UM232R FTDI, UM232R Datasheet - Page 17

• Manufacturer Part Number: UM232R
• Description: Interface Modules & Development Tools USB to Serial UART Dev Mod for FT232R
• Manufacturer: FTDI
• Type: Development Moduler

Specifications of UM232R

• Interface Type: USB, Serial, UART
• Data Bus Width: Serial
• Operating Supply Voltage: 1.8 V to 5.25 V
• Product: Interface Modules
• Supported Devices: FT232R
• Svhc: No SVHC (18-Jun-2010)
• Development Tool Type: Development Kit
• Kit Features: Single Chip USB To Asynchronous Serial Data Transfer Interface, Auto Transmit Buffer
• Rohs Compliant: Yes
• Supported Families: FT232RL
• Features: Single Chip USB To Asynchronous Serial Data Transfer Interface, Auto Transmit Buffer Control
• Tool / Board Applications: USB To
• For Use With/related Products: FT232R
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

7
7.1 BUS Powered Configuration
Figure 7.1 Bus Powered Configuration
Figure 7.1 illustrates the UM232R module in a typical USB bus powered design configuration. This can easily
be done by fitting the jumper link on J2, as shown above. The UM232R is supplied in this configuration by
default.
A USB Bus Powered device gets its power from the USB bus. Basic rules for USB Bus Power devices are as
follows:
Interfacing the UM232R module to a microcontroller (MCU), or other logic for a bus powered design would
be done in exactly the same way as for a self powered design (see
external logic would take its power supply from the USB bus (either the 5V on the USB pin, or 3.3V on the
3V3 pin).
© Copyright 2009 Future Technology Devices International Ltd
iv) A device that consumes more than 100mA cannot be plugged into a USB Bus Powered Hub.
iii) A Bus Powered High Power USB Device (one that draws more than 100mA) should use one of the
ii) On USB suspend the device must draw no more than 500μA.
v) No device can draw more that 500mA from the USB Bus.
i) On plug-in to USB, the device must draw no more than 100mA.
Module Configurations
CBUS pins configured as PWREN# and use it to keep the current below 100mA on plug-in and 500μA
on USB suspend.
UM232R USB - Serial UART Development Module Incorporating Clock Generator
Section
Document Reference No.: FT_000051
7.2), except that the MCU or
Clearance No.: FTDI# 125
Datasheet Version 1.04
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