DS28E18 Setup Guide for Remote I 2 C and SPI Sensors Featuring the DS2485 It is well established that the I 2 C and SPI communication protocols are designed to be used in short-distance, intra-board communication. This application note discusses the I 2 C and SPI bus extending capabilities of the DS28E18 1-Wire ® to I 2 C/SPI Bridge with Command Sequencer. Specifically, it covers important measures for setting up a long line, e.g., 100m communication with multiple I 2 C and SPI sensors and the benefits of using this device. Introduction The I 2 C and SPI communication protocols are well known to have short bus distances that range no more than a couple meters. Although solutions currently exist for extending these ranges, they are often complex and expensive. The DS28E18 , however, is a cost-efficient bridge-chip device that demonstrates the benefits of using the 1-Wire interface to get the most range out of complex I 2 C and SPI devices such as environmental sensors,...
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