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14 bit pwm on 18f452

 
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14 bit pwm on 18f452
PostPosted: Wed Mar 02, 2005 11:33 am     Reply with quote
Hi there,

this is not a specific question concerning ccs , but I hope someone can answer it anyway.

The datasheet of the 18F452 says on page 123 in tabke 14-4 that when you choose an update rate of the pwm of 2.44 khz you can get 14 bit of resolution from the pwm.
But on the other hand according to the datasheet you cann only set up 10 bit of resolution in CCPR1L an CCPR1H<5:4>.

So can I get 14 bit of resolution or is it prohibited by the hardware and table 14-4 shows only a theoretical value ?
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Wed Mar 02, 2005 12:44 pm     Reply with quote
The data sheet is not correct. Look in the 18F Reference Manual
on PWM for the correct tables. It's on page 13 at the following link:
http://ww1.microchip.com/downloads/en/DeviceDoc/39517.pdf
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