资料介绍
The MCP41XXX and MCP42XXX family of digital
potentiometers allow for daisy chaining of multiple
devices on a single SPI™ bus. It is possible to commu-
nicate to multiple devices using one 3-wire data bus
(CS , CLK and DATA), by connecting the SO pin on one
device to the SI pin of the next device in the chain. This
application note details one example of source code
that is used to communicate with eight daisy chained
devices.M AN747
Communicating with Daisy Chained MCP42XXX
Digital Potentiometers
COMMUNICATION
Authors: Craig L. King & Ezana Haile
Microchip Technology Inc. Daisy chaining allows multiple devices to share the
same clock and chip select line, freeing I/O pins on the
microcontroller. Figure 1 shows connections for three
OVERVIEW
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