RE: Low voltage I/O for MPC555

The GPIO are 5V.  If the LCD interface is such that you can connect it
to the EBI external bus interface and use it as memory mapped I/O using
the chip selects, then the bus signals are all 3.3V.
 
- Allan

________________________________

From: [email protected] [mailto:[email protected]] On Behalf
Of brockmid
Sent: Tuesday, November 28, 2006 11:19 AM
To: [email protected]
Subject: [MPC500] Low voltage I/O for MPC555



Hello,
Are there any ports that can be used for I/O which are low voltage 
(i.e. less than 5 volts). Currently I am using GPIO (address: 0x306100) 
port but I dont see any option to use this in low voltage mode. I am 
interfacing this micro with an LCD which requires at most 3.3V for the 
data lines. I would like to connect directly to the LCD instead of 
using bus transceiver chips. Thanks for the help.

Brock



 


[Non-text portions of this message have been removed]