Re: [uCsimm] Are the uCsimm I/O pins 5V Tolerant?

From: David Williams (davidwilliams@ozemail.com.au)
Date: Thu Feb 03 2000 - 17:02:55 EST


Hi Sam,

On page 2-3 of the 68EZ328 user manual it says

"Note: All pins, except EXTAL, support TTL levels. When EXTAL is used as
an input
clock, it needs a CMOS level. To ensure proper low-power operation, all
inputs
should be driven to CMOS level. More power is consumed when you use a
TTL
level to drive those inputs."

I think this is the info you require. So 5V is OK, but will cause system
to consume more power when going into low power modes.

Dave.

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