FT232R USB UART I.C. Datasheet Version 1.04

© Future Technology Devices International Ltd. 2005

Page 28

10. Internal EEPROM Configuration

Following a power-on reset or a USB reset the FT232R will scan its internal EEPROM and read the USB configuration

descriptors stored there. The default values programmed into the internal EEPROM in a brand new device are defined

in Table 18.

Table 18 - Default Internal EEPROM Configuration

Parameter

Value

Notes

USB Vendor ID (VID)

0403h

FTDI default VID (hex)

USB Product ID (PID)

6001h

FTDI default PID (hex)

Serial Number Enabled?

Yes

Serial Number

See Note

A unique serial number is generated and programmed into the EEPROM

during device final test.

Pull Down I/O Pins in USB Suspend

Disabled

Enabling this option will make the device pull down on the UART interface

lines when the power is shut off (PWREN# is high)

Manufacturer Name

FTDI

Manufacturer ID

FT

Serial number prefix

Product Description

FT232R USB UART

Max Bus Power Current

90mA

Power Source

Bus Powered

Device Type

FT232R

USB Version

0200

Returns USB 2.0 device descriptor to the host. Note: The device is be

a USB 2.0 Full Speed device (12Mb/s) as opposed to a USB 2.0 High

Speed device (480Mb/s).

Remote Wake up

Enabled

Taking RI# low will wake up the USB host controller from suspend.

High Current I/Os

Disabled

Enables the high drive level on the UART and CBUS I/O pins

Load VCP Driver

Enabled

Makes the device load the VCP driver interface for the device.

CBUS0

TXLED#

Default configuration of CBUS0 - Transmit LED drive

CBUS1

RXLED#

Default configuration of CBUS1 - Receive LED drive

CBUS2

TXDEN

Default configuration of CBUS2 - Transmit data enable for RS485

CBUS3

PWREN#

Default configuration of CBUS3 - Power enable. Low after USB

enumeration, high during USB suspend.

CBUS4

SLEEP#

Default configuration of CBUS4 - Low during USB suspend.

Invert TXD

Disabled

Signal on this pin becomes TXD# if enabled.

Invert RXD

Disabled

Signal on this pin becomes RXD# if enabled.

Invert RTS#

Disabled

Signal on this pin becomes RTS if enabled.

Invert CTS#

Disabled

Signal on this pin becomes CTS if enabled.

Invert DTR#

Disabled

Signal on this pin becomes DTR if enabled.

Invert DSR#

Disabled

Signal on this pin becomes DSR if enabled.

Invert DCD#

Disabled

Signal on this pin becomes DCD if enabled.

Invert RI#

Disabled

Signal on this pin becomes RI if enabled.

The internal EEPROM in the FT232R can be programmed over USB using the utility program MPROG. MPROG can

be downloaded from the FTDI website. Version 2.8a or later is required for the FT232R chip. Users who do not have

their own USB Vendor ID but who would like to use a unique Product ID in their design can apply to FTDI for a free

block of unique PIDs. Contact FTDI support for this service.