MM232R FTDI, MM232R Datasheet - Page 14

• Manufacturer Part Number: MM232R
• Description: Interface Modules & Development Tools USB to Serial UART Mini Dev Mod FT232R
• Manufacturer: FTDI
• Type: Development Moduler

Specifications of MM232R

• Interface Type: USB, Serial, UART
• Data Bus Width: Serial
• Operating Supply Voltage: 1.8 V to 5.25 V
• Product: Interface Modules
• Supported Devices: FT232RQ
• Svhc: No SVHC (18-Jun-2010)
• Development Tool Type: Development Kit
• Kit Features: Single Chip USB To Asynchronous Serial Data Transfer Interface, Entire USB Protocol Handled
• Rohs Compliant: Yes
• Supported Families: FT232RQ
• Tool / Board Applications: USB To Serial UART Converter
• For Use With/related Products: FT232R
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 626-DLP-MM232R

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6.1 BUS Powered Configuration
Figure 6.1 Bus Powered Configuration
Figure 7.1 illustrates the MM232R in a typical USB bus powered design configuration. This is done by
connecting pin 15 (USBPWR) to pin 14 (VCC50). Pin 3 (VCCIO), the supply to the FT232RQ‟s UART and
CBUS IO pins, is connected to pin 2 (VCC). Doing this will make the UART and CBUS IO pins drive out at 5V
levels. A USB Bus Powered device gets its power from the USB bus. Basic rules for USB Bus power devices
are as follows –
i)
ii) On USB Suspend the device must draw no more than 500μA.
iii) A Bus Powered High Power USB Device (one that draws more than 100mA) should use PWREN# to
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.
The Figure also illustrates interfacing the MM232R module to a microcontroller (MCU) UART interface.
This example uses TXD and RXD for transmission and reception of data, and RTS# / CTS# hardware
handshaking. Also in this example the 12MHz clock output on pin 9 is used to clock the MCU. If the
MCU is handling power management functions, then this can be done by connecting PWREN# to an I/O
pin on the MCU.
© Copyright 2010 Future Technology Devices International Ltd
On plug-in to USB, the device must draw no more than 100mA.
keep the current below 100mA on plug-in and 500μA on USB suspend.
Module Configurations
MM232R USB - Serial UART Development Module Incorporating Clock Generator
Document Reference No.: FT_000214
Clearance No.: FTDI# 132
Datasheet Version 1.1
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