原标题：ST STM8S003F3风扇遥控参考设计

　　ST公司的STM8S003F3/K3系列是提供8KB闪存程序存储器和数据EEPROM的8位微控制器(MCU),工作频率16MHz,采用哈佛架构和三级流水线,具有可靠的I/O,单独看门狗和不同的时钟源以及时钟安全系统.本文介绍了STM8S003F3/K3主要特性,功能框图,以及基于单路TRIAC的风扇速度遥控板STEVAL-IHM037V1主要特性,电路图和材料清单.

　　The STM8S003F3/K3 value line 8-bit microcontrollers offer 8 Kbytes of Flash program memory, plus integrated true data EEPROM. They are referred to as low-density devices in the STM8S microcontroller family reference manual (RM0016).

　　TheSTM8S003F3/K3 value line devices provide the following benefits: performance, robustness and reduced system cost.

　　Device performance and robustness are ensured by true data EEPROM supporting up to 100000 write/erase cycles, advanced core and peripherals made in a state-of-the-art technology at 16 MHz clock frequency, robust I/Os, independent watchdogs with separate clock source, and a clock security system.

　　The system cost is reduced thanks to a high system integration level with internal clock oscillators, watchdog, and brown-out reset.

　　STM8S003F3/K3主要特性:

　　Core

　　16 MHz advanced STM8 core with Harvard architecture and 3-stage pipeline

　　Extended instruction set

　　Memories

　　Program memory: 8 Kbyte Flash memory; data retention 20 years at 55 ℃ after 100 cycles

　　RAM: 1 Kbyte

　　Data memory: 128 bytes true data EEPROM; endurance up to 100 k write/erase cycles

　　Clock, reset and supply management

　　2.95 V to 5.5 V operating voltage

　　Flexible clock control,4master clock sourcesLow-power crystal resonator oscillatorExternal clock inputInternal, user-trimmable 16 MHz RCInternal low-power 128 kHz RC

　　Clock security system with clock monitor

　　Power managementLow-power modes (wait, active-halt, halt)Switch-off peripheral clocks individuallyPermanently active, low-consumption power-on and power-down reset

　　Interrupt management

　　Nested interrupt controller with 32 interrupts

　　Up to 27 external interrupts on 6 vectors

　　Timers

　　Advanced control timer: 16-bit, 4 CAPCOM channels, 3 complementary outputs, dead-time insertion and flexible synchronization

　　16-bit general purpose timers, with 3 CAPCOM channels (IC, OC or PWM)

　　8-bit basic timer with 8-bit prescaler

　　Auto wakeup timer

　　Window and independent watchdog timers

　　Communications interfaces

　　UART with clock output for synchronous operation, SmartCard, IrDA, LIN master mode

　　SPI interface up to 8 Mbit/s

　　I2C interface up to 400 Kbit/s

　　Analog to digital converter (ADC)

　　10-bit ADC, ± 1 LSB ADC with up to 5 multiplexed channels, scan mode and analog watchdog

　　I/Os

　　Up to 28 I/Os on a 32-pin package including 21 high-sink outputs

　　Highly robust I/O design, immune against current injection

　　Development support

　　Embedded single-wire interface module (SWIM) for fast on-chip programming and non-intrusive debugging

　　图1.STM8S003F3/K3功能框图

　　风扇速度遥控板STEVAL-IHM037V1

　　The remote fan speed controller is a single channel TRIAC based solution meant to replacethe existing fan speed controllers and provide the IR remote control feature. It is designed tofit easily inside an enclosure with the dimensions of a single-switch module.A non-isolated capacitive power supply is used to power the microcontroller and the IR sensor. The TSOP38438 IR sensor is used to demodulate the 38 kHz IR signal from the IRtransmitter and decoded by the STM8S003 value line microcontroller to perform the variouscontrol functions. IR communication is based on the RC5 protocol standard. A TRIAC isused as the control element to regulate the power going into the fan by varying its firingangle for different speed settings. The speed settings can be changed by using the onboardtactile switches or by using the IR remote controller.

　　The STM8S003F3 value line 8-bit microcontroller, with its internal data EEPROM, hardwaretimers and external interrupts on GPIOs, makes an efficient implementation of theapplication possible while keeping the size, cost and external component count to aminimum.

　　图2.风扇速度遥控板STEVAL-IHM037V1外形图

　　风扇速度遥控板STEVAL-IHM037V1主要特性:

　　■ Fan speed control using SW1, SW2 keys or IR remote

　　■ Compact and cost effective capacitive power supply

　　■ Example firmware based on RC5 protocol. Can also work with NEC and other IR protocols

　　■ Low cost solution. Can be used for light dimmer applications with software modifications.

　　风扇速度遥控板STEVAL-IHM037V1材料清单: