Copyright © 2010 Future Technology Devices International Limited

5

Document Reference No.: FT_000055

UB232R USB Mini-B FT232R Evaluation Module Datasheet Version 1.12

Clearance No.: FTDI# 43

3 Electrical Details

The electrical details and connections to the UB232R module are shown in Figure 3.1, Table 3.1 and Table

3.2.

Figure 3.1 UB232R Electrical Connections (Top View)

Silkscreen Pin

Connector Pin

Name

Description

1

J1-1

GND

OV Power pin

2

J1-2

VCC

+5V Power from USB Interface

3

J1-3

CTS#

FT232R CTS pin

4

J1-4

RTS#

FT232R RTS pin

5

J2-4

CBUS1

FT232R CBUS1 pin

6

J2-3

CBUS0

FT232R CBUS0 pin

7

J2-2

RXD

FT232R RXD pin

8

J2-1

TXD

FT232R TXD pin

Table 3.1 UB232R Module Connection

The signal output level on connectors J1 and J2 are controlled by the voltage supplied to the VCCIO pin 4

on the FT232R. The VCCIO is selected between the +5V (VCC from USB) or the output of the FT232R Low

Drop Out (LDO) +3.3V regulator. The VCCIO selection is done by fitting a link on connector J3. The

selection is shown in Table 3.2.

Connector J3

Function

Link 1-2

connected

VCCIO and RESET# driven connected to VCC (+5V)

Link 2-3

connected

VCCIO and RESET# driven connected to +3.3V output of FT232R LDO regulator

Table 3.2 UB232R Module VCCIO selection