Re: [NTLK] The MP2000 has a faster (clocked?) CPU than the MP2100 ??? :-)

From: Humphreys, David (david.humphreys_at_honeywell.com)
Date: Mon Oct 22 2001 - 08:32:00 EDT


Adam,

This is a typo.
 
>Now check out this document:

>http://www.unna.org/unna/apple/documentation/MessagePad2000.sea.hqx

>CPU StrongARM 32-bit RISC processor
>167.9 MHz

>This info appears in two places in this document.

>The information doesn't appear to have been discussed before. For
>example this search:

>http://www.google.com/search?hl=en&q=messagepad+2000+167.9+MHz&btnG=Google+
Search

>(for messagepad 2000 167.9 MHz)

>and variants such as MP2000, MP2k turns up zero hits.

>My guess is that all MP2x00 Newtons are marginally overclocked to 167.9
>MHz.

>Since the difference is under 4% you'd need benchmark software to test
>for this.

>Regards,
>Adam

The SA-110 Microprocessor Technical Reference Manual, para. 8.2.3:

Core Clock Configuration (CCCFG)

4 pins on the uP set the clock multiplier.

With bits 1 and 2 high (CCCFG1 and CCCFG2) the frequency is 161.92MHz
(3.68MHz CLK x44).

The '1' was misread as a '7', hence the '167.9MHz'

As a whole number, 162MHz is the ONLY core clock for MP2x00 unless they have
been
modified.

Regards,

David Humphreys

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