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DM412 Datasheet(PDF) 10 Page - Silicon Touch Technology Inc. |
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DM412 Datasheet(HTML) 10 Page - Silicon Touch Technology Inc. |
10 / 35 page 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC . 3-CHANNEL CONSTANT CURRENT LED DRIVERS Version:A.003 Page 9 未經授權而逕予重製、複製、使用或公開本文件,行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM412 Input Data Format LED Open Detection DM412 provides a real time monitor of LED open detection function without extra components or circuit design. It will be identified as a LED open failure when the output is turned on but the output voltage is below 0.3V. The test result of each channel will write to its correspondent shift register which is in LSB position (R[0], G[0], B[0]) while strobe signal is active. User can refer to timing diagram on page12. Detecting report could be retrieved from serial-out (DAO) data. If the system reads ‘1’ back, that indicates LED is in normal status. But if ‘0’ was retrieved then LED open failure has occurred. In order to make sure LED open detection function is in well operating condition, it is recommended that all the luminance data are wrote to ‘1’ then almost turning on the outputs during detection process. Serial-out Data Format |
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