Single-Phase Electric Meter With Isolated Energy ...

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UTXD0 RS 232 BRIDGE V1-/ Vref(O) SPI Vref(I) URXD0 HF crystal 8 MHz XT2 IN XT2OUT Analog to Digital I In V In AC mains V1+ I1+ I1-N L RST VSS VCC LOAD V1-VREF MSP430 GPIO

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