The 71M6521BE is a highly integrated SoC with an MPU core, flash, and LCD driver. Teridian's Single Converter Technology® with a 22-bit, delta-sigma ADC; four analog inputs; digital temperature compensation; precision voltage reference; battery voltage monitor; and 32-bit computation engine (CE) supports a wide range of residential metering applications with very few low-cost external components. A 32kHz crystal time-base for the entire system further reduces system cost. The IC supports 2-wire single-phase residential metering along with tamper-detection mechanisms. Maximum design flexibility is provided by multiple UARTs, I²C, MICROWIRE™, up to 14 DIO pins, and in-system programmable flash memory, which can be updated with data or application code in operation. A complete array of ICE and development tools, programming libraries, and reference designs enable rapid development and certification of AMR and prepay meters that comply with worldwide electricity metering standards. Applications * Residential Meters, 0.5% Accuracy * < 0.4% Wh Accuracy Over 2000:1 Current Range and Over Temperature * Exceeds IEC 62053/ANSI C12.20 Standards * Voltage Reference < 40ppm/°C * Four Sensor Inputs—VDD Referenced * Low Jitter Wh Test Output (10kHz maximum) * Pulse Count for Wh Pulse Output * Tamper Detection: Neutral Current with CT or Shunt * Three Battery Modes with Wake-Up on Pushbutton or Timer * Brownout Mode (48µA) * LCD Mode (5.7µA) * Sleep Mode (2.9µA) * 8KB Flash with Security