The RESET push button connects grounds the active-low
external reset pin of the microcontroller and is connected to the
power-up reset circuit. This resets the microcontroller.
The ISP push button grounds P2_7 pin on the
microcontroller. Holding down this button during a reset enables
ISP flashing via the boot source configured using the Boot Configuration Jumpers.
The P4_0, P4_3 and P4_4 push buttons
connects to port pins P4_0, P4_3 and P4_4 of the LPC1850 device and
are available for general use.
The WAKEUP0 push button connects to pin W_UP0 of
the microcontroller. This wakes up the microcontroller out of sleep
mode.
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