UM245R FTDI, UM245R Datasheet - Page 19

• Manufacturer Part Number: UM245R
• Description: Interface Modules & Development Tools USB to Parallel FIFO Dev Mod for FT245R
• Manufacturer: FTDI
• Type: Development Moduler

Specifications of UM245R

• Interface Type: USB, Parallel FIFO
• Data Bus Width: 8 bit
• Operating Supply Voltage: 1.8 V to 5.25 V
• Product: Interface Modules
• Supported Devices: FT245R
• Svhc: No SVHC (18-Jun-2010)
• Development Tool Type: Development Kit
• Kit Features: Single Chip USB To Parallel FIFO Bidirectional Data Transfer Interface
• Rohs Compliant: Yes
• Mcu Supported Families: FT245RL
• Supported Families: FT245RL
• Tool / Board Applications: USB To Parallel FIFO Interface
• For Use With/related Products: FT245R
• 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 UM245R in a typical USB bus powered design configuration. This can easily be
done by fitting the jumper link on J2, as shown above. The UM245R 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 UM245R 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
MCU would take its power supply from the USB bus (either the 5V on the USB pin, or the 3.3V on the 3V3
pin).
© Copyright 2009 Future Technology Devices International Ltd
i)
ii) On USB Suspend the device must draw no more than 500μA (2.5mA if remote wake-up is
iii) A Bus Powered High Power USB Device (one that draws more than 100mA) should use the
iv) A device that consumes more than 100mA cannot be plugged into a USB Bus Powered Hub.
v) No device can draw more that 500mA from the USB Bus.
Module Configurations
On plug-in to USB, the device must draw no more than 100mA.
enabled).
PWREN# pin to keep the current below 100mA on plug-in and 500μA/2.5mA on USB suspend.
UM245R USB - Parallel FIFO Development Module Datasheet Version 1.04
Document Reference No.: FT_000202
Section
Clearance No.: FTDI# 124
7.2), except that the
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