Freescale Semiconductor TWR-K20D72M User guide
TWR-K20D72M
User Manual
Rev. 1.1
Freescale Semiconductor Inc.
Contents
1 TWR-K20D72M Overview ...................................................................................................................... 4
1.1 Features .................................................................................................................................................................................. 4
1.2 Getting started ..................................................................................................................................................................... 5
1.3 Reference Documents ....................................................................................................................................................... 5
2 Hardware Description ............................................................................................................................. 5
2.1 K20D72M Microcontroller .............................................................................................................................................. 6
2.2 Clocking .................................................................................................................................................................................. 7
2.3 System Power ....................................................................................................................................................................... 7
2.3.1 Board Power Select ........................................................................................................................................................................... 7
2.3.2 RTC VBAT .............................................................................................................................................................................................. 7
2.4 Debug Interface ................................................................................................................................................................... 8
2.4.1 OSJTAG .................................................................................................................................................................................................... 8
2.4.2 Cortex Debug Connector ................................................................................................................................................................. 8
2.5 USB Interface ........................................................................................................................................................................ 9
2.6 Infrared Port ......................................................................................................................................................................... 9
2.7 External Bus Interface – FlexBus.................................................................................................................................. 9
2.8 Accelerometer ...................................................................................................................................................................... 9
2.9 Potentiometer, Pushbuttons, LEDs ............................................................................................................................. 9
2.10 General Purpose Tower Plug-in (TWRPI) Socket ............................................................................................ 10
2.11 Touch Interface .............................................................................................................................................................. 10
2.12 Microphone and buzzer .............................................................................................................................................. 11
3 Jumper Table ........................................................................................................................................... 12
4 Input/Output Connectors and Pin Usage Table........................................................................... 13
5 Elevator Connections ............................................................................................................................ 15
TWR-K20D72M User’s Manual Page 2 of 17
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