Part Number:ADS1220
Tool/software: Code Composer Studio
I am designing project which employed ADS1220 to measure ananlog. Now I meet with a SPI interface issues, that ADS1220 equips with 24bit SPI interface acted as slave, but normally MCU's SPI is 16bit interface acted as master, for example TI's ARM processor TM4C1294 series. It looks that SPI format is incompatible between TM4Cx and ADS1220. I configured MCU's GPIO as alternate functionality SPI mode, it has four wires, which are MOSI, MISO, CLK, and CS. The manual writes that after SPI sent 16 bit CS will become HIGH level automatically, and clock signal ends up. but ADS1220 needs 24 bit clock then CS become HIGH level. I don't know how to solve this issues. Many ADC SPI interface is 24bit in TI ADC catalog. I think this is a common problem. Any solution for me? thanks!