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ST公司的STM8S105xx是8位MCU,提供16-32KB閃存程序存儲器和數據EEPROM,讀/寫次數高達300k,具有降低系統成本的優勢,CPU工作頻率16MHz,工作電壓2.95V-5.5V. ST公司的STEVAL-IFN004V1評估板是采用L6230和STM8的六步進馬達驅動器,DC電壓從8V到48V,沒個輸出最大負載電流1.4 Ar.m.s(峰值2.8A),集成了5V DC/DC穩壓器,適用于冷卻風扇和泵.本文介紹了STM8S105xx主要優勢和特性,方框圖, STEVAL-IFN004V1評估板主要特性,電路圖和材料清單與PCB布局圖. The STM8S105xx access line 8-bit microcontrollers offer from 16 to 32 Kbytes Flash program memory, plus integrated true data EEPROM. They are referred to as medium-density devices in the STM8S microcontroller family reference manual (RM0016). STM8S105xx主要優勢: All devices of the STM8S105xx access line provide the following benefits: • Reduced system cost - Integrated true data EEPROM for up to 300 k write/erase cycles - High system integration level with internal clock oscillators, watchdog and brown-out reset. • Performance and robustness - 16 MHz CPU clock frequency - Robust I/O, independent watchdogs with separate clock source - Clock security system • Short development cycles - Applications scalability across a common family product architecture with compatible pinout, memory map and and modular peripherals. - Full documentation and a wide choice of development tools • Product longevity - Advanced core and peripherals made in a state-of-the art technology - A family of products for applications with 2.95 to 5.5 V operating supply 主要特性: Core • 16 MHz advanced STM8 core with Harvard architecture and 3-stage pipeline • Extended instruction set Memories • Medium-density Flash/EEPROM: - Program memory up to 32 Kbytes; data retention 20 years at 55°C after 10 kcycles - Data memory up to 1 Kbytes true data EEPROM; endurance 300 kcycles • RAM: Up to 2 Kbytes Clock, reset and supply management • 2.95 V to 5.5 V operating voltage • Flexible clock control, 4 master clock sources: - Low power crystal resonator oscillator - External clock input - Internal, user-trimmable 16 MHz RC - Internal low power 128 kHz RC • Clock security system with clock monitor • Power management: - Low power modes (wait, active-halt, halt) - Switch-off peripheral clocks individually • Permanently active, low consumption power-on and power-down reset Interrupt management • Nested interrupt controller with 32 interrupts • Up to 37 external interrupts on 6 vectors Timers • 2x 16-bit general purpose timers, with 2+3 CAPCOM channels (IC, OC or PWM) • Advanced control timer: 16-bit, 4 CAPCOM channels, 3 complementary outputs, dead-time insertion and flexible synchronization • 8-bit basic timer with 8-bit prescaler • Auto wake-up timer • Window and independent watchdog timers Communications interfaces • UART with clock output for synchronous operation, Smartcard, IrDA, LIN • SPI interface up to 8 Mbit/s • I2C interface up to 400 Kbit/s Analog-to-digital converter (ADC) • 10-bit, ±1 LSB ADC with up to 10 multiplexed channels, scan mode and analog watchdog I/Os • Up to 38 I/Os on a 48-pin package including 16 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 Unique ID • 96-bit unique key for each device 
圖1.STM8S105xx方框圖 STEVAL-IFN004V1: BLDC six-step motor drive based on the L6230 and STM8 The STEVAL-IFN004V1 is a demonstration board based on STMicroelectronic’s STM8S105K4 microcontrollers and the DMOS fully integrated 3-phase motor driver L6230 implementing a trapezoidal control (6-step) for a brushless direct current motor (BLDC) in both sensor and sensorless configurations. It is designed as an evaluation environment for motor control applications in the range of 8 V - 48 V of DC bus voltage (which is extendable up to 52 V) and nominal power up to 35 W using the STM8S105K4 microcontroller with internal 16 kB Flash and the L6230 DMOS driver with 2.8 A output peak current, non-dissipative overcurrent detection/protection, cross conduction protection, uncommitted comparator, thermal shutdown, and undervoltage lockout. With dedicated hardware evaluation features, the STEVAL-IFN004V1 board is designed to help developers evaluate the device and develop their own applications. The STEVAL-IFN004V1 can be used together with the STM8 BLDC firmware library v1.0 and constitutes a complete motor control evaluation and development platform. The characteristics of the STEVAL-IFN004V1 BLDC 6-step driver board are the following: ● DC voltage range from 8 V to 48 V (extendable up to 52 V) ● Maximum load current of 1.4 Ar.m.s. (2.8 A peak) for each output ● Integrated DC-DC regulator (5 V) ● Monolithic power stage in QFN package featuring overcurrent and thermal protections ● Single shunt current sensing ● Control interface through trimmer and buttons ● Debug outputs ● Hall sensor/encoder inputs ● Optimized layout on 4-layer board for high thermal performance. The demonstration kit is designed to fit all typical low-power BLDC motor applications, for example: ● Cooling fans ● Pumps
圖2. STM8S105xx評估板STEVAL-IFN004V1外形圖
圖3.評估板STEVAL-IFN004V1電路圖(1)
圖4.評估板STEVAL-IFN004V1電路圖(2) 評估板STEVAL-IFN004V1材料清單:
圖5.評估板STEVAL-IFN004V1 PCB布局圖:頂層和內1層
圖6.評估板STEVAL-IFN004V1 PCB布局圖:底層和內2層 詳情請見: 
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