Hi Eric,
The 9S12XET256 is part of the S12XE family.
http://www.nxp.com/products/automotive-products/microcontrollers-and-processors/16-bit-s12-s12x-mcus...
The datasheet:
http://www.nxp.com/files/microcontrollers/doc/data_sheet/MC9S12XEP100RMV1.pdf
BTW: The “T” in part number just follows the number of available CANs – here it is 3 CAN modules. E.g. S12XEP100 have 5 CANs.
I hope it helps you.
Have a great day,
Radek
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