FT232RL datasheet(10/40 Pages) FTDI

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FT232R USB UART IC Datasheet

Version 2.16

Document No.: FT_000053 Clearance No.: FTDI# 38

Pin No.

Name

Type

Description

to ground using a 100nF capacitor. The purpose of this output is to provide

the internal +3.3V supply to the USB transceiver cell and the internal

1.5kΩ pull up resistor on USBDP. Up to 50mA can be drawn from this pin

to power external logic if required. This pin can also be used to supply the

VCCIO pin.

VCC

PWR

+3.3V to +5.25V supply to the device core. (See Note 1).

AGND

PWR

Device analogue ground supply for internal clock multiplier.

Table 3.6 Power and Ground Group

Pin No.

Name

Type

Description

5, 12,

13, 23,

25, 29

No internal connection. Do not connect.

RESET#

Input

Active low reset. Can be used by an external device to reset the FT232R. If

not required can be left unconnected, or pulled up to VCC.

TEST

Input

Puts the device into IC test mode. Must be tied to GND for normal

operation, otherwise the device will appear to fail.

OSCI

Input

Input 12MHz Oscillator Cell. Optional – Can be left unconnected for normal

operation. (See Note 2).

OSCO

Output

Output from 12MHZ Oscillator Cell. Optional – Can be left unconnected for

normal operation if internal Oscillator is used. (See Note 2).

Table 3.7 Miscellaneous Signal Group

Pin No.

Name

Type

Description

TXD

Output

Transmit Asynchronous Data Output.

DTR#

Output

Data Terminal Ready Control Output / Handshake Signal.

RTS#

Output

Request to Send Control Output / Handshake Signal.

RXD

Input

Receiving Asynchronous Data Input.

RI#

Input

Ring Indicator Control Input. When remote wake up is enabled in the internal

EEPROM taking RI# low (20ms active low pulse) can be used to resume the

PC USB host controller from suspend.

DSR#

Input

Data Set Ready Control Input / Handshake Signal.

DCD#

Input

Data Carrier Detect Control Input.

CTS#

Input

Clear To Send Control Input / Handshake Signal.

CBUS4

I/O

Configurable CBUS output only Pin. Function of this pin is configured in the

device internal EEPROM. Factory default configuration is SLEEP#. See CBUS

Signal Options, Table 3.9.

CBUS2

I/O

Configurable CBUS I/O Pin. Function of this pin is configured in the device

internal EEPROM. Factory default configuration is TXDEN. See CBUS Signal

Options, Table 3.9.

CBUS3

I/O

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 3.9. PWREN# should be used with a 10kΩ resistor pull up.

CBUS1

I/O

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.

CBUS0

I/O

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.

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.

FT232RL Datasheet(PDF) 10 Page - Future Technology Devices International Ltd.

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