> There does not seem to be any typical or otherwise figures on
> clock frequency vs. DC bias resistor on this part. The datasheet
> (DS40300B-page 98) refers to the "Electrical Specification"
> section, which doesn't seem to have anything in it, only min/max
> frequency numbers with no indication of what resistances would
> be required to produce those frequencies.
>
> Anyone have even one data point for this? Eg. with a 100K
> resistor, I get XX MHz clock.

My post, 16th Jan 2002 [PIC]: 16f628 external resistor frequency

These are practical measurements for 16F628-04

   R        Clkout * 4

  2k7    9.40MHz
  3k3    9.35
  4k7    9.23
 10k     8.44
 22k    5.65
  39k    3.50
100k    1.52
220k    0.75 MHz
470k    0.393
  1M     0.192
1M5     0.124
2M2     85,600 Hz
5M6     36,400
12M     16,400

--
http://www.piclist.com hint: To leave the PICList
mailto:piclist-unsubscribe-request@mitvma.mit.edu