How to convert FT232BM into RS232 signals using MAX232?

ft232bm max232

As above! I need to convert the FT232BM chip into RS232 so that I can get the exact RS232 signals from it using the MAX232 chip. May I know how should I connect these 2 chips? The datasheet for FT232BM uses a different chip!

In fact, I have built a JDM programmer like this: https://www.olimex.com/dev/pic-pg1.html
But I want to connect it to the PC via FT232BM chip which provides me USB<->serial communication.

Thanks a lot!

max rs232 chip

Hi,
Look at Kit K149 on www.kitsrus.com you'll find a schematic using FT232B.
You can also look at the ftdichip.com you have a schematic of an USB to RS232 interface using MAX213.
CD

ft232bm jdm

The FTDI sell ready USB to serial cable.

On the other hand If a microcontroller is targeted to communicate via USB with a host, no MAX chip is needed -> the FT232BM can interface 5V or 3.3V logic directly with no need for level conversion. All needed are two signal wires + GND.

usb to rs232 with max232

RegUser_2 said:

The FTDI sell ready USB to serial cable.

On the other hand If a microcontroller is targeted to communicate via USB with a host, no MAX chip is needed -> the FT232BM can interface 5V or 3.3V logic directly with no need for level conversion. All needed are two signal wires + GND.

Click to expand...

I notice that they use a different chip such as MAX213 or SP213EHCA! I wonder if this means that MAX232 isnt suitable for converting the FT232BM to RS232 interface.

convert max232 to ft232

Hi, You can use MaX232 but MAX213 has five TX and RX converter, then you can interface all RS232 signals like TX, RX,CTS, DTR...

With MAX232 you can only interface TX and RX.

CD

ft232bm

Yes MAX232 is suitable, if you only want the Rx and Tx signals as crazyduck says.

The reason why they use MAX213 instead is because they use more signals than Rx and Tx in their refernce design.
Theses extra signal are handshake signals and Ring Indicator. They are nessasary for serial modems, but for normal RS232 signals to for example microcontrollers it is usally enough with Rx and Tx, so you can use any RS232 IC you like as long as it has at least one receive and one transmit converter.
MAX232 have two of each, so you can use this without problems and even have the option to connect the handshae signals.

If you want high-speed you have to look at the max speed ratings of the different RS232 chips, some are faster than others.

There are many different vendors of RS232 chips.
Two of the biggest are Maxim and Sipex.
Both Maxim and Sipex offer free samples of their IC's.