1 Introduction

In some applications, an embedded controller (EC) is required to interact with the PD controller during the application run time (APP mode) or potentially there is an EC in the system performing house-keeping activities. To reduce cost, the EEPROM can be removed and the function of storing and updating the PD with the binary image can be moved to the EC. This application note focuses on using an EC to load an image and move the PD controller from PTCH mode to APP mode with four character code (4CC) commands. Before discussing the EC, a brief description of the dead battery configuration is provided in the context of an application without an EEPROM.