Datasheet

3 A look inside the Davis units
Apart from the custom-made LCD display, the Davis Vantage Pro2 console consists of
commonly available electronics parts. The microcontroller running the entire show is
an Atmel ATmega128L [5] loaded with Davis’ own firmware.
The console unit contains a rear expansion connector which is directly wired to
the ATmega128L MCU. Tracing the individual connectors back to the MCU pinout, as
has already been done and documented thoroughly [10], has revealed some interesting
facts. Figures 4 and 5 refer.
Figure 4: Atmel ATmega128L pinout. Note pins 2-3 (serial data) and 10-13 (SPI).
Figure 5: The Davis Vantage Pro2 rear expansion connector, as described by DeKay [10]. NOTE: Pin
numbers/orientation as seen when looking directly at the exposed connector at the rear of the console.
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