Document No.: FT_000053
FT232R USB UART IC Datasheet Version 2.07
Clearance No.: FTDI# 38
Pin
No.
Name
Type
Description
Configurable CBUS I/O Pin. Function of this pin is configured in the device internal
EEPROM. Factory default configuration is PWREN#. See CBUS Signal Options, Table
Configurable CBUS I/O Pin. Function of this pin is configured in the device internal
EEPROM. Factory default configuration is RXLED#. See CBUS Signal Options, Table 3.9.
Configurable CBUS I/O Pin. Function of this pin is configured in the device internal
EEPROM. Factory default configuration is TXLED#. See CBUS Signal Options, Table 3.9.
11
CBUS3
I/O
21
CBUS1
I/O
22
CBUS0
I/O
Table 3.8 UART Interface and CBUS Group (see note 3)
Notes:
1. The minimum operating voltage VCC must be +4.0V (could use VBUS=+5V) when using the
internal clock generator. Operation at +3.3V is possible using an external crystal oscillator.
2. For details on how to use an external crystal, ceramic resonator, or oscillator with the FT232R,
please refer to Section 7.6.
3. When used in Input Mode, the input pins are pulled to VCCIO via internal 200kΩ resistors. These
pins can be programmed to gently pull low during USB suspend (PWREN# = “1”) by setting an
option in the internal EEPROM.
Copyright © 2010 Future Technology Devices International Limited
12
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