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FT232BL
- Serial USB UART IC (Lead free)
FT245BL
- Parallel USB FIFO IC (Lead free)
All
new designs should use the new "Rx" family of chips and modules.
FTDI
"R" Series Chips and FTDI
"R" Series Modules
These
devices have been further simplified by fully integrating the external
EEPROM, clock circuit and USB resistors onto the device.
Tape/Reel
only stocked. (Pictured)
Please
Note Dec-2008 **** These BL Family of devices are now considered
obsolete and large quantities are no longer stocked, and may need to be
ordered in.
We
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.
The
FT232BM and FT245BM are obsolete and replaced with the Lead Free FT232BL
and FT245BL.
See
the attached
document which summarizes the RoHS compliant (lead free device) equivalents
of our standard (non-lead free devices)
We
are gradually moving from non-Pb free to Pb-free throughout the course
of the rest of this year. Functionally, the lead free and the non-lead
free devices are exactly the same. The only difference that customers should
be aware of is that lead free devices will require a slightly higher
solder reflow temperature. If you have any questions, please ask, as
we may substitute a lead free device if a non-lead free device is ordered.
Additional
Technical Information:
13-Oct-2005
When
you call a write command you will experience a delay from the software
command being sent to data appearing on the converters pins.
This
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
the
converter for clock conversion.
With
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
from
the device to the PC. The default latency is 16ms.
The
delay between individual bytes is negligible if you sent the data in packets
as opposed to calling the write command for each separate byte.
Regards,
Gordon Lunn Support EasySync Ltd
8-Sep-2005
The
FT232BM/BL only supports 7 or 8 Bit Data and 1 or 2 Stop Bits.
To
convert an AM board to a BM device : (From FTDI Engineering 17-Oct-2002)
1)
TEST Pin 5 becomes an Output (RSTOUT) and so if directly connected to GND
this track must be cut.
2)
RCCLK Pin 31 becomes the TEST pin so remove the pullup resistor and the
cap on RCCLK and
short
the cap position to GND.
This
will then let the BM part run on the AM board.
24-Jan-2003
The
crystal has nothing to do with the baud rate.
The
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.
A custom
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.
Best
Regards,
Keith
Dingwall
Applications
Engineer
FTDI
Support
Support:
1)
Do you need additional support on this product?
2)
You can't find the information you need in the documentation?
3)
You have upgraded your operating system, and the current software doesn't
cover it?
4)
You need the driver software?
5)
You need a list of the Operating Systems this product will operate with?
(Covers virtually everything).
6)
Any questions not covered in the above list?
Then
please click here.
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