Yes, intenal RC oscillatro, plus or minus depending on temperature,
manufacturing tolerances, phase of the moon, etc.  Check the datasheet.

Dale
--
"Curiosity is the very basis of education and if you tell me that
curiosity killed the cat, I say only the cat died nobly."
          - Arnold Edinborough


On Wed, 24 Jul 2002, Sid Weaver wrote:

> Does the 16F628 have an internal 4Mhz oscillator ?  If so, is it RC or xtal ?

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