UMFT221XA-01 FTDI, UMFT221XA-01 Datasheet - Page 8

• Manufacturer Part Number: UMFT221XA-01
• Description: Interface Development Tools USB to SPI/FT1248 Dev Mod for FT221X
• Manufacturer: FTDI
• Type: USB to SPIr

Specifications of UMFT221XA-01

• Rohs: yes
• Product: Development Modules
• Tool Is For Evaluation Of: FT221XQ
• Interface Type: USB, SPI
• Operating Supply Voltage: 3.3 V
• Dimensions: 34.7 mm x 12.2 mm x 2.2 mm
• Tradename: X-Chip

UMFT221XA
Version 1.1
268
Document Reference No.: FT_000518
Clearance No.: FTDI#
Bus Powered Configuration
5.3
GND
Alternative
Alternative
connection
connection
VCCIO
VCC
Current Flow
3V3OUT
VBUS
GND
Bus Powered
Self-Sourced
Mode
3V3 TTL Mode
Solder Link JP2 - Closed
Solder Link JP1 - Closed
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 UMFT221XA is configured by
default to be in bus powered mode.
Figure 5.1 illustrates the UMFT221XA 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 FT221X power input (VCC)
+3.3V power is sourced from the FT221X‟s voltage regulator output and is connected to the FT221X IO
port‟s power input (VCCIO).
Interfacing the UMFT221XA module to a microcontroller (MCU), or other logic devices for bus powered
configuration is done in exactly the same way as a self-powered configuration (see Section 5.3), 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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