| Support | Upgraded your Operating
- Serial USB UART IC (Lead free)
- Parallel USB FIFO IC (Lead free)
new designs should use the new "Rx" family of chips and modules.
"R" Series Chips and FTDI
"R" Series Modules
devices have been further simplified by fully integrating the external
EEPROM, clock circuit and
resistors onto the device.
only stocked. (Pictured)
Note Dec-2008 **** These BL Family of devices are now considered
obsolete and large quantities are no longer stocked, and may need to be
will however always keep stock in the near future, for customers that have
used these ICs in their designs. Stock levels shown should be correct.
FT232BM and FT245BM are obsolete and replaced with the Lead Free FT232BL
document which summarizes the RoHS compliant (lead free device) equivalents
of our standard (non-lead free devices)
are gradually moving from non-Pb free to Pb-free throughout the course
of the rest of this year. Functionally, the lead free and
non-lead free devices are exactly the same. The only difference that customers
should be aware of is that lead free devices will
a slightly higher solder reflow temperature. If you have any questions,
please ask, as we may substitute a lead free
if a non-lead free device is ordered.
usually in stock.
may need a lead time of approx. 2 to 3 weeks.
only stocked. (Pictured)
require 1000 minimum quantity order, and 2 to 3 weeks delay normally.
you call a write command you will experience a delay from the software
command being sent to data appearing on the converters pins.
delay is approx 10ms due to the driver sending data to the host driver
which then schedules the transfer and the data finally being clocked into
converter for clock conversion.
regards to data being read, if the amount is less than 64 bytes then you
will wait for the latency timer to trigger to allow data to transfer
the device to the PC. The default latency is 16ms.
delay between individual bytes is negligible if you sent the data in packets
as opposed to calling the write command for each separate byte.
Gordon Lunn Support EasySync Ltd
FT232BM/BL only supports 7 or 8 Bit Data and 1 or 2 Stop Bits.
convert an AM board to a BM device : (From FTDI Engineering 17-Oct-2002)
TEST Pin 5 becomes an Output (RSTOUT) and so if directly connected to GND
this track must be cut.
RCCLK Pin 31 becomes the TEST pin so remove the pullup resistor and the
cap on RCCLK and
the cap position to GND.
will then let the BM part run on the AM board.
crystal has nothing to do with the baud rate.
USB MOD-01 uses an FT232AM chip. The application note, AN232-01 describes
how non-standard baud rates are calculated and how they can be set in the
driver using a technique called aliasing.
baud rate is selected by setting the value of a divisor. This value of
this divisor is calculated by dividing 3000000 by the required baud rate,
then using the closest allowed divisor value. One of the features of our
new FT232BM chip is a greater resolution of values available for this divisor.
The FT232BM is also available on the DLP USB232M development board.
Do you need additional support on this product?
You can't find the information you need in the documentation?
You have upgraded your operating system, and the current software doesn't
You need the driver software?
You need a list of the Operating Systems this product will operate with?
(Covers virtually everything).
Any questions not covered in the above list?
please click here.