FT231XS-R datasheet(8/44 Pages) FTDI

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FT231X USB TO FULL HANDSHAKE UART IC

Datasheet

Version 1.2

Document No.: FT_000565 Clearance No.:

FTDI# 261

Pin No.

Name

Type

Description

USBDM

INPUT

USB Data Signal Minus.

USBDP

INPUT

USB Data Signal Plus.

RESET#

INPUT

Reset input (active low).

Table 3.2 Common Function pins

Pin No.

Name

Type

Description

TXD

Output

Transmit Asynchronous Data Output.

RXD

Input

Receiving Asynchronous Data Input.

RTS#

Output

Request to Send Control Output / Handshake Signal.

CTS#

Input

Clear To Send Control Input / Handshake Signal.

DTR#

Output

Data Terminal Ready Control Output / Handshake Signal.

DSR#

Input

Data Set Ready Control Input / Handshake Signal.

DCD#

Input

Data Carrier Detect Control Input.

RI#

Input

Ring Indicator input for remote wake up.

CBUS0

I/O

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

device MTP memory. The default configuration is TXDEN. See CBUS

Signal Options, Table 3.7.

CBUS1

I/O

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

device MTP memory. The default configuration is RXLED#. See CBUS

Signal Options, Table 3.7.

CBUS2

I/O

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

device MTP memory. The default configuration is TXLED#. See CBUS

Signal Options, Table 3.7.

CBUS3

I/O

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

device MTP memory. The default configuration is SLEEP#. See CBUS

Signal Options, Table 3.7.

Table 3.3 UART Interface and CBUS Group (see note 1)

Notes:

When used in Input Mode, the input pins are pulled to VCCIO via internal 75kΩ

(approx) resistors. These pins can be programmed to gently pull low during USB

suspend (PWREN# = “1”) by setting an option in the MTP memory.

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