DS_USB_RS232_PCB Datasheet, PDF (14/16 Pages) List of Unclassifed Manufacturers – Future Technology Devices International Ltd USB to RS232 UART Serial Converter PCB Datasheet

Document Reference No.: FT_000079
USB TO RS232 UART SERIAL CONVERTER PCB Datasheet Version 1.41
Clearance No.: FTDI# 52
Appendix A - PCB EEPROM Configuration
Each USB-RS232-PCB is controlled by the FTDI FT232R IC. This FT232R device contains an EEPROM which
contains the USB configuration descriptors for that device. When the PCB 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 Default Internal EEPROM Configuration
Parameter
Value
Notes
USB Vendor ID (VID)
0403h
FTDI default VID (hex)
USB Product UD (PID)
6001h
FTDI default PID (hex)
Serial Number Enabled?
Serial Number
Pull down I/O Pins in USB
Suspend
Manufacturer Name
Yes
See Note
Disabled
FTDI
A unique serial number is generated and programmed into
the EEPROM during device final test.
Enabling this option will make the device pull down on the
UART interface lines when the power is shut off (PWREN#
is high).
Product Description
See note
USB-RS232-PCB
Max Bus Power Current
90mA
Power Source
Bus Powered
Device Type
USB Version
Remote Wake Up
High Current I/Os
Load VCP Driver
Invert TXD
FT232R
0200
Disabled
Enabled
Enabled
Disabled
Returns USB 2.0 device description 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).
Enables the high drive level on the UART and CBUS I/O
pins.
Makes the device load the VCP driver interface for the
device.
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 on the PCB 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.
Copyright © 2011 Future Technology Devices International Limited
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