Описание
Enabling high accuracy, secure 1-, 2- & 3-phase electricity metering solutions through a powerful analog front end (AFE), auto-compensated iRTC with hardware tamper detection, segment LCD controller, rich security protection and multiple low power features in a 32-bit ARM Cortex -M0+ MCU. This product offers: • Enabling single-chip 1-, 2- & 3-phase metering designs • AFE, Security & HMI. Single crystal implementation • Single point of calibration during manufacture • Highest accuracy metrology with regional feature support • Multiple ?? ADCs with PGA • Supports neutral disconnect use case • Compliance with WELMEC/OIML recommendations • Memory & peripheral protection • Hardware tamper detect with time stamping • Low-power RTC, battery backup with tamper memory
- Core
- ARM® Cortex®-M0+ core up to 75 MHz
- Metering specific Memory Mapped Arithmetic Unit(MMAU)
- Clocks
- 75 MHz high-accuracy internal reference clock
- 32 kHz, and 4 MHz internal reference clock
- 1 kHz LPO clock
- 32.768 kHz crystal oscillator in iRTC power domain
- 1 MHz to 32 MHz crystal oscillator
- FLL and PLL
- System peripherals
- Memory Protection Unit (MPU)
- 4-channel DMA controller
- Watchdog and EWM
- Low-leakage Wakeup Unit (LLWU)
- SWD debug interface and Micro Trace Buffer (MTB)
- Bit Manipulation Engine (BME)
- Inter-peripheral Crossbar Switch (XBAR)
- Analog Modules
- 4 AFE channels (4× 24-bit ?? ADCs with PGA)
- 16-channel 16-bit SAR ADC with 4 result registers
- High-speed analog comparator containing a 6-bit DAC and programmable reference input
- Internal 1.2 V reference voltage 10–15 ppm/?
- Timers
- Quad Timer (QTMR)
- Periodic Interrupt Timer (PIT)
- Low Power Timer (LPTMR)
- Programmable Delay Block (PDB)
- Independent Real Time Clock (iRTC)
- Human-machine interface
- Up to 4×60 (8×56, 6×58) segment LCD controller operating in all low-power modes
- General purpose input/output (GPIO)
- Memories
- 256 KB program flash memory
- 32 KB SRAM
- Operating Characteristics
- Voltage range: 1.71 to 3.6 V (without AFE)
- Voltage range: 2.7 to 3.6 V (with AFE)
- Temperature range (ambient): –40 to 105 °C
- Low power features
- 13 power modes to provide power optimization based on application requirements
- 7.69 mA @ 75 MHz run current
- Less than 171 µA/MHz very low power run current
- 6.05 µA very low power stop current
- Down to 220 nA deep sleep current
- VBAT domain current < 1 µA with iRTC operational
- Low-power boot with less than 2.33 mA peak current
- Communication interfaces
- 16-bit SPI modules
- Low-power UART module
- UART module complying with ISO7816-3
- Basic UART module
- I²C with SMBus
- Security and integrity modules
- Memory Mapped Cryptographic Acceleration Unit (MMCAU) for AES encryption
- Random Number Generator (RNGA), complying with NIST: SP800-90
- Programmable Cyclic Redundancy Check (PCRC)
- 80-bit unique identification number per chip
