SY7T231H

•  Powerful 32-bit ARM Cortex M0 core, up to 10MHz clock
• 256KB of Flash memory with copy/debug protection
• 24KB RAM plus 4KB NV-RAM
• Dedicated 64-bit 20MHz Compute Engine (CE) core
• Optimized CE code image provided by Silergy, suitable for most metering applications and adaptable to specific applications
• Compatible with capacitively coupled isolated remote sensors (SY7M007)
• 3.0V to 3.6V supply in Mission Mode
• 1µA current draw in Sleep Mode
• Brownout Mode including analog features functional with 2.5V VBAT supply
• On-chip digital temperature sensor (±1°C)
• Configurable ADC sampling rate, up to 8kHz
• On-chip RTC with temperature-compensated 1-second pulse output
• ±0.1% Wh accuracy over 5,000:1 current range in CT mode
• Multiple wake sources for anti-tamper:

- Wake on timer

- Wake on edge at GPIO pins (4 GPIO wake pins)

- Wake on UART receive signal (RX0, RX1)

- Wake on voltage comparator event and reset

• Single 32kHz crystal provides all operating clocks
• Internal R/C backup oscillator
• SY7M212H: Up to 64 LCD segment pins, up to 8 commons, 6 pages
• SY7M212H: Up to 73 GPIO pins, all are interrupt-capable
• Two master SPI ports, one slave SPI port
• One independent I2C port, one I2C port shared with SPI pins
• Six UARTs
• Four PWM outputs, up to 2.5MHz, programmable duty cycle
• Two pulse generator outputs with programmable frequency and duty cycle for the optional supply of capacitively coupled isolated remote sensor ICs (SY7M007) via a transformer

The SY7M212H and SY7T231H are versatile electricity metering SoCs for single-phase and dual-phase electricity meters and power monitoring systems, featuring Silergy’s proprietary Teridian power measurement technology.

The parts contain two dedicated ADCs for current measurement and one multiplexed ADC for phase voltages. CTs or Rogowski coils can be used as current sensors, and shunts can be connected using up to two SY7M007 capacitively coupled remote interface ICs.

An embedded 64-bit Compute Engine (CE) operating at 20MHz performs computations, data formatting, and reporting of metrology parameters to the Cortex M0 core, which operates at 10MHz. With 256KB integrated flash memory for storing code, nonvolatile calibration coefficients and device configuration settings, the parts offer an autonomous metrology solution and can interface to a host processor through its SPI, UART, or I2C ports.

The SY7M212H is available in a 100-pin LQFP package. The SY7T231H is available in a 68-pin QFN package.