1.1. About the Intelligent Energy Manager

The IEM solution is designed primarily for battery powered equipment, where the requirement to have as long a battery life as possible is paramount. The IEM solution is ideal for portable applications, for example smartphones, feature phones, Personal Digital Assistants (PDA), hand held games consoles and portable media players.

A complete IEM solution is made up of a number of hardware and software components. Figure 1.1 shows a high-level block diagram of a complete IEM solution.

Figure 1.1. Intelligent Energy Manager solution

Intelligent Energy Manager solution

To build an IEM capable SoC, you require three or four on-chip components. These are required in addition to the other blocks in your SoC such as the processor and the peripherals. The additional components are:

The Power Supply Unit (PSU) is the only off-chip component and is described in PSU.

The IEM software is described in IEM software.

Figure 1.2 shows the on-chip IEM components required for a complete solution and how they connect together. This figure does not show the other components that are required for a complete SoC, for example a processor, memory controller, display controller or serial interfaces. Each of the IEM components is described briefly.

Figure 1.2. IEM on-chip components

IEM on-chip components
Copyright © 2003, 2008 ARM Limited. All rights reserved.ARM DDI 0304C
Non-Confidential