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| Overview
The TWR-K20D50MTWR-K20D50M module is a development board for the Kinetis K10 and K20 50MHz 32-bit ARM
The TWR-K20D50MTWR-K20D50M features two pushbutton switches connected to GPIO/interrupt signals, one pushbutton connected to the master reset signal, two capacitive touch pad electrodes, four user‐controllable LEDs, and a potentiometer connected to an ADC input signal.
The TWR-K20D50MTWR-K20D50M Tower MCU Module features MK20DX128VLH5MK20DX128VLH5 — a Kinetis microcontroller with USB 2.0 full‐speed OTG controllers. It is intended for use in the Freescale Tower System but can operate stand‐alone. An on‐board debug circuit, OSJTAG, provides a JTAG interface and a power supply input through a single USB mini‐AB connector.
The Kinetis MCUs start up from an internal digitally controlled oscillator (DCO). Software can enable the main external oscillator (EXTAL0/XTAL0) if desired. The external oscillator/resonator can range from 32.768 KHz up to a 32 MHz. An 8 MHz crystal is the default external source for the MCG oscillator inputs (XTAL/EXTAL). A 32.768 KHz crystal is connected to the RTC oscillator inputs by default.
The touch sensing input (TSI) module of the K20DX128VLH5 MCUs provides capacitive touch sensing detection with high sensitivity and enhanced robustness. Each TSI pin implements the capacitive measurement of an electrode. The TWR-K20D50MTWR-K20D50M provides two methods for evaluating the TSI module. There are two electrodes on‐board. Additionally, 12 TSI signals are connected to a Touch Tower Plug‐in (TWRPI) socket (J5) that can accept Touch TWRPI daughter cards that may feature keypads, rotary dials, sliders, etc.
Key Applications: Barcode scanners, Portable media players, Printers, Programmable logic controllers | |||||||||||
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Development Tools
Software Development Tools:
| Tool Type | Supplier | MPN | Supported Family | Description |
|---|---|---|---|---|
| IDE | Freescale | CodeWarrior | All Freescale MCU's | Freescale's software and development solutions take you beyond the silicon, helping to bring your embedded applications to life. Learn More |
| IDE | ARM Keil | MDK ARM | ARM Cortex -M / Cortex-R4 / ARM7 / ARM9 | The MDK-ARM (Microcontroller Development Kit) is the complete software development environment for ARM7, ARM9, Cortex-M, and Cortex-R4 processor-based devices. Learn More |
| RTOS | Freescale | MQX | ColdFire / HC08 / HC12 / ARM / S08 / RS08 / PowerPC | The Freescale MQX Real-Time Operating System (RTOS) provides real-time performance within a small, configurable footprint. This RTOS is designed to allow you to configure and balance code size with performance requirements. Learn More |
| RTOS | Micrium | uC/OS III | ColdFire / HC08 / HC12 / ARM / S08 / RS08 / PowerPC | μC/OS-III is Micrium’s newest RTOS, designed for developers who need to save time on their current and next embedded sytem projects. Using a commercial real-time kernel such as μC/OS-III provides a solid foundation and framework to the design engineer dealing with the growing complexity of embedded designs. Learn More |
| RTOS | Segger | embOS | ColdFire / HC08 / HC12 / ARM / S08 / RS08 | SEGGER embOS (Real Time Operating System) follows strict, yet efficient coding and documentation standards. embOS is a priority-controlled real time operating system, designed to be used as foundation for the development of embedded real-time applications. Learn More |
Hardware Development Tools:
| Tool Type | Supplier | MPN | Supported Family | Description |
|---|---|---|---|---|
| Debuggers, Emulators & JTAG Tools | Freescale | U-MULTILINKU-MULTILINK | HC08 / HCS12 / S08 / RS08 / Coldfire / Kinetis | P&E USB Multilink Universal debug and programming interface for HCS08, HC(S)12(X), ColdFire, Qorivva MPC55xx/56xx, and Kinetis |
| Debuggers, Emulators & JTAG Tools | ARM | ULINK2ULINK2 | ARM Cortex-M / ARM7 / ARM9 | USB DEBUG |
| Debuggers, Emulators & JTAG Tools | ARM | ULINKProULINKPro | ARM Cortex-M / ARM7 / ARM9 | High-Speed Debug and Trace Unit |
| Emulator | Segger | J-LinkJ-Link | ARM Cortex-M / Cortex-R4 / Cortex-A / ARM7 / ARM9 | JTAG/SWD Emulator with USB interface |
| Programmer | Segger | Flasher ARMFlasher ARM | ARM Cortex-M / Cortex-R4 / Cortex-A / ARM7 / ARM9 | Flash Programmer for ARM and Cortex cores |
Technical Documents
Learning Center
Design Elements
| Type | Description |
|---|---|
| Application Library | Freescale: Software Code for TWR-K20D50M Labs and Code Examples |
Video
| Video1 | Video2 |
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Kit Features
- Tower compatible microcontroller module
- MK20DX128VLH5MK20DX128VLH5 MCU (50 MHz, 128KB Flash, 16 KB RAM, 32 KB FlexNVM, Low power, 64LQFP package)
- Dual role USB interface with Micro‐AB USB connector
- Tower Plug-In (TWRPI) socket for sensor and touch boards expansion (keypads, rotary dials, sliders)
- Tower connectivity for access to UART, SPI, I²C
- On‐board debug circuit MC9S08JM60 open source JTAG (OSJTAG) with virtual serial port
- Three axis accelerometer (MMA8451QMMA8451Q)
- Four (4) user‐controllable LEDs
- Two (2) capacitive touch pads
- Two (2) user pushbutton switch
- Infrared transmit and receive
- Potentiometer
- Microphone (ADC)
- Buzzer
- Battery backup for RTC
- Tools
- Freescale’s CodeWarrior Development Studio for Microcontrollers v10.1 (CW-MCU10)
- IAR EWARM V6.30
Kit Contents
The Freescale TWR-K20D50MTWR-K20D50M Module supplied with below contents:
- TWR-K20D50MTWR-K20D50M 32-bit MCU module with MK20DX128VLH5MK20DX128VLH5 MCU (64 LQFP)
- 3ft A to mini‐B USB cable for debug interface and power
- 3ft A to micro‐B USB cable for MK20DX128VLH5 USB interface
- Micro‐B to A adapter for MK20DX128VLH5 USB Host applications
- Quick Start Guide
- Battery
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