UM0460 Datasheet, PDF (1/23 Pages) STMicroelectronics – Set-top box front panel evaluation board based on

UM0460
User manual
Set-top box front panel evaluation board based on
the STLED316S
Introduction
This document explains the operation of the front panel evaluation board based on the
STLED316S that consists of the LED driver/controller STLED316S and microcontroller
ST7LITE39F2 as SPI master. The basic idea is to develop a front panel for set-top boxes
which is very close to the available solutions on the market.
The objective of this evaluation board is to display the capabilities of ST's LED
controller/driver STLED316S to fit the market segment of front panels for HTiB (Home
Theater in a Box), set-top boxes and other applications that require a compact, integrated
solution, keeping the system cost as low as possible.
The system can be operated using the various front panel keys provided on the system.
In the sections that follow the operation of the system is explained. When the board is
connected to the power supply, the system gets ready to perform any operation.
At the time of manufacturing an additional board has been connected to allow in-circuit
programming of the microcontroller. The two can be easily broken apart so that the front
panel board can be used independently.
To summarize, the key features of the evaluation board are:
■ 8-segment, 6-digit customized LED display
■ 8-segment bar graph LED display
■ 7 front panel keys
■ 2 LEDs (green for power and red for interrupt)
■ 1 potentiometer for adjusting the brightness of the display
■ 1 RESET switch to reset the whole system
■ DEMO mode for making the system self-performing and user independent
■ Embedded in-circuit programming capability
January 2008
Rev 1
1/23
www.st.com