Looking at the BMP 280 shuttle board electrical layout, it is very difficult
to read the signals in the provided diagram on page 2 of the BMP 280 Shuttle
Board flyer. For example, it looks like three different pins are labelled
SDI: 5, 16, 17, two different pins are labelled SDO: 4, 15, and two different
pins are labelled SCK: 6 and 18!
Can someone please provide the following information?
(a) Which of the 28 pins are used when using the BMP280 shuttle board via
the I2c interface? A list of the signal names and pin number assignments
would be helpful along with noting the required input pin settings to
indicate use of the I2C interface.
(b) Which of the 28 pins are used when using the BMP280 shuttle board via
the SPI interface? A list of the signal names and pin number assignments
would be helpful along with noting the required input pin settings to
indicate use of the SPI interface.
(c) Why are there multiple pins labelled with the same signal name?