ZON M3 Single-Phase Electricity Meter SOC

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