READ AND WRITE INTERFACE COMMUNICATIONS PROTOCOL FOR DIGITAL-TO-ANALOG SIGNAL CONVERTER WITH NON-VOLATILE MEMORY

摘要

A mixed signal integrated circuit device, e.g., digital-to-analog converter (DAC), has a serial interface communication protocol that accesses volatile and/or non-volatile memory and allows a preprogrammed output voltage whenever the mixed signal device is powered- up. However, unlike conventional DACs, DACs with non- volatile memory may need special interface communication protocols for effective operation of the DAC and communications between a system master controller unit (MCU). Interface communications protocols that do not violate standard serial bus communications protocols are provided for communicating between the volatile and non- volatile memories of the DAC so that the MCU may access the DACs memories (non-volatile and/or volatile memories). The mixed signal integrated circuit device has a user programmable address.