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

From: David Williams (davidwilliams@ozemail.com.au)
Date: Thu Feb 03 2000 - 19:42:25 EST


Please ignore my comment about 5V is OK below. This is what happens when a software
head thinks he knows something about hardware. I beleive it still needs more info
from Motorola.
Dave.

David Williams wrote:

> 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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