Copyright © Future Technology Devices International Limited

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Document Reference No.: FT_000188

TTL TO USB SERIAL CONVERTER GENERIC CABLES Datasheet

Version 1.4

Clearance No.: FTDI# 129

Appendix A - Cable EEPROM Configuration

Each TTL-232RG 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 the following table

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

Product description depends on the cable. The following

lists a few of the Product description for each different

cable.

TTL-232RG-VSW3V3

TTL-232RG-VREG3V3

TTL-232RG-VREG1V8

TTL-232RG-VREGxVx

TTL-232RG-VIP

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).

Remote Wake Up

Disabled

500uA suspend limit when in this state

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.

Default Internal EEPROM Configuration