Hi Hui Shao,
The TWR-K20D50M contains K20DX128 in 64 LQFP (K20DX128VLH5), you can find the data sheet in this link: http://cache.freescale.com/files/32bit/doc/data_sheet/K20P64M50SF0.pdf?fasp=1&WT_TYPE=Data%20Sheets&...
And the reference manual in the following link:
http://cache.freescale.com/files/32bit/doc/ref_manual/K20P64M50SF0RM.pdf?fr=gdc
I hope this helps, have a nice day!
Have a great day,
Sol
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------