</a>STM8S105xx" title="STM8S105xx">STM8S105xx" title="STM8S105xx">STM8S105xx是8位MCU,提供16-32KB闪存程序存储器和数据EEPROM,读/写次数高达300k,具有降低系统成本的优势,CPU工作频率16MHz,工作电压2.95V-5.5V. ST公司的STEVAL-IFN004V1评估板是采用L6230和STM8的六步进马达驱动器,DC电压从8V到48V,没个输出最大负载电流1.4 Ar.m.s(峰值2.8A),集成了5V DC/DC稳压器,适用于冷却风扇和泵.本文介绍了STM8S105xx主要优势和特性,方框图, STEVAL-IFN004V1评估板主要特性,电路图和材料清单与PCB布局图.

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主要优势:

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

图1.STM8S105xx方框图

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


图2. STM8S105xx评估板STEVAL-IFN004V1外形图

图3.评估板STEVAL-IFN004V1电路图(1)

图4.评估板STEVAL-IFN004V1电路图(2)

评估板STEVAL-IFN004V1材料清单:




图5.评估板STEVAL-IFN004V1 PCB布局图:顶层和内1层

图6.评估板STEVAL-IFN004V1 PCB布局图:底层和内2层
详情请见:
http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/DATASHEET/CD00200092.pdf
和
http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/USER_MANUAL/DM00040505.pdf