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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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WM8753LEB/V 데이터시트(PDF) 49 Page - Wolfson Microelectronics plc |
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WM8753LEB/V 데이터시트(HTML) 49 Page - Wolfson Microelectronics plc |
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49 / 87 page  WM8753L Advanced Information w AI Rev 3.1 June 2004 49 Write R27/R28 to configure GPIO INT pin Set HPSWIEN in register R26 Set HPSWIPOL in register R25 WM8753 will interrupt when headphones connected INT virtual pin activated user connects headphones or headphones already connected Host enters interrupt mode Read device status [SR4] (optional) Clear HPSWIEN Invert HPSWIPOL Set HPSWIEN INT pin deactivated if no other interrupts HOST WM8753 Will now interrupt when headphones disconnected Read interrupt status [SR5] (when multiple source enabled) SR_IHPDET will be set if interrupt caused by headphones. SR_HPDET will indicate the current status of the headphones. The interupt controller in the WM8753 is level sensitive, ensuring that interupts are always detected even without a clock. This flowchart illustrates headphone detection, but the same principle applies to the other interrupt sources. user disconnects headphones or headphones already disconnected Figure 14 Interrupt Control Flowchart |
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