> What exact processor clock is used depends partly on your fuse
> settings. If your fuse setting are setup to use the 16MHz crystal,
> then the processor clock will run 16,000,000 times/sec.
I am using the fuse settings shown here:
http://docwiki.gumstix.org/Robostix_gumstix_ISP (i.e. uisp
--wr_fuse_l=0xbf --wr_fuse_h=0xc9 --wr_fuse_e=0xff)
How fast is the ATmega128 microcontroller running? I can't find any
information in the datasheet.
From: Dave Hylands <dhylands@gm...> - 2007-07-10 22:18:19
> I am using the fuse settings shown here:
> http://docwiki.gumstix.org/Robostix_gumstix_ISP (i.e. uisp
> --wr_fuse_l=0xbf --wr_fuse_h=0xc9 --wr_fuse_e=0xff)
> How fast is the ATmega128 microcontroller running? I can't find any
> information in the datasheet.
Page 289 of the ATMega128 datasheet shows the fuse bits.
We're interested in CKOPT, SUT0, SUT1, CKSEL0 thru 3.
>From the fuses above, CKOPT=0, SUT=11, and CKSEL=1111
Page 35-39 in the datasheet talks about the clocking options. From
page 36, CKOPT = 0 CKSEL=111x means using an external crystal of 8+
MHz. Page 37 further shows that the startup time will be 16K clocks +
Since the robostix has a 16MHz crystal, the CPU will, in fact, be
running at 16 MHz.
Vancouver, BC, Canada