[maemo-developers] [maemo-developers] Nokia 770 CPU clock frequency question

[From: Siarhei Siamashka]

Hello all,

We have a discussion about Nokia 770 specs in some Russian speaking
forum. We figured out that there is different information about
Nokia 770 cpu clock frequency floating around.

Some sources report 220MHz:
http://maemo.org/maemowiki/Nokia_770_Hardware_Specification
The others report 250MHz:
http://en.wikipedia.org/wiki/Nokia_770

I have written a small test program that tries to measure cpu clock
frequency and it clearly shows 250MHz which confirms wikidepia
information: http://ufo2000.sourceforge.net/files/testfreq.tar.gz

# ./testfreq
CPU clock: 251.26MHz
Time spent for testing: 35.82 seconds

But there is some person who claims that he is providing Nokia 770
repairy and that he has an official service manual from Nokia. And
according to his information, Nokia 770 has 220MHz cpu and no other
frequency options are possible. So he claims that it is he who has
the precise information and I am just trying to deceive people :(

Well, I believe my own eyes, and if it performs as 250MHz cpu, it can't
have clock frequency 220MHz. Could anybody from Nokia clarify this
information?

Also as cpu frequency does not seem to be well defined which results in
contradictory information, might it be an indication that the next
hardware revisions of Nokia 770 might have a clock frequency 220MHz
(standard for OMAP1710) in order to reduce device cost for example 
(after software update improves performance to the sufficient level)?