UMFT231XE-01 FTDI, UMFT231XE-01 Datasheet - Page 8

• Manufacturer Part Number: UMFT231XE-01
• Description: Interface Development Tools USB to UART DIP Dev. Module
• Manufacturer: FTDI
• Type: USB to UARTr
• Series: FT231Xr

Specifications of UMFT231XE-01

• Rohs: yes
• Product: Development Modules
• Tool Is For Evaluation Of: FT231XQ
• Interface Type: I2C, UART, USB
• Operating Supply Voltage: 3.3 V
• Description/function: USB to UART evaluation module
• Dimensions: 29.02 mm x 19.24 mm x 9.2 mm
• Operating Supply Current: 1 A
• Factory Pack Quantity: 25
• For Use With: FT231XQ

5.2
Figure 5.1 – Bus Powered Configuration
A bus powered configuration draws its power from the USB host/hub. The UMFT231XE is configured by
default to be in bus powered mode.
Figure 5.1 illustrates the UMFT231XE module in a typical USB bus powered design configuration. By
default VCCIO is connected to 3V3OUT, and VCC is connected to VBUS.
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 FT231X power input (VCC)
+3.3V power is sourced from the FT231X‟s voltage regulator output and is connected to the FT231X IO
port‟s power input (VCCIO).
Interfacing the UMFT231XE 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 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).
Bus Powered Configuration
Current Flow
Jumper JP1 - Closed
3V3 TTL Mode
Self-Sourced
GND
Alternative
connection
3V3OUT
VCCIO
Copyright © 2012 Future Technology Devices International Limited
Document Reference No.: FT_000652
VBUS
VCC
connection
Alternative
Jumper JP2- Closed
Bus Powered
Mode
GND
Clearance No.: FTDI#
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UMFT231XE
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