Data brief
For further information contact your local STMicroelectronics sales office.
September 2009 Doc ID 16223 Rev 1 1/4
4
STEVAL-IAS003V1
Counter with STM8L101xx
low-power microcontroller and LCD
Features
■ 1.6 µA consumption @ 18 Hz refresh rate
■ 3 digit LCD glass driven by software
■ 2 buttons
■ CR1220 battery operated
■ Minimum external components:
– only 2 capacitors on top of mandatory parts
(battery, LCD, MCU, buttons)
■ Low-cost PCB (single layer)
■ RoHS compliant
Description
The STEVAL-IAS003V1 counter demonstration
board is intended as an example for applications
where a directly-driven LCD with the associated
programmable functionality is needed. Targeted
areas include the medical and healthcare field,
battery-operated counters, meters and many
others.
The application is focused on low power
consumption, so the STM8L101xx MCU is used,
and software is written to optimally use the low-
power modes available. This results in an average
current consumption for the entire application of
below 1.5 µA, including direct LCD drive,
implemented by software.
Very low consumption is achieved by keeping the
microcontroller in the active-halt low-power mode
for most of the time. From this mode, the
STM8L101xx is awakened regularly by the auto
wake-up timer.
STEVAL-IAS003V1
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