Copyright © 2010 Future Technology Devices International Limited

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Document Reference No.: FT_000077

USB TO RS232 SERIAL CONVERTER RANGE OF CABLES Datasheet Version 1.3

Clearance No.: FTDI# 51

Appendix A - Cable EEPROM Configuration

Each USB-RS232 cable is controlled by the FTDI FT232R IC. This FT232R device contains an EEPROM

which contains the USB configuration descriptors for that device. When the cable is plugged into a PC or a

USB reset is performed, the PC will read these descriptors. The default values stored into the internal

EEPROM are defined in Table 0.1

Parameter

Value

Notes

USB Vendor ID (VID)

0403h

FTDI default VID (hex)

USB Product UD (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

Product Description

See note

USB-RS232-WE

Max Bus Power Current

90mA

Power Source

Bus Powered

Device Type

FT232R

USB Version

0200

Returns USB 2.0 device description to the host.

Note: The device is a USB 2.0 Full Speed device (12Mb/s)

as opposed to a USB 2.0 High Speed device (480Mb/s).

Remote Wake Up

Disabled

High Current I/Os

Enabled

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.

Invert TXD

Disabled

Signal on this pin becomes TXD# if enable.

Invert RXD

Disabled

Signal on this pin becomes RXD# if enable.

Invert RTS#

Disabled

Signal on this pin becomes RTS if enable.

Invert CTS#

Disabled

Signal on this pin becomes CTS if enable.

Table 0.1 Default Internal EEPROM Configuration

The internal EEPROM in the cable can be re-programmed over USB using the utility program MPROG.

MPROG can be downloaded from the www.ftdichip.com. 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.