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TMS320F28027: MCP4921 DAC interface with F28027 Launchpad

Part Number: TMS320F28027

Hi Tech Guys, I am using F28027 Launchpad. I need to see ADC signals using an external DAC.

I want to use MCP4921 DAC IC  to see analog equivalent using MATLAB Simulink SPI block. 

My concern is that I don't  see any clock at SCK GPIO pin. It is continuous high (3.3 V). Does anyone help me for this SPI interface?