Method and apparatus for monitoring general purpose input output, GPIO, signals

An apparatus for monitoring general purpose input output, GPIO, signals at GPIO pins of a GPIO port of a system on chip, SoC, said apparatus comprising:

• a first checksum generation unit adapted to generate a first checksum on the basis of GPIO bits stored in GPIO registers of said system on chip, SoC, being connected via corresponding input output, IO, pad circuits to provide analog GPIO signals at the GPIO pins of the GPIO port;
• a second checksum generation unit adapted to generate a second checksum on the basis of the analog GPIO signals at the GPIO pins of the GPIO port representing the GPIO bits;
• and
• a checker logic adapted to compare the first checksum generated by said first checksum generation unit with a second checksum generated by the second checksum generation unit to verify a match between both checksums.