Interfacing ADS5231 to stellaris LM3S9D90

pramod kumar raman said:

I want to interface ADS5231 12 bit parallel ADC with  Stellaris LM3S9D90. How can i interface this 12 parallel pins  to stellaris as they have 8 bit ports and do not have 16 or 32 bit port as LPC2194.

 Hi Pramod, this forum is for MSP430, the adc you wish to interface is too fast to use on a port so you need connect to EMIF port of LM3S9D90 and transfer by DMA, EMIF can be configured as 8,16 or 32 bit so configure as 16bit and pad the remaining 4 bit to 0. I suppose the best is to interpose an FPGA or a fast CPLD between ADC and Stellaris chip.

 Another way to interface it is thru i2s interface, ADC cannot run at max sampling rate but is more simple to interface.

Regards

Roberto