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AN2288 Datasheet(PDF) 14 Page - STMicroelectronics |
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AN2288 Datasheet(HTML) 14 Page - STMicroelectronics |
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14 / 29 page  Meter hardware AN2288 14/29 Figure 9. Gain switching circuit 4.1.7 EEPROM block After power up, the accumulated kWh data, tampering information and calibration parameters are read by the microcontroller and stored in the form of RAM variables. When the meter is tampered, the tampering information (meter is tampered and tampered channel) will be stored in the EEPROM immediately. When power goes off, the accumulated kWh data will be stored in the EEPROM. + - 3.75V R9 R8 From Analog switch x 2 + - 3.75V R10 R7 From Analog switch x 8 + - 3.75V R11 R14 From Analog switch x32 or x128 C39 Analog input to ADC Analog input to ADC Analog input to ADC Controlled by MCU R12 R13 |
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