Описание
Kinetis KM3x MCUs enable single-chip one-, two-, and three-phase electricity meters, as well as flow meters and other precision measurement applications. Provides security with active and passive tamper detection with time stamping Supports high-precision internal voltage reference with low temperature drift Features a comprehensive enablement suite including reference designs
MCU
- High-performance ARM Cortex-M0 core, up to 75 MHz of core clock frequency
- 256 KB/128 KB/64 KB single array flash
- Supports v6-M Instruction Set Architecture (ISA) including all 16-bit v7-M instructions plus a number of 32-bit thumb-2 instructions
- PLL to generate clocks for AFE
- Input range: 31.25 kHz to 39.0625 kHz
- Output range: 11.72 MHz to 14.65 MHz
- FLL to generate core, system and flash clocks
- Input range: 31.25 kHz to 39.0625 kHz
- Output Range: 20 MHz to 50 MHz
- Flexible modes of operation
- Two internal trim-able clock references
- 32 kHz
- 4 MHz
Analog Front End
- 24-bit sigma delta ADC with 94 dB SNR
- Programmable gain amplifier with gains from 1 to 32 with low temperature drift
- High precision internal voltage reference with low temperature drift
Security
- Tamper detection with time stamping
- Random number generator, memory protection unit
- Memory Mapped Cryptographic Acceleration Unit (MMCAU) for AES Encryption
- Cyclic Redundancy Check (CRC)
Interfaces
- LCD segment driver up to 448 (56×8)
- High accuracy RTC +5 ppm over temperature range
- 5x UART, 2x SPI, 2x IIC
Operating Voltage and Temperature Range
- Voltage range 1.71 volts – 3.6 volts (without AFE)
- Voltage range 2.7 volts- 3.6 volts(with AFE)
- Temperature range -40°C to 105°C
