Hi Abhinav, As above answer, the SPI interface is a simple requirement. You need provide more information. Give you a check list: 1. Flash and RAM size? 2. Pin numbers (GPIO numbers)? 3. Sample rate? 4. Other peripherals? LCD? Timer? RTC? I2C? Comprator? etc. 5. CPU based filtering? floating point process? There have some MSP430 SOCs with integrated 24 bit ADC and segment LCD which is designed for ECG application. Please search in below page. www.ti.com/.../products.html B.R Winter
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