Some problems with the function of DAC on LPC1788FBD144 chip.

[明杰周]

1、I found that only P0[26] pin can be configured with DAC output.Is there only one DAC output pin on the chip?

2、The chip has a 10-bit digital analog converter,Is the maximum conversion value 1023?What happens if the conversion value is greater than 1023?

I'm looking forward to your reply!

[danielholala]

明杰周 wrote:

1、I found that only P0[26] pin can be configured with DAC output.Is there only one DAC output pin on the chip?

It seems, this is the maximum you get in the LPC family. At least I did not find an LPC microcontroller with more than 1 DAC.

[jeremyzhou]

Dear 明杰 周,

Thank you for your interest in NXP Semiconductor products and  the opportunity to serve you. 1、I found that only P0[26] pin can be configured with DAC output. Is there only one DAC output pin on the chip? --- Yes, it's. 2、The chip has a 10-bit digital analog converter,Is the maximum conversion value 1023?What happens if the conversion value is greater than 1023? --- The maximum value is 1024 and the output voltage will be equal to the VREFP even loads a conversion value which is greater than 1024. Have a great day. ----------------------------------------------------------------------------------------------------------------------- Note: If this post answers your question, please click the Correct Answer button. Thank you! -----------------------------------------------------------------------------------------------------------------------