EM773 Energy metering IC up to 32 kB flash and 8 kB SRAM Rev. 2 3 January 2012 Product data sheet 1. General description The EM773 is an ARM Cortex-M0 based, low-cost 32-bit energy metering IC, designed for 8/16-bit smart metering applications. The EM773 offers programmability and on-chip metrology functionality combined with a low power, simple instruction set and memory addressing with reduced code size compared to existing 8/16-bit architectures. The EM773 operates at CPU frequencies of up to 48 MHz. The peripheral complement of the EM773 includes up to 32 kB of flash memory, up to 2 8 kB of data memory, one Fast-mode Plus I C-bus interface, one RS-485/EIA-485 UART, one SPI interface with SSP features, three general purpose counter/timers, up to 25 general purpose I/O pins, and a metrology engine for energy measurement. 2. Features and benefits System: ARM Cortex-M0 processor, running at frequencies of up to 48 MHz. ARM Cortex-M0 built-in Nested Vectored Interrupt Controller (NVIC). Serial Wire Debug. System tick timer. Memory: 32 kB on-chip flash programming memory. 8 kB SRAM. In-System Programming (ISP) and In-Application Programming (IAP) via on-chip bootloader software. Digital peripherals: Up to 25 General Purpose I/O (GPIO) pins with configurable pull-up/pull-down resistors, and a configurable open-drain mode. GPIO pins can be used as edge and level sensitive interrupt sources. High-current output driver (20 mA) on one pin. 2 High-current sink drivers (20 mA) on two I C-bus pins in Fast-mode Plus. Three general purpose counter/timers with a total of two capture inputs and 10 match outputs. Programmable Windowed WatchDog Timer (WWDT). Analog peripherals: Metrology Engine for Smart Metering with two current inputs and a voltage input.EM773 NXP Semiconductors Energy metering IC Serial interfaces: UART with fractional baud rate generation, internal FIFO, and RS-485 support. One SPI controller with SSP features and with FIFO and multi-protocol capabilities. 2 2 I C-bus interface supporting full I C-bus specification and Fast-mode Plus with a data rate of 1 Mbit/s with multiple address recognition and monitor mode. Clock generation: 12 MHz internal RC oscillator trimmed to 1 % accuracy that can optionally be used as a system clock. Crystal oscillator with an operating range of 1 MHz to 25 MHz. Programmable watchdog oscillator with a frequency range of 7.8 kHz to 1.8 MHz. PLL allows CPU operation up to the maximum CPU rate without the need for a high-frequency crystal. May be run from the system oscillator or the internal RC oscillator. Clock output function with divider that can reflect the system oscillator clock, IRC clock, CPU clock, and the Watchdog clock. Power control: Integrated PMU (Power Management Unit) to minimize power consumption during Sleep, Deep-sleep, and Deep power-down modes. Three reduced power modes: Sleep, Deep-sleep, and Deep power-down. Processor wake-up from Deep-sleep mode via a dedicated start logic using up to 13 of the functional pins. Power-On Reset (POR). Brownout detect with four separate thresholds for interrupt and forced reset. Unique device serial number for identification. Single 3.3 V power supply (1.8 V to 3.6 V). Available as 33-pin HVQFN33 package. 3. Applications Smart Metering EM773 All information provided in this document is subject to legal disclaimers. NXP B.V. 2012. All rights reserved. Product data sheet Rev. 2 3 January 2012 2 of 51