ES-U-1001-R10(R100) Premier Gold USB-RS232 Adapter cable Data Sheet
Version 1.1
Document Reference No.: CP_000057 Clearance No.: CP#047
Copyright © Connective Peripherals Pte Ltd 8
2FT232R Key features
This section summarises the key features and enhancements of the FT232R IC device which is used
on the ES-U-1001-R10 USB to RS232 converter cable. For further details, consult the FT232R
datasheet, which is available from the FTDI website.
2.1 Integrated EEPROM
Previous generations of FTDI’s USB UART devices required an external EEPROM if the device were to
use USB Vendor ID (VID), Product ID (PID), serial number and product description strings other
than the default values in the device itself. This external EEPROM has now been integrated onto the
FT232R chip meaning that all designs have the option to change the product description strings. A
user area of the internal EEPROM is available for storing additional data. The internal EEPROM is
programmable in circuit, over USB without any additional voltage requirement.
2.2 Pre-programmed EEPROM
The FT232R is supplied with its internal EEPROM pre-programmed with a serial number
which is unique to each individual device. This, in most cases, will remove the need to program the
device EEPROM.
2.3 Lower Operating and Suspend Current
The device operating supply current has been further reduced to 15mA, and the suspend current
has been reduced to around 70μA. This allows greater margin for peripheral designs to meet the
USB suspend current limit of 500μA.
2.4 Low USB Bandwidth Consumption
The operation of the USB interface to the FT232R has been designed to use as little as possible of
the total USB bandwidth available from the USB host controller.
2.5 UART Pin Signal Inversion
The sense of each of the eight UART signals can be individually inverted by setting options in the
internal EEPROM. Thus, CTS# (active low) can be changed to CTS (active high), or TXD can be
changed to TXD#.
2.6 FTDIChip-ID™
Each FT232R is assigned a unique number which is burnt into the device at manufacture. This ID
number cannot be reprogrammed by product manufacturers or end-users. This allows the possibility
of using FT232R based dongles for software licensing. Further to this, a renewable license scheme
can be implemented based on the FTDIChip-ID™ number when encrypted with other information.
This encrypted number can be stored in the user area of the FT232R internal EEPROM, and can be
decrypted, then compared with the protected FTDIChip-ID™ to verify that a license is valid. Web
based applications can be used to maintain product licensing this way. An application note
describing this feature is available separately from the FTDI website.
2.7 Improved EMI Performance
The reduced operating current and improved on-chip VCC decoupling significantly improves the ease
of PCB design requirements in order to meet FCC, CE and other EMI related specifications.
