GPIOs micro2440

Hello,

I want to use the micro2440 in a project (automation control) but i need at
least 32 GPIO (inputs and outputs to control external hardware).

How many GPIO can i get with micro2440?

Thanks.

Well, the datasheet says 130 ports are available on the processor.  The
header on the mini2440 lets you get to around 20 of them.  I think you
could find a thread about someone using the camera interface for another ?
number of ports.

A common method is to use a port-expander, which I also think you will find
some threads.

Ok. 20 it's not be enough, maybe will be necessary use the I/O expander
using the I2C present in the board.

Thanks Davef.

Best regards!

If you do not need a CPU pin routed to an external connector for one of the
available special/native functions at this pin, you can use it as a GPIO
instead. E.g. there are more than 20 available.

Juergen Beisert,

What a kind of pins? CAM? PB and PC connector?

What about CON5

Any problems using some of the free LADDR pins?

Osvaldo,

I have Micro2440 and you asked about the GPIOs

There is one really mess-up file for the micro2440 with wrong pins. Be
warned. The file that you are looking for is attached to this message.
(look for the date it has to be 05.07.2009 or later)

Right now I'm also looking for the correct pins to GPIOs.

For now I can say that CON6 AIN0, AIN1, AIN2 can be accessed. I'm looking
for some more pin-GPIO.

GPIO193 is EINT9 and is on the HEADER C pin 2(PC2) directly on the
micro2440 board not on the SDK.