Tool used: Mini CN900 Key Programmer
Vehicle model: Mazda 3
Step 1.
Start CN900 Mini
Insert the original transponder key into the slot
Press ‘READ©’ button on the menu.
CN900 Mini key programmer will automatically read out the key code and the key type is 63.
Notice: Don’t move the key away
Step 2.
Press the ‘DECODE’ button (Do not move the key)
Waiting… decoded successfully.
Step 3.
Remove the original key and put the new 4D63 chip into the upper small slot and press the “COPY” button.
Verify Data and then “success”.
Done! Mini CN900 copy 4D63 chip for Mazda 3 successfully only in 3 steps!
http://www.key-programmer.org/2016/12/15/copy-mazda-4d63-chip-via-cn900-mini/