MCU Implements Low-Cost LED Control

The MC9RS08KA2 MCU can be used to implement low-cost control of high-brightness LEDs. The block diagram (right) highlights how it can be implemented to control a high-brightness LED with a 350mA current and up to 80% accuracy.

Freescale’s MC9RS08KA2 MCU series is an extremely low-cost, low pin-count device. The MC9RS08KA2 integrates all active functions required to directly implement a step-down converter for LED driving with a minimum number of external components.

The MC9RS08KA2 also features an analogue comparator, which can be used to determine LED current.

An inverting input and non-inverting input are used, respectively, as current-sense feedback and reference-voltage inputs.

The complete hardware and software solution for this specific implementation is offered by Freescale. It is a complete development platform with a USB-to-BDM interface and source code for developers.

 

FEATURES Simplified S08 instruction set with additional high-performance instructions 2048bytes of on-chip Flash EEPROM Power-saving modes 6- and 8-pin packages RS08 CPU core 8-bit modulo timer Analogue comparator

APPLICATIONS High-brightness LED control Various low-cost MCU applications

 

 

 

The DEMO9RS08KA2 is available to members of the Future Board Club. To apply for the development board, and membership of the Board Club, go to www.my-boardclub.com/manf-offers.htm This offer is free and subject to qualification.

 

Freescale / MC9RS08KA2