Other Parts Discussed in Thread: MSP430I2040, , CC3200
What could be the reason of MISO below? It does not answer.
I checked the probe operations are normal.
And the conditions are as below.
MSP430I2041 firmware : Smart Plug Reference Design (tidc791\MSP430i2040_Source\AFEmetrology\emeter-ng\Debug\Exe\EVM_i2040)
Schematic :
Powre Source : Temporarily forced DC 20V and confirmed that the voltage between V1+/- is 60mV.
Main MCU : ESP 32 BT/WiFi module (powered by USB)