UMFT221XA-01 FTDI, UMFT221XA-01 Datasheet - Page 12

• 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

5.7
Figure 5.5 – USB Self Powered 3.3V Logic Drive
The FT221X can be powered from a single 3.3V supply. This feature is an alternative to having the
FT221X powered at 5V in standard self-powered configuration.
The 3.3V Self Powered configuration is illustrated in Figure 5.5. Note that the 3.3V net is connected to
VCC, VCCIO and 3V3OUT.
(Note that Figure 5.5 is for illustration only and that the pins do not actually go all the way through the
PCB)
5.8
The FT221X contains an embedded MTP ROM. This can be used to configure the functions of each CBUS
pin, the current drive on each signal pin, current limit for the USB bus and the other descriptors of the
device. For details on using the MTP ROM/EEPROM programming utility FT_PROG, please see the
FT_PROG User Guide. and the FT221X datasheet.
When programming the MTP ROM please note:
ii) The Max Bus Power setting of the MTP ROM should specify the maximum current to be drawn from
i) One of the CBUS Pins can be configured as PWREN# in the internal MTP ROM. This can be used to
switch the power supply to the external circuitry.
the USB host/hub when enumerated. For high-powered USB devices the current limit when
enumerated is between 100mA and 500mA, for low-powered USB devices the current limit is
100mA.
3.3V Voltage Supply
Configuring the MTP ROM
Vcc = 3.3V
MCU
IO0
SCLK
MISO
SS#
Solder Links JP1 - Closed
Copyright © 2012 Future Technology Devices International Limited
GND
Optional
Optional
Optional
Optional
Optional
Optional
IO0
Document Reference No.: FT_000518
IO1
IO4
IO5
IO2
IO6
IO3
Viewing pins thourgh the board
3V3OUT
VCCIO
Vcc = 3.3V
from the top.
Optional
IO7
VBUS
VCC
Solder Links JP2 - Open
Clearance No.: FTDI#
12
UMFT221XA
GND
Version 1.1
SCLK
MISO
SS#
268