USB-RS485-PCBA FTDI, Future Technology Devices International Ltd, USB-RS485-PCBA Datasheet - Page 15

• Manufacturer Part Number: USB-RS485-PCBA
• Description: MODULE USB-RS485
• Manufacturer: FTDI, Future Technology Devices International Ltd
• Series: USBmadeEZ-UARTr

Specifications of USB-RS485-PCBA

• Convert From (adapter End): USB-A Male
• Convert To (adapter End): PCB
• Features: USB to RS485 Adapter PCB Assy w/ Embedded Controller and LEDs, 3MBaud
• For Use With/related Products: Windows® 2000 or higher, Linux, Max OS X
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 768-1043

Appendix A – PCB EEPROM Configuration
Each USB-RS485-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
USB Vendor ID (VID)
USB Product UD (PID)
Serial Number Enabled?
Serial Number
Pull down I/O Pins in USB
Suspend
Manufacturer Name
Product Description
Max Bus Power Current
Power Source
Device Type
USB Version
Remote Wake Up
High Current I/Os
Load VCP Driver
Invert TXD
Invert RXD
Invert RTS#
Invert CTS#
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 © 2010 Future Technology Devices International Limited
Bus Powered
See Note
See note
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Enabled
Enabled
FT232R
0403h
6001h
90mA
Value
0200
FTDI
Yes
FTDI default VID (hex)
FTDI default PID (hex)
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).
USB-RS485-PCB
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.
Signal on this pin becomes RXD# if enable.
Signal on this pin becomes RTS if enable.
Signal on this pin becomes CTS if enable.
USB to RS485 UART Serial Converter PCB
Notes
Document Reference No.: FT_000120
Clearance No. FTDI#80
14
Version 1.1
Datasheet