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FT232RN Datasheet(PDF) 28 Page - Future Technology Devices International Ltd. |
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FT232RN Datasheet(HTML) 28 Page - Future Technology Devices International Ltd. |
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28 / 40 page  Copyright © Future Technology Devices International Limited 28 FT232RN USB UART IC Datasheet Version 1.0 Document No.: FT_001521 Clearance No.: FTDI#571 7.5 LED Interface Any of the CBUS I/O pins can be configured to drive an LED. The FT232RN has 3 configuration options for driving LEDs from CBUS. These are TXLED#, RXLED#, and TX&RXLED#. Refer to Section 3.5 for configuration options. Figure 7.5 Dual LED Configuration An example of using the FT232RN to drive LEDs is shown in Figure 7.5. In this application one of the CBUS pins is used to indicate transmission of data (TXLED#) and another is used to indicate receiving data (RXLED#). When data is being transmitted or received the respective pins will drive from tristate to low in order to provide indication on the LEDs of data transfer. A digital one-shot is used so that even a small percentage of data transfer is visible to the end user. Figure 7.6 Single LED Configuration |
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