DS_FT231X Datasheet, PDF (32/44 Pages) List of Unclassifed Manufacturers – Future Technology Devices International Ltd FT231X

FT231X USB TO FULL HANDSHAKE UART IC
Datasheet
Version 1.2
Document No.: FT_000565 Clearance No.: FTDI# 261
8 Internal MTP Memory Configuration
The FT231X includes an internal MTP memory which holds the USB configuration descriptors, other
configuration data for the chip and also user data areas. Following a power-on reset or a USB reset the
FT231X will scan its internal MTP memory and read the USB configuration descriptors stored there.
In many cases, the default values programmed into the MTP memory will be suitable and no re-
programming will be necessary. The defaults can be found in Section 8.1.
The MTP memory in the FT231X can be programmed over USB if the values need to be changed for a
particular application. Further details of this are provided from section 0 onwards.
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. See TN_100 – USB Vendor ID/Product ID
Guidelines for more details.
8.1 Default Values
The default factory programmed values of the internal MTP memory are shown in Table 8.1.
Parameter
Value
Notes
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
DBUS Drive Current
Strength
DBUS slew rate
DBUS Schmitt Trigger
Enable
0403h
FTDI default VID (hex)
6015h
FTDI default PID (hex)
Yes
See Note
A unique serial number is generated and
programmed into the MTP memory during device
final test.
Disabled
Enabling this option will make the device pull down
on the UART interface lines when in USB suspend
mode (PWREN# is high).
FTDI
FT231X USB UART
90mA
Bus Powered
FT231X
0200
Returns USB 2.0 device description to the host.
Note: The device is a USB 2.0 Full Speed device
(12Mb/s) as opposed to a USB 2.0 High Speed
device (480Mb/s).
Enabled
Taking RI# low will wake up the USB host controller
from suspend in approximately 20 ms.
4mA
Options are 4mA, 8mA, 12mA, 16mA
Slow
Options are slow or fast
Normal
Options are normal or Schmitt
Copyright © 2013 Future Technology Devices International Limited
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