【应用手册】SMBus for GPIO Pin Expansion in MAX II CPLDs

【应用手册】SMBus for GPIO Pin Expansion in MAX II CPLDs
This application note illustrates the capability of Altera® MAX® II CPLDs
to provide general purpose I/O pin expansion via an industry standard
System Management Bus (SMBus).
SMBus for GPIO Pin
Expansion in MAX II CPLDs

December 2007, version 1.0 Application Note 484



Introduction This application note illustrates the capability of Altera MAX II CPLDs
to provide general purpose I/O pin expansion via an industry standard
System Management Bus (SMBus).


SMBus for GPIO To reduce package size and pin count, the number of General Purpose
I/O (GPIO) pins in a microprocessor-based system are limited, but if the
Pin Expansion system has an SMBus interface, this design can