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GL843 Datasheet(PDF) 78 Page - GENESYS LOGIC |
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GL843 Datasheet(HTML) 78 Page - GENESYS LOGIC |
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78 / 84 page  GL843 High Speed USB2.0 With ADF 2-in-1 Scanner Controller For 3x ©2000-2006 Genesys Logic Inc. - All rights reserved. Page 78 34 Supports ADF Function GL843 supports ADF (Auto-document-feeder) function via internal logic circuitry. Programmers need to set the ADFSEL control bit to logic ‘1’. GPIO6 controls the motor pulse trigger if the motor moving of ADF module is implemented by trigger pulse, otherwise the motor moving is driven by motor phases. GPO28 controls the moving direction of motor if ADF module is necessary. GPIO16 is the cover sensor input, GPIO27 is the ADF sensor input and HOME is document sensor input under ADF mode. GL843 can feed document sheets automatically to scanning window. After sensing the present of document by document sensor, software should issue feed command to GL843 for paper feeding. After document sheet reaches ADF sensor, scanning process will be started after PREFED motor steps. Document Sensor ADF Sensor Document Sheet Scanning Window PREFED |
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