Push Buttons

The two push buttons on the MCBx51 board are:

• The RESET (S1) push button connects to the reset circuit. This resets the microcontroller.
• INT (S2) connects the INT1 (port 3.3) of the microcontroller when the configuration jumper INT1 (J5) is installed. When the Non-Maskable Interrupt (NMI) jumper is not installed, the INT (S2) button generates an NMI signal to the microcontroller at IC1.