Freescale Semiconductor, Inc
FRDM-K20D50MUM
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Note that J6 is not-populated by default. A Samtec FTSH-105-02-F-D or compatible connector can be added to
the J6 through-hole connector. A mating cable, such as a Samtec FFSD IDC cable, can then be used to connect
from the OpenSDA of the FRDM-K20D50M to an off-board SWD connector.
Virtual Serial Port
A serial port connection is available between the OpenSDA MCU and pins PTA1 and PTA2 of the K20. Several of
the default OpenSDA Applications provided by Freescale, including the MSD Flash Programmer and the P&E
Debug Application, provide a USB Communications Device Class (CDC) interface that bridges serial
communications between the USB host and this serial interface on the K20.
5.3 K20D50M Microcontroller
The target microcontroller of the FRDM-K20D50M is the MK20DX128VLH5, this is 50 MHz entry-level K20 USB
microcontrollers (MCUs) are the lowest power Kinetis ARM® Cortex™-M4 devices with high feature integration
in a small form factor, making them ideal for space- and cost-constrained applications. These MCUs offer 32 KB
to 128 KB of flash memory and optional 32 KB of FlexNVM in 32-pin QFN (5 mm x 5 mm) to 64-pin LQFP
packages. Peripheral options include full-speed USB Device/Host/On-The-Go with device charge detect
capability, a 16-bit analog-to-digital converter (ADC), low-power touch-sensing interface and several general
timing, communication and control peripherals.