Andrew J Swaneck

US Patent:

20080252505, Oct 16, 2008

Filed:

Jan 22, 2008

Appl. No.:

12/017582

Inventors:

Thomas Youbok Lee - Chandler AZ, US
Jonathan Jackson - Chandler AZ, US
John Austin - Queen Creek AZ, US
Andrew Swaneck - Queen Creek AZ, US
Yann Johner - Preverenges, CH

International Classification:

H03M 1/74

US Classification:

341146

Abstract:

A mixed signal device, e.g., digital-to-analog converter (DAC) device has a serial interface communication protocol that accesses volatile and/or nonvolatile memory and allows a preprogrammed output voltage whenever the mixed signal device is powered-up. However, unlike conventional DAC devices, DAC devices with non-volatile memory may need special interface communication protocols for effective operation of the DAC device 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 device so that the MCU may access the DAC device's memories (non-volatile and/or volatile memories).