High Voltage Differential
MCP3002 ADC interfacing with ATMega162?
I am trying to use one of these to get analog sensor data into my ATMega162, but the pinout and communication proceedure is baffling me a bit.
Datasheet can be found here: http://ww1.microchip.com/downloads/en/DeviceDoc/21294C.pdf
I have tied Vcc to +5v, and Vref to GND. My sensor data will come through CH0 or CH1 (probably will be pseudo-differential mode, so will tie one of them to Vcc, for the upper reference voltage), and Dout will pipe digital data to the AVR. But the other pins confuse me a little.
What would I tie CLK to? (I am using the internal osc @ 1mhz). Im thinking XTAL2 (internal osc output)?
And what does Din do, control the communication? Does this need a dedicated pin on the AVR?
Also, I am currently tieing CS/SHDN to GND, my assumption is that:
"The CS/SHDN pin must be pulled high between conversions."
...means that it is also involved in communications somehow.
Can someone explain all of this please?
Oh, well if you kinda think about it you should use the XTAL2, give it a shot, the Din doesnt exactly control the communication it just really helps it out a little if you know what i mean but you should def. have a dedicated pin on the AVR.
good luck
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