UMFT231XE-01 FTDI, UMFT231XE-01 Datasheet - Page 6

• 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

CBUS Signal
BCD_Charger#
Keep_Awake#
BitBang_WR#
BCD_Charger
BitBang_RD#
VBUS_Sense
Time_Stamp
TX&RXLED#
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
Table 4.2 – CBUS Signal Options
**When in USB suspend mode the outputs clocks are also suspended.
CLK24MHz
CLK12MHz
CLK6MHz
DRIVE_1
DRIVE_0
PWREN#
Option
RXLED#
TXLED#
SLEEP#
Tristate
TXDEN
GPIO
CBUS Signal Options
Available On
CBUS0-CBUS3
CBUS0-CBUS3
CBUS0-CBUS3
CBUS0-CBUS3
CBUS0-CBUS3
CBUS0-CBUS3
CBUS0-CBUS3
CBUS0-CBUS3
CBUS0-CBUS3
CBUS0-CBUS3
CBUS0-CBUS3
CBUS0-CBUS3
CBUS0-CBUS3
CBUS0-CBUS3
CBUS0-CBUS3
CBUS0-CBUS3
CBUS0-CBUS3
CBUS0-CBUS3
CBUS0-CBUS3
CBUS0-CBUS3
CBUS Pin
IO Pad is tri-stated
Output a constant 1
Output a constant 0
Enable transmit data for RS485
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. UMFT231XE
connects all CBUS and DBUS signals an on-board 47K pull-up.
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 to RS232 level converter IC in USB to RS232 converter designs. Cancel
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 FT231X 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
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.
Copyright © 2012 Future Technology Devices International Limited
FTDI website
Document Reference No.: FT_000652
Section
(www.ftdichip.com) describes in more detail how to
Description
9.
Clearance No.: FTDI#
6
UMFT231XE
Version 1.0
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