MM232R FTDI, MM232R Datasheet - Page 10

• 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

4.2 Signal Descriptions
Pin No.
Table 4.1Module Pin Out Description
* When used in Input Mode, these pins are pulled to VCCIO via internal 200kΩ resistors. These pins can be
programmed to gently pull low during USB suspend (PWREN# = “1”) by setting an option in the internal
EEPROM
© Copyright 2010 Future Technology Devices International Ltd
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Name
SHEILD
VCC
VCCIO
VCC3O
TXD
RTS#
RXD
CTS#
CLK12
SLEEP#
RESET#
PWREN#
GND
VCC5O
USBPWR
SHEILD
Type
GND
PWR
Output
Output
Output
Input
Input
Output
Output
Input
Output
GND
PWR
Output
GND
Description
Configurable CBUS I/O Pin. Function of this pin is configured in the device internal
EEPROM. Factory default pin function for the MM232R module is SLEEP# - Goes
low during USB suspend mode. Typically used to power down an external TTL to
RS232 level converter I.C. in USB to RS232 converter designs. This pin is the
FT232RQ‟s CBUS4 See CBUS Signal Options, Table 4.2.*
Configurable CBUS I/O Pin. Function of this pin is configured in the device internal
EEPROM. Factory default pin function for the MM232R module is PWREN# - Goes
low after the device is configured by USB, then high during USB suspend. Can be
used to control power to external logic P-Channel logic level MOSFET switch.
Enable the interface pull-down option when using the PWREN# pin in this way.
See CBUS Signal Options, Table 4.2.*
Module 3.3V - 5.25V power supply input. To power the module from the 5V supply
on USB bus connect pins 15 (USBPWR) and 14 (VCC50) together
5V Power output USB port. For a low power USB bus powered design, up to
100mA can be sourced from the 5V supply on the USB bus. A maximum of 500mA
can be sourced from the USB bus in a high power USB bus powered design.
Connect to Pin 14 (VCC50) to power the MM232R module from the USB bus.
USB Cable shield.
To power the module from the 5V supply on USB bus connect pins 15 (USBPWR)
and 14 (VCC50) together. In this case this pin becomes a 5V output, and can be
used to supply the VCCIO pin, or to supply external logic. To use the MM232R
module in a self powered configuration supply an external 3V - 5V supply to this
pin, and do not connect together pins 15 and 14
+1.8V to +5.25V supply to the FT232RQ‟s UART Interface and CBUS I/O pins. In
USB bus powered designs connect to 3V3 to drive out at 3.3V levels (connect
VCCIO to VCC3O), or connect to VCC to drive out at 5V CMOS level (connect
VCCIO to VCC). This pin can also be supplied with an external 1.8V - 2.8V supply
in order to drive out at lower levels. It should be noted that in this case this
supply should originate from the same source as the supply to Vcc. This means
that in bus powered designs a regulator which is supplied by the 5V on the USB
bus should be used.
3.3V output from integrated L.D.O. regulator. This pin is decoupled to ground on
the module pcb with a 100nF capacitor. The prime purpose of this pin is to
provide the internal 3.3V supply to the USB transceiver cell and if required. This
pin can also be used to supply the FT232RQ‟s VCCIO pin by connecting this pin to
pin 3 (VCCIO).
Transmit Asynchronous Data Output.*
Request To Send Control Output / Handshake signal.*
Receive Asynchronous Data Input.*
Clear to Send Control input / Handshake signal.*
Configurable CBUS I/O Pin. Function of this pin is configured in the device
internal EEPROM. Factory default pin function for the MM232R module is 12MHz
Clock output. See CBUS Signal Options, Table 4.2.*
Can be used by an external device to reset the FT232RQ. If not required can be
left unconnected, or pulled up to VCCIO
Module ground supply pins
USB Cable shield.
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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