71M6545H

71M6545/71M6545H Metrology Processors GENERAL DESCRIPTION The 71M6545/71M6545H metrology processors are based on 4th-generation metering architecture supporting the 71M6xxx series of isolated current sensing products that offer drastic reduction in component count, immunity to magnetic tampering, and unparalleled reliability. The 71M6545/71M6545H integrate our Single Converter Technology® with a 22-bit delta-sigma ADC, a customizable 32-bit computation engine (CE) for core metrology functions, as well as a user-programmable 8051compatible application processor (MPU) core with up to 64KB flash and up to 5KB RAM. An external host processor can access metrology functions directly through the SPI™ interface, or alternatively through the embedded MPU core in applications requiring metrology data capture, storage, and preprocessing within the metrology subsystem. In addition, the devices integrate an RTC, DIO, and UART. A complete array of ICE and development tools, programming libraries, and reference designs enable rapid development and certification of meters that meet all ANSI and IEC electricity metering standards worldwide. C Shunt Resistor Sensors NEUTRAL B A LOAD Resistor Dividers 71M6xx3 71M6xx3 71M6xx3 HOST POWER SUPPLY This system is referenced to Neutral NEUTRAL Pulse Transformers C B A SPI_CKI SPI_DI SPI_DO SPI_CSZ XFER_BUSY SAG MUX and ADC IADC0 IADC1 } IN* VADC10 (VC) IADC6 IADC7 } IC VADC9 (VB) IADC4 IADC5 } IB VADC8(VA) IADC2 IADC3 } IA V3P3A...