Now I am shifting the MCP3201 circuit from bread board to protoboard, at the same time adding a level shifter to convert 3V3 SPI signals to 5V0. MCP3201 only listens to Chip Select signal. So there is no need for another input signal to it. In other words, SPI only has 4 wires - Gnd, Clk, MISO, Chip Select.
.END
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