ST公司的8位STM8S207/208系列MCU有32位存储器接口和三级流水线,在24MHz时可达到20MOPS的性能. STM8S把内核的高速高性能和有多种外设的代码效率组合在一起,同是集成了真正的EEPROM,从而简化了仿真,降低了系统成本和开发时间,增加了工业应用和家用电器的性能.本文介绍了STM8S207/208系列MCU的主要性能,方框图,电源连接图, 参考设计电路图以及调试系统方框图.

The STM8S207/208 performance line 8-bit microcontrollers offer from 32 Kbytes up to 128 Kbytes of program memory and integrated true data EEPROM.

All devices of the STM8S207/208 performance line provide the following benefits:
●Reduced system cost
ntegrated true data EEPROM for up to 300 k write/erase cycles
High system integration level with internal clock oscillators, watchdog and brownout reset
●Performance and robustness
20 MIPS at 24 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 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 3.0 V to 5.5 V operating supply

STM8S207/208主要特性:
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
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 poweron 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 watchdog and independent watchdog
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
Analog to digital converter (ADC)
■10-bit, ±1 LSB ADC with up to 16 channels
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 Single Wire Interface Module (SWIM) for fast on-chip programming and non intrusive debugging
On-chip Debug Module (DM)



图1. STM8S207/208方框图
The device can be supplied through a 3.0 V to 5.5 V external source. An on-chip power
management system provides the 1.8 V digital supply to the core logic, both in normal and
low power modes. It is also capable of detecting voltage drops, on both main external (3.3
V/5 V) and internal (1.8 V) supplies.

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