STM8S Microcontrollers - STMicroelectronics

STMicroelectronics (ST) has introduced its new STM8S microcontroller family. Alongside the advantages of the STM8 core, the new  8-bit STM8S microcontrollers also feature up to 256 Kbytes flash program memory, EEPROM with read while write capability and smart peripherals management. The STM8S microcontroller family is currently sampling to lead customers.

ST’s STM8 core has a 32-bit memory interface and three-stage pipeline. STM8 core is able to achieve 20 MIPS (@24MHz) processing performance. A stack pointer and 16-bit index registers enhance manipulation of tables, and the core’s 16 Mbytes of linear memory address space streamlines paging operations above 64Kbytes.

STM8 Core

STM8S application developers can take advantage of software and package-in-package compatibility within the family, as well as peripheral compatibility throughout ST’s microcontroller families including the 32-bit STM32  microcontroller series. This compatibility provides access to a large catalog of functions including 16-bit advanced control timers with configurable modes, PWM controllers, capture/compare functions,  and interfaces including UARTs, USARTs, CAN, I2C and SPI. Integrated features save footprint and component count, including 16MHz RC oscillator, Power On Reset  and Brown-Out Detector/Reset.

In addition to specific features for reliability and robustness, such as dual independent watchdogs, a clock security system, complementary copy of configuration option bytes, and EMS reset, the STM8S  microcontroller family also includes in-application programming and in-circuit programming, as well as single-wire debug using the industry’s most advanced in-circuit-debugging module. In addition, four low-power modes help developers implement responsive power management schemes in applications such as home appliances and personal-care equipment, battery-operated devices, power tools, HVAC equipment, motor controllers and circuit breakers.

The STM8S microcontroller family is available in two fully compatible lines: the Performance line and the Access line, which has all essential peripherals, but with reduced cost by removing extra features in 4- to 32-Kbyte program memory.

STM8S Microcontroller Family Product Line

Features of STM8S microcontroller family:

(-> STM8S207xx and STM8S208xx)

• Core
  • Max fCPU: up to 24 MHz, 0 wait states @ fCPU≤16 MHz
  • Advanced STM8 core with Harvard architecture and 3-stage pipeline
  • Extended instruction set
  • Max. 20 MIPS @ 24 MHz
• Memories
  • Program memory: Up to 128 Kbytes Flash; data retention 20 years at 85°C after 10 kcycles
  • Data memory: Up to 2 Kbytes true data EEPROM; endurance 300 kcycles
  • RAM: Up to 6 Kbytes
• Interrupt management
  • Nested interrupt controller with 32 interrupts
  • Up to 37 external interrupts on 6 vectors
• Clock, reset and supply management
  • 3.0 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
• 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 watchdog and independent watchdog
• Analog to digital converter (ADC)
  • 10-bit, ±1 LSB ADC with up to 16 channels
• Communications interfaces
  • High speed 1 Mbit/s active CAN 2.0B interface
  • USART with clock output for synchronous operation - LIN master mode
  • LINUART LIN 2.1 compliant, master/slave modes with automatic resynchronization
  • SPI interface up to 10 Mbit/s
  • I2C interface up to 400 Kbit/s
• I/Os
  • Up to 68 I/Os on an 80-pin package including 11 high sink outputs
  • Highly robust I/O design, immune against current injection
• Development support
  • Hardware SWIM (Single Wire Interface Module) for fast on-chip programming and non intrusive debugging
  • On-chip Debug Module (DM)

ST supports application development of STM8 microcontrollers by offering the SWIM (Single Wire Interface Module), simple USB adapter, featuring:

• Non-intrusive debugging – no wasted target resources, no reserved
• Real-time read and write of RAM and peripheral registers - no wait, no stall
• NVM addresses, no monitor
• Hot-plug during application execution and post-mortem debug
• Step-by-step code execution
• Unlimited breakpoints on all memory instructions
• Hardware breakpoints – 23 configurations
• Fast Flash programming

SWIM (Single Wire Interface Module) for STM8 microcontrollers

For the most demanding applications, ST offers the FPGA-based STICE emulator, which complements the environment with solutions for code tracing, code coverage measurement and profiling.

The STM8S development environment supports high-end emulators that include complex functions such as code profiling and coverage, as well as low-cost debugging tools offering free IDEs and free 16-Kbyte versions of C compilers.

Price of STM8S microcontrollers begin at less than $1.00 (10K unit qty) in the LQFP32 package with 32 Kbytes Flash .

More information about STM8-core microcontrollers can be found at ST’s website