topic Re: Some problems with the function of DAC on LPC1788FBD144 chip. in LPC Microcontrollers

Some problems with the function of DAC on LPC1788FBD144 chip.

明杰周 — Sat, 24 Feb 2018 01:51:50 GMT

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!

Re: Some problems with the function of DAC on LPC1788FBD144 chip.

jeremyzhou — Wed, 28 Feb 2018 01:59:04 GMT

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.

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Re: Some problems with the function of DAC on LPC1788FBD144 chip.

danielholala — Wed, 28 Feb 2018 11:32:04 GMT

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.