IO Expander, PCA9555N
I'm not really sure why I bought this IO expander chip. It was certainly a mistake ordering a chip this wide. The benefits of the chip are the ease of adding a lot of digital IO's with very little overhead. The I2C interface makes putting a lot of these on a board very easy. My first test with this chip can be seen below.
My test code:
created: Dec. 1, 2013, 1:01 a.m.
modified: April 14, 2019, 12:51 a.m.