STM8S207CBT6 Microcontroller Functions, Specifications, Operating Principle and Package

05 March 2024 20


Ⅰ. STM8S207CBT6 overview

Ⅱ. Functions of STM8S207CBT6

Ⅲ. STM8S207CBT6 specifications

Ⅳ. STM8S207CBT6 structure and operating principle

Ⅴ. Package and dimensions of STM8S207CBT6

Ⅵ. Four low-power modes of STM8S207CBT6 microcontroller

Ⅶ. Application areas of STM8S207CBT6



Ⅰ. STM8S207CBT6 overview


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STM8S207CBT6 belongs to the 8-bit MCU microcontroller series. In the reference manual of the STM8S microcontroller family, it is designated as a high-density device. The STM8S207CBT6 delivers reliable performance, reduced system cost, extended service life and reduced development time. It features integrated true data EEPROM with up to 300k write or erase cycles, and advanced system integration including an internal clock oscillator, watchdog timer and power-down reset, all of which help reduce system cost. It has a CPU clock frequency of 24MHz, delivers 2OMIPS, and has enhanced features such as powerful I/O, an independent watchdog with a dedicated clock source, and a clock safety mechanism to ensure device performance. The scalability of a common product line architecture with compatible pinouts, memory mapping and modular peripherals ensures shorter development cycles. In addition, the precision core of the STM8S series is built with cutting-edge technology and is suitable for applications with an operating voltage range of 2.95V to 5.5V, thus ensuring product durability.


Alternatives and equivalents:

STM8S207CBT6TR

• STM8S207CBT3TR

STM8S207C8T6TR



Ⅱ. Functions of STM8S207CBT6


STM8S207CBT6 has the following functions:

1. High performance: STM8S207CBT6 adopts an 8-bit CPU core, which is capable of realizing highly efficient instruction execution and data processing capabilities.

2. Low power consumption: STM8S207CBT6 is designed with a low power consumption level, which is suitable for some application scenarios with high power consumption requirements.

3. Multiple communication interfaces: STM8S207CBT6 integrates a variety of communication interfaces, including SPI, I2C, UART, etc., which facilitates data transfer and communication with external devices.

4. Multiple peripheral interfaces: STM8S207CBT6 is equipped with a variety of peripheral interfaces, including timers, analog inputs and outputs, pulse width modulation (PWM), and multi-channel ADCs, which make it capable of meeting the needs of different applications.



Ⅲ. STM8S207CBT6 specifications


• The power dissipation of this microcontroller is 443 mW.

• The ADC resolution of this microcontroller is 10 bit.

• Its data RAM size is 6 kB.

• Its mounting method is SMD or SMT.

• Its clock frequency is 24.0 MHz.

• It has a supply voltage of 2.95 V to 5.5V.

• The program memory size of the STM8S207CBT6 is 128 kB.

• The STM8S207CBT6 is manufactured by STMicroelectronics.

• The STM8S207CBT6 has a length of 7 mm, a width of 7 mm and a height of 1.4 mm.

• The STM8S207CBT6 has 48 pins and comes in LQFP-48 package and tray packaging.

• The microcontroller has a minimum operating temperature of -40 °C and a maximum operating temperature of 85 °C.



Ⅳ. STM8S207CBT6 structure and operating principle


The working principle of STM8S207CBT6 is to execute program instructions stored in the memory through the CPU, and at the same time to interact with the external world by using the integrated peripherals and interfaces, and to optimize the system performance and power consumption through interrupt processing and power management.


1. CPU: The CPU of the STM8S207CBT6 is the core of the microcontroller and is responsible for executing program instructions, processing data, and controlling the operation of the entire system. The operating speed (clock frequency) of the CPU is usually specified in the technical specifications of the STM8S207CBT6.


2. Memory: The STM8S207CBT6 typically includes several types of memory, such as Flash Memory for storing program code and constant data, and RAM for storing variables and temporary data. The CPU reads instructions and data from memory as it executes a program, and stores the results back in memory.


3. Peripherals and interfaces: The STM8S207CBT6 also integrates a variety of peripherals and interfaces, such as general-purpose input/output (GPIO) pins for communicating with external devices, timers and counters for generating precise time delays or measurements, as well as communication interfaces such as SPI, I2C, UART, and so on.


4. Interrupt and event handling: The STM8S207CBT6 supports interrupt handling, i.e., when a specific event (e.g., external signal change, timer overflow, etc.) occurs, the CPU can interrupt the executing program and instead execute the corresponding interrupt service program (ISR). This enables the microcontroller to respond to and process real-time events, improving system efficiency.


5. Power management: In order to reduce power consumption, the STM8S207CBT6 provides a variety of low-power modes, such as wait mode and active stop mode. These modes allow the microcontroller to enter a low-power state when it does not need to be fully operational, while retaining important data and functions.



Ⅴ. Package and dimensions of STM8S207CBT6


The STM8S207CBT6 has a length of 7 mm, a width of 7 mm, and a height of 1.4 mm. It has 48 pins and comes in LQFP-48 package and tray packaging. Below is its package diagram:


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Ⅵ. Four low-power modes of STM8S207CBT6 microcontroller


For efficient power management, STM8S207CBT6 applications can select one of four different low-power modes. We can configure each mode as needed to find the best balance between lowest power consumption, startup time and available wake-up sources.


1. Waiting mode

In wait mode, the STM8S207CBT6 CPU will stop running, but the peripheral devices will still keep working. Wake-up operations in this mode can be achieved through internal or external interrupts, as well as reset operations. The advantage of this mode is that stopping the CPU can save a lot of power, and the continuous work of peripheral devices can also ensure the system's ability to respond to the external environment.


2. Stop mode

In stop mode, the STM8S207CBT6 microcontroller reaches its lowest power state, clocks to the CPU and peripherals are stopped, and the main voltage regulator is turned off. At this time, the system's wake-up can only be triggered by external events or reset operations.


3. Active stop mode (with voltage regulator)

In this mode, the CPU and peripheral clocks are stopped, but the main voltage regulator remains powered. This enables the system to generate internal wake-ups (AWUs) at programmable intervals, resulting in faster system startup. Although the current consumption in this mode will be slightly higher than the active stop mode with the regulator turned off, its faster wake-up speed makes it more advantageous in certain application scenarios.


4. Program execution flow

The execution process on the STM8S207CBT6 usually starts from reset, where the CPU starts executing the program from a predefined reset vector address. The program then follows a predetermined sequence of instructions, accesses data in memory, and may respond to external events through interrupts.



Ⅶ. Application areas of STM8S207CBT6


• Power management system: In battery management, STM8S207CBT6 is responsible for monitoring key parameters such as battery voltage, current and temperature, as well as the health status of the battery. It is able to accurately manage and control the battery through intelligent algorithms to prevent problems such as overcharging, over-discharging and overheating, thus extending the service life of the battery and improving the safety and reliability of the device.


• Temperature and humidity monitor: We connect STM8S207CBT6 with temperature and humidity sensor to realize the collection and monitoring of environmental temperature and humidity data. It can send the data to the monitor or network module through UART, SPI or I2C interface to realize remote monitoring.


• Industrial production line controller: In the industrial production line, STM8S207CBT6 works closely with various position sensors, motor controllers, etc. to ensure that each production link is precisely controlled. When there is a fault or abnormality in one part of the production line, STM8S207CBT6 can quickly sense and react to activate the protection mechanism in time to avoid the expansion of the fault and ensure the stable operation of the production line.


• Electronic door lock controller: We connect STM8S207CBT6 with the electronic lock control module to realize the switch control and user management function of the electronic door lock. It can realize the unlocking of the door lock by password, fingerprint, RFID, etc., which improves the security and convenience.


• Intelligent agricultural system: We use STM8S207CBT6 for agricultural sensor data acquisition and control, such as soil moisture sensor, irrigation controller and so on. It can realize the functions of smart agriculture system, such as remote monitoring, environment monitoring and automatic irrigation, to improve the yield and quality of crops.


• Medical device controller: In medical devices, STM8S207CBT6 is widely used for controlling devices such as heart rate monitors, blood pressure monitors and ventilators. It can accurately control the operation of these devices, ensuring high precision and efficiency when the devices collect and process physiological data. At the same time, it can also monitor the working status of the devices in real time. Once abnormalities are detected, it immediately activates the protection mechanism, thus ensuring the safe operation of medical equipment.




Frequently Asked Questions


1. What is STM8 microcontroller?


The STM8 is an 8-bit microcontroller family by STMicroelectronics. The STM8 microcontrollers use an extended variant of the ST7 microcontroller architecture. STM8 microcontrollers are particularly low cost for a full-featured 8-bit microcontroller.


2. What is the architecture of STM8S207CBT6?


The STM8S207CBT6 features a core based on a high-performance 8-bit CPU, offering advanced and efficient processing capabilities.


3. What development tools are available for programming STM8S207CBT6?


STMicroelectronics provides a comprehensive set of development tools including an Integrated Development Environment (IDE) called STM8CubeIDE, which supports code development, debugging, and programming of STM8 microcontrollers including STM8S207CBT6.




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