FT231XQ-T FTDI, FT231XQ-T Datasheet - Page 11

• Manufacturer Part Number: FT231XQ-T
• Description: USB Interface IC USB to Full Serial UART IC QFN-20
• Manufacturer: FTDI

Specifications of FT231XQ-T

• Rohs: yes
• Tradename: X-Chip

BitBang_WR#
BitBang_RD#
BCD Charger
TX&RXLED#
VBUS Sense
TRI-STATE
CLK24MHz
CLK12MHz
Charger#
CLK6MHz
PWREN#
The following options can be configured on the CBUS I/O pins. CBUS signal options are common to both
package versions of the FT231X. These options can be configured in the internal MTP memory using the
software utility FT_PPROG, which can be downloaded from the FTDI Utilities (www.ftdichip.com). The
default configuration is described in Section 8.
Option
DRIVE 1
DRIVE 0
TXLED#
RXLED#
Signal
SLEEP#
CBUS
TXDEN
GPIO
BCD
CBUS0, CBUS1, CBUS2, CBUS3
CBUS0, CBUS1, CBUS2, CBUS3
CBUS0, CBUS1, CBUS2, CBUS3
CBUS0, CBUS1, CBUS2, CBUS3
CBUS0, CBUS1, CBUS2, CBUS3
CBUS0, CBUS1, CBUS2, CBUS3
CBUS0, CBUS1, CBUS2, CBUS3
CBUS0, CBUS1, CBUS2, CBUS3
CBUS0, CBUS1, CBUS2, CBUS3
CBUS0, CBUS1, CBUS2, CBUS3
CBUS0, CBUS1, CBUS2, CBUS3
CBUS0, CBUS1, CBUS2, CBUS3
CBUS0, CBUS1, CBUS2, CBUS3
CBUS0, CBUS1, CBUS2, CBUS3
CBUS0, CBUS1, CBUS2, CBUS3
CBUS0, CBUS1, CBUS2, CBUS3
CBUS0, CBUS1, CBUS2, CBUS3
CBUS0, CBUS1, CBUS2, CBUS3
Copyright © 2013 Future Technology Devices International Limited
Available On CBUS Pin
FT231X USB TO FULL HANDSHAKE UART IC
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. Enable the interface pull-down
option when using the PWREN# in this way.
Transmit data LED drive – pulses low when transmitting
data via USB. See Section 7.5 for more details.
Receive data LED drive – pulses low when receiving data
via USB. See Section 7.5 for more details.
LED drive – pulses low when transmitting or receiving data
via USB. See Section 7.5 for more details.
Goes low during USB suspend mode. Typically used to
power down an external TTL to RS232 level converter IC
in USB to RS232 converter designs.
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
AN232R-01, available from FTDI website
(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. Active high
output.
Inverse of BCD Charger
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.
Document No.: FT_000565 Clearance No.:
memory
Description
. A separate application note,
Datasheet
Version 1.2
FTDI# 261
11