Abstract: To produce the 3-wire SPI™ interface required by a MAX7221 display controller (active-low CS, DIN, and CLK), this 1-Wire® network serially addresses three 1-Wire switches (DS2413). The first switch creates Chip Select directly (active-low CS), the second creates the serial-data line directly (DIN), and the third switch—with the help of three exclusive-OR gates—creates the serial clock (CLK). Maxim > Design support > App notes > 1-Wire Devices > APP 4505 Maxim > Design support > App notes > Analog Switches and Multiplexers > APP 4505 Keywords: 1-wire networks, 1-wire switches, SPI peripherals, edge detector, one shot Nov 11, 2010 APPLICATION NOTE 4505 One-Wire Network Controls Remote SPI Peripherals By: Michael Petersen Abstract: To produce the 3-wire SPI interface required by a MAX7221 display controller (active-low CS, DIN, and CLK), this 1- Wire network serially addresses three 1-Wire switches (DS2413). The first switch creates Chip Select directly (active-low CS), the second creates the serial-data line directly (DIN), and the third switch―with the he……