrupt. You can use EINT0H register setting to select Disable interrupt or Enable interrupt (by falling, rising, or both falling and rising edge). 7 6 5 4 3 2 1 0 EINT0H EXT5IE EXT4IE EXT3IE EXT2IE Reset value: 00H R/W R/W R/W R/W R/W R/W R/W R/W EXT5IE R07/EXT5 External Interrupt Enable Bits 00: Disable Interrupt 01: Enable Interrupt by falling edge 10: Enable Interrupt by rising edge 11: Enable Interrupt by both falling and rising edge EXT4IE R06/EXT4 External Interrupt Enable Bits EXT3IE R05/EXT3 External Interrupt Enable Bits EXT2IE R04/EXT2 External Interrupt Enable Bits |
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