ARM Cortex-M0 50MHz 闪存：64K@x8bit
Overview
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
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## Features
### 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
* 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
