Admin at 10:57, 24 August 2013

2013-08-24T10:57:03Z

Admin: Created page with "= Action = Sets the clock divisor. =
2013-02-07T19:20:35Z

Created page with "= Action = Sets the clock divisor. = Action =

Sets the clock divisor.

 

 

= Syntax =

CONFIG CLOCKDIV = constant

 

= Remarks =
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constant

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The clock division factor to use. Possible values are 1 , 2 , 4 , 8 ,16 , 32 ,64 , 128 and 256.

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The options to set the clock divisor is available in most new chips. Under normal conditions the clock divisor is one. Thus an oscillator value of 8 MHz will result in a system clock of 8 MHz. With a clock divisor of 8, you would get a system clock of 1 MHz.

Low speeds can be used to generate an accurate system frequency and for low power consumption.

Some chips have a 8 or 16 division enabled by default by a fuse bit.

You can then reprogram the fuse bit or you can set the divisor from code.

 

When you set the clock divisor take care that you adjust the $CRYSTAL directive also.

$CRYSTAL specifies the clock frequency of the system. So with 8 MHz clock and divisor of 8 you would specify $CRYSTAL = 1000000.

 

 

= See also =

[[$CRYSTAL]]

 

 

= Example =

 <source lang="bascomavr">
CONFIG CLOCKDIV = 8 'we divide 8 MHz crystal clock by 8 resulting in 1 MHz speed
</source> {{Languages}}

[[Category:BASCOM Language Reference]]

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 $CRYSTAL specifies the clock frequency of the system. So with 8 MHz clock and divisor of 8 you would specify $CRYSTAL = 1000000.
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