TM4C123GE6PZ: internal schematic chart of GPIO

Hello Bob,

Staff was recently advised by  'Charles'  that your  '129 family of devices has, 'much restricted, input voltage acceptance!'      Perhaps wise to  repeat  this notification  (here & now)  - should this poster (later) migrate  (from the 'more  input  tolerant'  (123) to the (129)!      (and (then) have to deal w/such 'unanticipated  input restrictions.'      The nature of his question suggests that 'such challenge (may) well be ... in the works...')