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UMFT240XA-01 Datasheet(PDF) 9 Page - Future Technology Devices International Ltd. |
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UMFT240XA-01 Datasheet(HTML) 9 Page - Future Technology Devices International Ltd. |
9 / 21 page Copyright © Future Technology Devices International Limited 9 UMFT230XA Datasheet Version 1.4 Doc ument Reference N o.: FT _000519 C learance N o.: FT DI# 2 6 9 5.3 Bus Power Configuration GND Solder Link JP1 - Closed GND Solder Link JP2 - Closed Alternative connection Alternative connection Current Flow Bus Powered Mode Self-Sourced 3V3 TTL Mode VCCIO 3V3OUT VBUS VCC Viewing pins thourgh the board from the top. Figure 5.1 – Bus Powered Configuration A bus powered configuration draws its power from the USB host/hub. The UMFT230XA is configured by default to be in bus powered mode. Figure 5.1illustrates the UMFT230XA module in a typical USB bus powered design configuration. By default solder bridge connections link VCCIO to 3V3OUT, and VCC to VBUS. (Note that Figure 5.1 is for illustration only and that the pins do not actually go all the way through the PCB For a bus power configuration power is supplied from the USB VBUS: +5V VBUS power is sourced from the USB bus and is connected to the FT230X power input (VCC) +3.3V power is sourced from the FT230X’s voltage regulator output and is connected to the FT230X IO port’s power input (VCCIO). Interfacing the UMFT230XA module to a microcontroller (MCU), or other logic devices for bus powered configuration is done the same way as a self powered configuration (see Section 3), except that it is possible for the MCU or external device to take its power supply from the USB bus (either the 5V from the USB pin, or 3.3V from the 3V3OUT pin). |
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