beagleboard UART connecting problem


I am new to beagleboard,i try to connect my serial port in windows to see hyperterminal…but i didnt see any thing in terminal window…i dont know whats the problem…can anyone tell me what to do?what will the problem?

I selected

Bits per second :115200

Data bits :8

Parity :none

stop bits : 1

Flow control :none

After giving all this details i selected “apply” and “ok”…but i didnt get anything on my terminal window…help me


See Do you get characters with pins 2 and 3 tied together on your cable? Do you see the “40T” or “40V” when you apply power?

i dont understand what you are coming to say is…because i am newbie…

what is meant by getting characters with pins 2 and 3 tied together on your cable?

i just connected my serial port to beagleboard which have 10 pins indicated as RS232 with thw connector…

what is meant by “40T” or “40V”?

i got 4 LED is on when connected to power supply…That is PWR,USR0,USR1,PMU STAT(near RS232 pin)

Still not getting anything when i connect to hyper terminal…

Main thing is i didnt have my MMC card…Just i connected the serial port connection and checking whether the board is working properly…but i didnt get anything in my hyper terminal window…help me

I also faced a similar problem in the begining, and its because there are 2
types of RS-232 headers available in the market, and they differ wrt the
pinout as shown.

Type 1 : 10 9 8 7 6
               1 2 3 4 5

Type 2 : 2 4 6 8 10
               1 3 5 7 9

The Beagle Board requires the Latter one (2). The one I purchased turned out
to be the other one (type 1), so it didn't work.

I just made my own RS-232 Header according to the Pin config described in
the SRM and it works well. Only pins 2 (TX), 3 (RX) & 5 (GND) are required
so its very simple.

You can check the Pin configuration of your available RS-232 Header with a
Multimeter and confirm if its according to the BeagleBoard Pinout. If you
the Pinout is OK, try using a reverser as well with your NULL Modem
Cable. Your NULL Modem Cable might be faulty.


Read section 13 of the Systems Reference Manual.
It takes you step by step to make sure you have all of the correct cables for the serial port. Pins 2 and 3 are the transmit and receive pins of a serial cable.