Atmel expands metering platform for advanced smart energy apps

Atmel has expanded its Atmel | SMART portfolio of energy metering products with the recent introduction of the SAM4C32 dual-core secure MCU, along with the SAM4CMS32 and SAM4CMP32 for residential, commercial and industrial metering applications. The new system-on-chip (SoC) solutions have 2MB of cache-enabled dual-bank flash, are pin-pin compatible with existing 512KB and 1MB devices in the portfolio, and allow unparalleled scalability and design-reuse for next-generation smart metering platforms.

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The SAM4Cx series is built on a dual-core 32-bit ARM Cortex-M4 architecture with flexible firmware metrology capability up to a class 0.2 accuracy designed to meet WELMEC requirements for the separation of legal metrology, applications and communications. All devices include advanced security features, low-power real-time clock and LCD driver, and multiple serial interfaces resulting in a best-in-class level of integration, performance and lower bill of material (BOM) cost.

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“As the rate of smart meter deployments continue to rise in several European and Asian regions, our customers demand an unprecedented level of integration and scalability to maximize their R&D investment and to address multiple utility markets more quickly at lower cost points,” explained Kourosh Boutorabi, Atmel’s Senior Director of Smart Metering. “We are committed to offering next-generation smart metering system architects a broad portfolio of solutions based on the same core platform architecture, software and tools.”

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As we’ve previously discussed on Bits & Pieces, the Atmel | SMART SAM4Cx is a comprehensive smart energy platform designed specifically for grid communications, electricity, gas and water metering systems, and energy measurement applications.

Key features of the SAM4CMS32 and SAM4CMP32 include:

  • Application / Master Core
    • ARM Cortex-M4 running at up to 120MHz
    • Memory Protection Unit (MPU)
    • DSP Instruction
    • Thumb®-2 instruction set
    • Instruction and Data Cache Controller with 2 Kbytes Cache Memory
    • 2Mbytes of flash, 256Kbytes of SRAM, 8Kbytes of ROM
  • Coprocessor (provides ability to separate application, communication or metrology functions)
    • ARM Cortex-M4F
    • IEEE 754 Compliant, Single precision Floating-Point Unit (FPU)
    • DSP Instruction
    • Thumb-2 instruction set
    • Instruction and Data Cache Controller with 2 Kbytes Cache Memory
    • 32K+16K bytes of SRAM
  • Symmetrical/Asynchronous Dual Core Architecture
    • Interrupt-based Inter-processor Communication
    • Asynchronous Clocking
    • One Interrupt Controller (NVIC) for each core
    • Each Peripheral IRQs routed to each NVIC Inputs
  • Cryptography
    • High performance AES 128 to 256 with various modes (GCM, CBC, ECB, CFB, CBC-MAC, CTR)
    • TRNG (up to 38 Mbit/s stream, with tested Diehard and FIPS)
    • Public Key Crypto accelerator and associated ROM library for RSA, ECC, DSA, ECDSA
    • Integrity Check Module (ICM) based on Secure Hash Algorithm (SHA1, SHA224, SHA256), DMA assisted
  • Safety
    • Two (ATSAM4CMS32) / one (ATSAM4CMP32) physical Anti-Tamper Detection I/Os with Time Stamping and Immediate Clear of General Backup Registers
    • Security Bit for Device Protection from JTAG Accesses
  • Shared System Controller
    • Embedded Core and LCD Voltage Regulator for single supply operation
    • Power-on-Reset (POR), Brownout Detector (BOD) and Dual Watchdog for safe operation
    • Ultra-low-power Backup mode (< 0.5 µA Typical @ 25°C)
    • Optional 3 to 20 MHz quartz or ceramic resonator oscillators with clock failure detection
    • Ultra-low-power 32.768 kHz crystal oscillator for RTC with frequency monitoring
    • High-precision 4/8/12 MHz factory-trimmed internal RC oscillator with on-the-fly trimming capability
    • One high-frequency PLL up to 240 MHz, one 8 MHz PLL with internal 32 kHz input
    • Low-power slow clock internal RC oscillator as permanent clock
    • Power Supply
    • Clock
    • Ultra-low-power RTC with Gregorian and Persian Calendar, Waveform Generation and Clock Calibration
    • Up to 23 Peripheral DMA (PDC) Channels
  • Shared Peripherals
    • One Segmented LCD Controller
      • Display capacity of 38 segments and 6 common terminals
      • Software-selectable LCD output voltage (Contrast)
      • Can be used in Backup mode
    • Four USARTs (ATSAM4CMS32) or three USARTs (ATSAM4CMP32) with ISO7816, IrDA®, RS-485, SPI and Manchester Mode /
    • Two 2-wire UARTs
    • Up to two 400 kHz Master/Slave and Multi-Master Two-wire Interfaces (I2C compatible)
    • Up to five Serial Peripheral Interfaces (SPI)
    • Two 3-channel 16-bit Timer/Counters with Capture, Waveform, Compare and PWM modes
    • Quadrature Decoder Logic and 2-bit Gray Up/Down Counter for Stepper Motor
    • 3-channel 16-bit Pulse Width Modulator
    • 32-bit Real-time Timer
  • Energy Metering Analog-Front-End Module
    • Works with Atmel’s MCU Metrology library
    • Compliant with Class 0.2 standards (ANSI C12.20-2002 and IEC 62053-22)
    • Four Sigma-Delta ADC measurement channels, 20-bit resolution, 102 dB dynamic range
  • Analog Conversion Block
    • 6-channel, 500 kS/s, Low-power, 10-bit SAR ADC with Digital averager providing 12-bit resolution at 30 kS/s
    • Software Controlled On-chip Reference ranging from 1.6V to 3.4V
    • Temperature Sensor and Backup Battery Voltage Measurement Channel
  • I/O
    • Up to 57 I/O lines (ATSAM4CMS32) or up to 52 I/O lines (ATSAM4CMP32) with External Interrupt Capability (edge or level sensitivity), Schmitt Trigger, Internal Pull-up/pull-down, Debouncing, Glitch Filtering and On-die Series Resistor Termination
  • Package
    • 100-lead LQFP, 14 x 14 mm, pitch 0.5 mm

Learn more about the newest SAM4C32 MCUs here.

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