how to insert 32 bit data to 31 pin

1nafar · **Joined:** Tue Sep 22, 2009 5:32 pm **Posts:** 1

hi all
i work on at91sam7x256
i need send 32 bit data to the port a but port a have 31 pin !!!
anybody can help me ?
I think we need 32 pin for this project.
Thanks.

Furuya · **Posted:** Mon Feb 01, 2010 1:50 pm

port A has 32 pins (0, 1, 2, ..., 31)

(you forgot pin 0

)

mjbcswitzerland · **Posted:** Mon Feb 01, 2010 8:03 pm

Hi

The SAM7X has 2 x 31 bit ports (bit31 is not connected to any pin).

This means that to use 32 bits it is necessary to spread the bits across the two ports (eg. 16 bits on port A and 16 bits on port B). Accesses will require two reads/writes so will not be as fast as a port with full 32 bit width could be. Whether this is acceptable depends on your exact requirements.

Regards

Mark

http://www.uTasker.com

Furuya · **Posted:** Mon Feb 01, 2010 8:15 pm

forgot to see chip type

how to insert 32 bit data to 31 pin

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