October 2009

Doc ID 16031 Rev 1

1/28

UM0756

User manual

STEVAL-ICB003V1 front panel demonstration board

based on the STLED316S and the STMPE1208S

Introduction

This document explains the functioning of the STEVAL-ICB003V1 demonstration board,

which represents a general purpose front panel solution utilizing an STLED316S LED driver,

STMPE1208S capacitive touch sensor and an STM8 series microcontroller (STM8S207K6).

The basic idea is to develop a generic front panel for white goods in general. Some features

such as quadrature rotary encoder interface, power management feature and a logic level

input for water level sensor have also been provided to increase versatility.

The objective of this demonstration board is to display the capabilities of STLED316S and

STMPE1208S for a sophisticated front panel to address the market segment of front panels

for DVD players, DVD recorders, set-top boxes, washing machines and many more, while

keeping system cost as low as possible. The system design focuses on 3 key areas -

standby management for low power consumption, general touch key as well as rotary

encoder input and a water level sensing which accepts a 38 - 43 kHz output from a water

level sensor.

All user I/O is handled by the STLED316S inputs only, with little MCU overhead. For

example, rotary encoder, buzzer and water level sensor inputs are handled by the

STLED316S only, without consuming MCU resources.

In the sections that follow, the operation of the system is explained. Once the board is

connected to the power supply, the system is ready to perform operations.

Figure 1.

STEVAL-ICB003V1 front panel demonstration board

www.st.com