DS80CH10

The Green Energy Manager DS80CH10 is a highly integrated microcontroller that provides several key features for portable systems including key scanning and control, battery and power management, hardware mouse and detached keyboard ports, as well as a 2wire serial I/O port. It incorporates the new Dallas 8051compatible highspeed microcontroller core which has been redesigned to eliminate wasted clock and memory cycles.

Every standard 8051 instruction is executed between 1.5 and 3 times faster than the original for the same crystal speed. Looking at DS80CH10 another way, the high speed core achieves the same throughput as a standard 8051 while using much less power as a result of fewer required clock cycles. As a result, the firmware can easily support many tasks required by mobile systems within a single component.

The controller DS80CH10 is designed to offload battery and power management tasks from the host CPU and thereby make possible an efficient solution for portable systems. 

In addition to the microcontroller core, it incorporates an 8channel, 10bit A/D converter with external reference so that its firmware can perform battery management tasks without burdening the host CPU. A four channel 8bit pulsewidth modulator allows digital control of functions such as LCD contrast and brightness. An 8bit port is provided for key scan inputs. A total of 80 parallel I/O pins are available for key scanning, system configuration, and power management control.

The DS80CH10 Green Energy Manager scans a key matrix and interfaces to the host CPU via an 8042compatible port. As a result, it replaces a keyboard controller chip in a typical portable PC system design. The benefits of sophisticated power management and permanently powered functions are thereby attained without adding to the system's chip count.

A 2wire, bidirectional serial bus is incorporated to facilitate the management of slave peripheral devices on the motherboard, such as digital temperature sensors and potentiometers, and to support external low speed I/O devices such as monitor configuration channels, pen tablets, and joysticks.

Because a direct interface to the Xbus is provided, the controller is not dependent on a particular core logic chip or chip set. Independent chip select inputs for the keyboard controller and power management registers are provided.