原标题：Freescale Kinetis KL03 CSP MCU开发方案

　　freescale公司的Kinetis KL03芯片尺寸封装(CSP) MCU是业界最小的基于ARM Cortex-M0+的MCU,尺寸为1.6x2.0mm,能节省PCB面积35%,而比同类产品GPIO多60%,工作频率48MHz,多达32KB闪存,2KB SRAM和8 KB ROM,主要用在消费电子的遥控,智能监视器,智能手表,运动穿戴电子以及无线传感器网络.本文介绍了Kinetis KL03主要特性, 功能框图以及评估板FRDM-KL03Z主要特性,电路图和材料清单.

　　The Kinetis KL03 chip-scale package (CSP) MCU is the next world’s smallest ARM Powered® MCU designed to support the latest innovation in smart, small devices. Available in the ultra-small 1.6 x 2.0 mm² wafer-level CSP, the Kinetis KL03 CSP (MKL03Z32CAF4R) reduces even more board space while integrating even more rich MCU features than previously seen in the market. The Kinetis KL03 CSP MCU consumes 35 percent less PCB area, yet delivers 60 percent more GPIO than the nearest competing MCU. The Kinetis KL03 family joins the Freescale Kinetis mini MCU portfolio, allowing designers to dramatically reduce their board size without compromising the performance, feature integration and power consumption of their end products.

　　Supports ultra low power 48 MHz devices with up to 32 KB Flash.World’s smallest MCU based on ARMR technology. Ideal solution for Internet of Things edge nodes design with ultra small form factor and ultra low power consumption. The products offers:

　　• Tiny footprint packages, including 1.6 x 2.0 mm2 WLCSP

　　• Run power consumption as low as 50 μA/MHz

　　• Static power consumption as low as 2.2 μA with 7.5 μs wakeup time for full retention and lowest static mode down to 77 nA in deep sleep

　　• Highly integrated peripherals, including new boot ROM and high accurate internal voltage reference, etc

　　Kinetis KL03主要特性:

　　Core

　　• ARMR CortexR-M0+ core up to 48 MHz Memories

　　• Up to 32 KB program flash memory

　　• 2 KB SRAM

　　• 8 KB ROM with build-in bootloader

　　• 16 bytes regfile

　　System peripherals

　　• Nine low-power modes to provide power optimization based on application requirements

　　• COP Software watchdog

　　• Low-leakage wakeup unit

　　• SWD debug interface and Micro Trace Buffer

　　• Bit Manipulation Engine

　　Clocks

　　• 48 MHz high accuracy internal reference clock

　　• 8/2 MHz low power internal reference clock

　　• 32 kHz to 40 kHz crystal oscillator

　　• 1 kHz LPO clock

　　Operating Characteristics

　　• Voltage range: 1.71 to 3.6 V

　　• Flash write voltage range: 1.71 to 3.6 V

　　• Temperature range (ambient): -40 to 105℃ for QFN packages; -40 to 85℃ for WLCSP packages Human-machine interface

　　• General-purpose input/output up to 22 Communication interfaces

　　• One 8-bit SPI module

　　• One LPUART module

　　• One I2C module supporting up to 1 Mbit/s, with double buffer Analog Modules

　　• 12-bit SAR ADC with internal voltage reference, up to 818 ksps and 7 channels

　　• High-speed analog comparator containing a 6-bit DAC and programmable reference input

　　• 1.2 V voltage reference (Vref)

　　Timers

　　• Two 2-channel Timer/PWM modules

　　• One low-power timer

　　• Real time clock

　　Security and integrity modules

　　• 80-bit unique identification number per chip

　　Kinetis KL03目标应用:

　　Consumer

　　Remote Controls

　　Smart Monitors

　　Smart Watches

　　Sports and activity wearables

　　Industrial

　　Wireless Sensor Nodes

　　图1. Kinetis KL03系列功能框图

　　Kinetis KL03评估板FRDM-KL03Z

　　FRDM-KL03Z: Freescale Freedom Development Platform for Kinetis KL03 MCUs

　　The Freescale Freedom development platform is an evaluation and development tool ideal for rapid prototyping of microcontroller-based applications. The hardware design is form-factor compatible with popular third-party hardware designed to work with Arduino™ and Arduino-compatible boards.

　　The Freescale KL03Z freedom board (FRDM-KL03Z) is a simple, yet sophisticated design featuring a Kinetis L Series microcontroller KL03Z, a 3.3 V microcontroller built on the ARM® Cortex™-M0+ core.

　　The Kinetis L series is the most scalable portfolio of low-power, high-robustness, mixed signal 32-bit ARM Cortex-M0+ MCUs running up to 48 MHz in the industry. It supports power supply voltage range from 1.71 V to 3.6 V, ambient operating temperature ranges from –40C to 105C and includes up to 64 KB flash.

　　The FRDM-KL03Z includes the Freescale open standard embedded serial and debug adapter known as OpenSDA.

　　This circuit offers the user several options for serial communications, flash programming, and run-control debugging.

　　There are also many software development tool options available to the user. Choices include Kinetis Design Studio (KDS), IAR Embedded Workbench, Keil MDK featuring the μVision IDE, etc.All of these features combine to give the user the freedoms needed to rapidly prototype many embedded designs: a powerful microcontroller built on a very low-power core and SoC platform, easy-access to I/O with a large ecosystem of compatible hardware, a flexible programming and debug interface, and a large ecosystem of software development environments. Freedom!

　　图2. 评估板FRDM-KL03Z外形图

　　评估板FRDM-KL03Z主要特性:

　　The FRDM-KL03Z hardware is a Freescale Freedom development platform microcontroller board assembled with the following features:

　　• Kinetis L Series KL03 family MCU MKL03Z32VFK4 in a 24 QFN package

　　• On-board serial and debug adapter (OpenSDA)

　　• I/O headers for easy access to MCU I/O pins

　　• Freescale inertial sensor MMA8451Q

　　• Capacitive touch slider

　　• Reset push button

　　• RGB LED

　　• Infrared communication

　　• Motor control header for simple BLDC motor control on APMOTOR56F8000E

　　图3. 评估板FRDM-KL03Z框图

　　The FRDM-KL03Z features two microcontrollers (MCUs): the target MCU and a serial and debug adapter (OpenSDA) MCU. The target MCU is a Kinetis L Series KL03 family device, the KL03Z32VFK4. The OpenSDA MCU is a Kinetis K Series K20 family device, the K20DX128VFM5.

　　评估板FRDM-KL03Z主要特性:

　　• 32-bit ARM Cortex-M0+ core

　　— Up to 48 MHz operation

　　— Single-cycle fast I/O access port

　　• Memories

　　— 32 KB flash

　　— 2 KB SRAM

　　— 8 KB ROM with build-in bootloader

　　— 16-byte regfile

　　• System integration

　　— Nine low-power modes to provide power optimization based on application requirements

　　— COP Software watchdog

　　— Low-leakage wakeup unit

　　— SWD debug interface and Micro Trace Buffer

　　— Bit manipulation engine (BME) for read-modify-write peripheral operations

　　• Clocks

　　— 48 MHz high accuracy internal reference clock

　　— 8/2 MHz low power internal reference clock

　　— 32 kHz to 40 kHz crystal oscillator

　　— 1 kHz LPO clock

　　• Analog peripherals

　　— 12-bit SAR ADC with internal voltage reference, up to 7 channels

　　— High-speed analog comparator containing a 6-bit DAC and programmable reference input

　　— 1.2 V voltage reference (Vref)

　　• Communication peripherals

　　— one 8-bit Serial Peripheral Interface (SPI)

　　— one I2C module

　　— one UART module

　　• Timers

　　— two 2-channel Timer/PWM modules

　　— one Low-Power Timer (LPTMR)

　　— Real time clock (RTC)

　　— System tick timer

　　— One watchdog module

　　• Security

　　— 80-bit unique identification number per chip

　　• Human-Machine Interfaces (HMI)

　　— General purpose input/output up to 22

　　— GPIO interrupt

　　— external input pin for LLWU in LLS and VLLSx mode

　　Kit Contains

　　FRDM-KL03Z hardware

　　Quick Reference Card

　　Additional hardware required: USB A-to-MiniB cable (not included)