Copyright © Future Technology Devices International Limited

6

LC231X Module Datasheet

Version 1.1

Document Reference No.: FT_001388

Clearance No.: FTDI#516

The LC231X can support both 3.3V and 5V interfacing; the power jumper selection is through CN14. The

default jumper setting is in 3.3V interface.

Pin Number

Description

1-2

3.3V IO interface (Default)

2-3

5V IO interface

Table 3 - CN14 Jumper Selection

If user require a simple UART interface (TX,RX,CTS and RTS),user can use CN11 which follow standard

FTDI TTL interface. If user requires UART with full modem control and some extra configurable IO port,

user can consider use CN12 and CN13 which provide UART with full modem control and IO port. The pin

description of CN12 and CN13 is given by Table 4 and Table 5. Note the user could only fit either CN11

or CN12/CN13 connectors at the same time.

Pin

No

Pin Name

Type

Description

1

GND

Power

Ground

2

TXD

Output

Transmit Asynchronous Data Output

3

RXD

Input

Receiving Asynchronous Data Input

4

VBUS

Power

5V Supply at 450mA

5

CBUS0

GPIO

Configurable IO port

6

CBUS3

GPIO

Configurable IO port

7

RST

Input

FT231X Reset

Table 4 - CN12 Pin Description

Pin

No

Pin Name

Type

Description

1

RTS

Output

Request To Send Control Output/Handshake Signal

2

CTS

Input

Clear To Send Control Input/Handshake signal

3

DSR

Input

Data Set Ready Control Input/Handshake Signal

4

DTR

Output

Data Terminal Ready Control Output/Handshake

Signal

5

DCD

Input

Data Carrier Detect Control Input

6

RI

Input

Ring Indicator Input for Remote Wake Up

7

3V3

Power

3V3 Supply at 50mA

Table 5 - CN13 Pin Description