EVAL 232R FTDI, Future Technology Devices International Ltd, EVAL 232R Datasheet - Page 7

• Manufacturer Part Number: EVAL 232R
• Description: MOD EVAL USB - RS232 DEV FT232RL
• Manufacturer: FTDI, Future Technology Devices International Ltd

Specifications of EVAL 232R

• Main Purpose: Interface, USB 2.0 to UART (RS232) Bridge
• Embedded: No
• Utilized Ic / Part: FT232R
• Primary Attributes: Full Speed, Rates of 300 ~ 3 MBaud, Security ID Number
• Secondary Attributes: 6 ~ 48MHz Clock Generator Output, Royalty-Free Drivers
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 768-1023; EVAL 232R

Table 1 - Module Pin Out Description - Jumper J1
Table 2 - Module Pin Out Description - 8 Pin Header J2
Table 3 - Module Pin Out Description - Jumper J3
* 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.
EVAL232R FT232RL USB to RS232 Evaluation Module Datasheet Version 0.90
Pin No. Name
1
2
3
Pin No. Name
1
2
3
4
5
6
7
3
Pin No. Name
1
2
3
3
3.2 Header Pin and Jumper Signal Descriptions
VCC
VCCIO
VCC3O
VCC
CBUS0
CBUS1
CBUS2
CBUS3
VCC3O
RESET#
GND
CBUS0
LP1
CBUS1
LP2
Type
Output
Input
Output
Type
Output
Input
Output
Output
Output
Output
Input
GND
Type
Output
Input
Output
Intput
Description
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.
+1.8V to +5.25V supply to the FT232RL’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 (like the EVAL232R for example)
a regulator which is supplied by the 5V on the USB bus should be used.
3.3V output from FT232RL’s 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 trans-
ceiver cell and the internal 1.5kΩ pull up resistor on USBDP. Up to 50mA can be drawn from this pin to power
external logic if required. This pin can also be used to supply the FT232RL’s VCCIO pin by connecting this pin
to pin 3 (VCCIO).
Description
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.
Configurable CBUS I/O Pin. Function of this pin is configured in the device internal EEPROM. Factory default
pin function for the EVAL232R module is RXLED#. See CBUS Signal Options,
Configurable CBUS I/O Pin. Function of this pin is configured in the device internal EEPROM. Factory default
pin function for the EVAL232R module is TXLED#. See CBUS Signal Options,
Configurable CBUS I/O Pin. Function of this pin is configured in the device internal EEPROM. Factory default
pin function for the EVAL232R module is PWREN#. See CBUS Signal Options,
Configurable CBUS I/O Pin. Function of this pin is configured in the device internal EEPROM. Factory default
pin function for the EVAL232R module is PWREN#. See CBUS Signal Options,
3.3V output from FT232RL’s 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 trans-
ceiver cell and the internal 1.5kΩ pull up resistor on USBDP. Up to 50mA can be drawn from this pin to power
external logic if required.
Can be used by an external device to reset the FT232R. If not required can be left unconnected, or pulled up
to VCCIO.
Module ground supply pins
Description
Configurable CBUS I/O Pin. Function of this pin is configured in the device internal EEPROM. Factory default
pin function for the EVAL232R module is RXLED#. See CBUS Signal Options,
Connect to LP1 to drive the red receive data LED (module default)
Red receive data LED
Configurable CBUS I/O Pin. Function of this pin is configured in the device internal EEPROM. Factory default
pin function for the EVAL232R module is TXLED#. See CBUS Signal Options,
Connect to LP2 to drive the green transmit data LED (module default)
Green transmit data LED
© Future Technology Devices International Ltd. 2005
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