DAC80501 code support

hemnath · Joined: 03 Oct 2012 Posts: 228 Location: chennai

Hello,

I want to interface the PIC18F2520 with external 16 bit DAC (Example: DAC80501ZDQFR). Please can you support how to send data to the external DAC. Any code snippets to understand.

Internal Voltage reference: +2.5V

uC PIN SDO is connected to SDA
uC PIN SCK is connected to SCLK
uC PIN B1 is connected to SYNC/A0

Earlier I posted a topic for different DAC, but now would like to use this finally.

Thanks in advance.

dyeatman · Joined: 06 Sep 2003 Posts: 1912 Location: Norman, OK

Are you going to keep changing DACs then asking us for help with each one?
If you got the other one going, the same basic code should work for this one with changes to the command byte.

Starting out:
Read the datasheet...the interface is very similar to the earlier DAC.

Next:
For SPI you must tie SPI2C Low
Power on device
Set SYNC High

Then:
If needed, set/change bits in 8 bit command byte (0x08 for DAC output)
set SYNC Low
Output 8 bit command byte
Output 8 bit MSB SPI data
Output 8 bit LSB SPI data
Set SYNC High
Rinse and repeat...
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