ACKNOWLEDGEMENT MANAGEMENT TECHNIQUE FOR SUPPORTED COMMAND SET OF SMBUS/PMBUS SLAVE APPLICATIONS

摘要

A slave device has an input/output adapted for connection to a serial data line of an I²C bus configuration, a clock input adapted for connection to a serial clock line of the I²C bus configuration, and an interrupt input adapted for connection to the serial clock line of the I²C bus configuration. The slave device senses transitions on the serial clock line through the interrupt input to trigger capturing of a command code on serial data line through the input output. In response to receipt of the command code, the slave device controls the serial data line through the input/output to send an acknowledgement of receipt of the command code. However, if the captured command code is not recognized the slave device inhibits sending of the acknowledgement of the command code. The pull up connection on the serial data line of the I²C bus configuration will, when the slave device is inhibited from acknowledging, produce a high logic state indicative of a no acknowledgement.