> As I understand it, 3.3V and 5V stuff have the same histeresis levels,
> so can interface directly. If that is not the case, there is certainly
> parts around that are designed to interface 3.3V to 5V.
> Many of our other chips (ie, the NS UARTs, 8390, etc) are available
> in 5V only. How hard is it to interface 3.3 to 5V? Is the R4200
> available in 5V? What about pricing on other MIPS R4000 series
> chips with a reduced bus?
3.3V is to reduce power consumption, which in turn allows the CPU to go
faster. The top of the line R4200 would only be available in 3.3V.
The *only* information I have on this is the article that was posted
here in this list. I will (probably next week) try to get information
out of MIPS (SGI). Last time I called SGI though, it was a nightmare.
Neil Russell (The wizard from OZ)
Pyramid Technology Email: firstname.lastname@example.org
3860 N. First Street Voice: (408) 428-7302
San Jose, CA 95134-1702 FAX: (408) 428-8845