STEVAL-IAS003V1

STEVAL-IAS003V1 Counter with STM8L101xx low-power microcontroller and LCD Data brief 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 ) s ( ct u d o r P e t e l o 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. bs STEVAL-IAS003V1 O ) s ( t c u d o r P e The application is focused on low power consumption, so the STM8L101xx MCU is used, and software is written to optimally use the lowpower 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. t e l o s b O 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. September 2009 Doc ID 16223 Rev 1 For further information contact your local STMicroelectronics sales office. 1/4 www.st.com 4 Circuit schematic 1 STEVAL-IAS003V1 Circuit schematic Figure 1. STEVAL-IAS003V1 schematic diagram 5    "UTTON? 0  0" % $ # $0 % $ # $0 % $ # "   # #AP3EMI .# )# 6SS     "UTTON?             % $ # $0 % $ # $0 % $ # " # #AP3EMI .# 6SS ) s ( ct 6SS "UTTON? $0 # $ % 37)        6DD 6DD     (EADER 6SS u d o r P e 0 (EADER s b O " ! & ' " ! & ' ) (s #  N& 0 #/% $ # " ! & ' t e l o         6DD 37)6SS .234     (EADER 0$ 0$ 0$ 0$ 0" 0" 0" 0" 0" 0" 0" 0" 0$ 0$ 0$ 0$ 6SS 0! 0! 0! 0! 0! 0! 633 6$$ 5 34-,                    0# 0# 0# 0# 0# 0# 0# 0! .234 $0 # $ % "UTTON? 0 ! & ' " ! & ' " ! & ' #/-             ,#$?DIGIT 0" t c u d o r P e t e l o s b O 2/4 ! & ' " ! & ' " ! & ' #/- Doc ID 16223 Rev 1 6DD # #AP3EMI N& "4 "ATTERY 6SS !-V STEVAL-IAS003V1 2 Revision history Revision history Table 1. Document revision history Date Revision 10-Sep-2009 1 Changes Initial release. ) s ( ct u d o r P e t e l o ) (s s b O t c u d o r P e t e l o s b O Doc ID 16223 Rev 1 3/4 STEVAL-IAS003V1 ) s ( ct Please Read Carefully: u d o Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. r P e All ST products are sold pursuant to ST’s terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. t e l o No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. 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