UMFT221XE-01 FTDI, UMFT221XE-01 Datasheet - Page 6

• Manufacturer Part Number: UMFT221XE-01
• Description: Interface Development Tools USB to 8-Bit SPI FT1248 Mod.
• Manufacturer: FTDI
• Type: USB to SPIr
• Series: FT221Xr

Specifications of UMFT221XE-01

• Rohs: yes
• Product: Development Modules
• Tool Is For Evaluation Of: FT221XQ
• Interface Type: I2C, SPI, USB
• Operating Supply Voltage: 3.3 V
• Description/function: USB to 8bit SPI 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: FT221XQ

CBUS Signal
4.3
The following options can be configured on the CBUS I/O pins. These options are all configured in the
internal MTP ROM using the utility software FT_PROG, which can be downloaded from the
www.ftdichip.com. The default configuration is described in
BCD_Charger#
Table 4.2 – CBUS Signal Options
**When in USB suspend mode the outputs clocks are also suspended.
Keep_Awake#
BitBang_WR#
BCD_Charger
BitBang_RD#
TX&RXLED#
VBUS Sense
Time Stamp
CLK24MHz
CLK12MHz
CLK6MHz
DRIVE_1
DRIVE_0
PWREN#
Option
TXLED#
RXLED#
SLEEP#
Tristate
GPIO
CBUS Signal Options
Available On CBUS Pin
CBUS3
CBUS3
CBUS3
CBUS3
CBUS3
CBUS3
CBUS3
CBUS3
CBUS3
CBUS3
CBUS3
CBUS3
CBUS3
CBUS3
CBUS3
CBUS3
CBUS3
CBUS3
CBUS3
Copyright © 2012 Future Technology Devices International Limited
IO Pad is tri-stated
Output a constant 1
Output a constant 0
Output is low after the device has been configured by USB, then
high during USB suspend mode. This output can be used to control
power to external logic P-Channel logic level MOSFET switch.
NOTE: This function is driven by an open-drain to ground with no
internal pull-up, this is specially designed to aid battery charging
applications. UMFT221XE connects an on board 47K pull-up on all
CBUS and DBUS lines.
Transmit data LED drive – open drain pulses low when transmitting
data via USB.
Receive data LED drive – open drain pulses low when receiving data
via USB.
LED drive – open drain pulses low when transmitting or receiving
data via USB.
Goes low during USB suspend mode. Typically used to power down
an external logic. De-activate SLEEP# option for when connected to
a dedicated charger port, this can be selected when configuring the
MTP ROM. When this option is enabled SLEEP# is driven high when
FT221X is connected to a Dedicated Charger Port.
24 MHz Clock output.**
12 MHz Clock output.**
6 MHz Clock output.**
CBUS bit bang mode option. Allows up to 4 of the CBUS pins to be
used as general purpose I/O. Configured individually for CBUS0,
CBUS1, CBUS2 and CBUS3 in the internal MTP ROM. A separate
application note, AN232R-01, available from
(www.ftdichip.com) describes in more detail how to use CBUS bit
bang mode.
Battery Charge Detect indicates when the device is connected to a
dedicated battery charger host. Active high output. NOTE: Requires
a 10K pull-down to remove power up toggling.
Active low BCD Charger, driven by an open drain to ground with no
internal pull-up (4.7K on board pull-up present).
Synchronous and asynchronous bit bang mode WR# strobe output.
Synchronous and asynchronous bit bang mode RD# strobe output.
Input to detect when VBUS is present.
Toggle signal which changes state each time a USB SOF is received
Active Low input, prevents the chip from going into suspend.
Document Reference No.: FT_000651
Section
9.
Description
Clearance No.: FTDI#
FTDI website
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UMFT221XE
Version 1.0
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