资料介绍
The MCP41XXX and MCP42XXX family of digital
potentiometers communicate using a standard 3-wire
SPI™ compatible interface. This application note will
cover communication between these devices and the
Motorola 68HC12 family of microcontrollers. Specifi-
cally, the MC68HC912B32 evaluation board was used. M AN757
Interfacing Microchip’s MCP41XXX and MCP42XXX Digital
Potentiometers to Motorola’s 68HC12 Microcontroller
MCP41XXX and MCP42XXX potentiometers are 8-bit
Author: Ezana Haile or 256 tap potentiometers. All 8 bits in the data byte are
Microchip Technology, Inc. wiper data bits.
There are four important bits in the command byte. Bits
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