The MAX71314/MAX71315 integrate dual 32-bit processors for demanding single-phase metering applications with 256kB flash (MAX71315) or 128kB flash (MAX71314), 12kB RAM, and a single-cycle 32 x 32 + 64 multiplier. The user processor (MPU) is a 32-bit MAXQ®30 core. The metrology compute engine (CE) is a 32-bit processor dedicated to computing the metering parameters from voltage and current samples. The MAXQ® USB-to-JTAG/1-Wire® adapter can be used to interface either the JTAG or 1-Wire port on MAXQ microcontrollers to a PC for development and debugging. Applications * Energy Measurement * Residential Electricity Meters * Four Independent Integrated Metrology Channels Provide High-Accuracy Performance * 0.1% Typical Accuracy Over 5000:1 * Two Remote ADC Interfaces Provide Cost-Effective and Reliable Isolation for Shunts * Dual-Core Architecture Improves System Performance and Allows Application Code Portability * Dedicated 32-Bit DSP Core for High-Rate Metrology Processing * MAXQ30 32-Bit RISC Applications MPU, 10 MIPS (at 10MHz) * Low-Power Consumption Extends Battery Life * 1.75µA Sleep Mode * 100-Pin LQFP Package Offers Optimized Trade-Off Between Board Space and Digital IO Pins * Highly Integrated Product Features and Flexible Peripherals Support Broad Application Needs * 256KB Flash, 12KB SRAM (ZON M3) * 128KB Flash, 12KB SRAM (ZON M3L) * Support Current Transformers, Rogowski Coils, and Shunts * RTC with Temperature Compensation * Digital Temperature Compensation for Metrology * 45Hz to 65Hz Line Frequency Range with the Same Calibration * Phase Compensation (±10°) * Four Pulse Outputs from the Compute Engine (CE) * LCD Controller Supporting Up to Eight Common Planes * Two PWM Relay Control Channels with Programmable Frequency, Duty Cycle, and Ramp Time * Five General-Purpose Timers * Two Touch Switch Inputs * SPI (Master and Slave), Master I2C, 4x UARTs * Two Smart Card Ports * 38kHz IR Encoder/Decoder * Low-Power 5ksps ADC for Environmental Monitoring * On-Chip Digital Temperature Sensor