Bita Sobhani

General purpose I/O voltage level problem - Added p/n MC1321x zigbee

Discussion created by Bita Sobhani on Oct 13, 2008
Latest reply on Oct 13, 2008 by bigmac
Hi all
I am working on MC1321x zigbee  wireless network.
I need more general purpose I/O than what is available on the board.
I used 74LS374 for adding more I/O ports.
The problem is that 74LS374 uses 5Volt Vcc. However its high output voltage is measured about 3.8Volt which is not too larger than 3Volt(high voltage level of the board). Can I connect this 3.8Volt directly to an input general purpose port of the board or I have to convert it to 3Volt. If so, how can I do that?
Thanks alot 


Message Edited by NLFSJ on 2008-10-13 12:59 PM

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