I have 16 bit data after ADC processing and i want to transfer it to DAC 8581 without using SPI of dspic. can you please support code for me to do it? Thanks you much!
Your DAC chip only has a SPI port to receive data on, so you must send the data in the SPI convention.
Many smaller pic chips do not have a hardware SPI port, but they can still communicate with a SPI device by software control, commonly called ' bit banging '.
A few searches of the forums should find you some code to work from that can adapt to a dspic.