Do I have to
use the latest drivers for the FT232R and FT245R?
No. The FT232R and FT245R are treated by the driver in the same
way as the BM series devices, so any driver that worked with the BM
series devices will work with the R series devices. Some new
functionality (e.g. EEPROM programming functions in the D2XX driver) may
require the most recent drivers. Any existing application code
written for the AM or BM series devices should work with R series
devices, requiring no or minimal changes (e.g. EEPROM structure).
Why does my FT232R/FT245R
prompt me for drivers each time I connect a different device when my
FT232BM/FT245BM did not?
Windows installs devices
according to serial number. If a device is connected with a new
serial number, Windows sees the device as a new one and asks the user
which drivers it should install for it. It is likely that the BM
series devices used either had no EEPROM fitted, the EEPROM was blank or
they were programmed with the same serial number. The R series
devices have an internal EEPROM which is given a unique serial number
during manufacture, so each R series device will need to be installed
when it is connected. There are ways to minimise the effect of
this, such as using location IDs (see
AN232B-07 Configuring FTDI's
VCP Drivers to use Location ID's)
which would install a device by it's physical location on the bus rather
than according to it's serial number, allowing the same USB port to be
used for devices of the same type with different serial numbers without
re-installing the driver.
Do the FT232R and FT245R
contain the MPSSE from the FT2232C device?
No. For applications
requiring the MPSSE (e.g. USB-JTAG, USB-I2C, USB-SPI, etc.) the
currently the only device available.
Are the FT232R and FT245R
pin compatible with the BM series devices?
No. This is due to
external components (EEPROM, clock source and series resistors) being
absorbed into the FT232R and FT245R devices. The FT232R and
FT245R are available in 28-pin SSOP and 32-pin QFN packages while the
BM series devices were available in 32-pin LQFP and 32-pin QFN
Are the FT232R and FT245R replacing previous generations of FTDI's
Although the new
FT232R and FT245R chips are recommended for new designs, there are
currently no plans to stop producing the two previous generations of
these devices FT232BM/FT23BL/FT245BM/FT245BL (second generation) and
FT8U232AM/FT8U245AM (first generation).