UC232R “ChiPi” Minimum Component FT232RL USB to RS232 Converter Cable
Datasheet Version 0.90 © Future Technology Devices International Ltd. 2005
Page 9
6. 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 the FT232RL used on the
UC232R are shown in Table 2.
Table 2 - 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 final test of the UC232R module.
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
Product Description Chipi USB <-> Serial
Max Bus Power Current 100mA
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 PWREN# Default configuration of CBUS0 - Power enable. Low after USB
enumeration, high during USB suspend.
CBUS1 PWREN# Default configuration of CBUS1 - Power enable. Low after USB
enumeration, high during USB suspend.
CBUS2 PWREN# Default configuration of CBUS2 - Power enable. Low after USB
enumeration, high during USB suspend.
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. Used to
power down the UC232R’s RS232 level converter IC.
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.
