STC8F Datasheet PDF - STCmicro Technology Co,.Ltd

Overview
   STC8F family of MCUs are single clock/machine cycle (which is also called 1T) microcontrollers produced by STC Co. Ltd. It is a new generation of 8051 core MCU with wide voltage range, high speed, high reliability, low power and super strong anti- interference. STC8F family of MCUs use STC ninth generation encryption technology so that they can not be decrypted. They have a fully compatible instruction set with traditional 8051 family of microcontroller. With the enhancedkernel, STC8F family of MCUs are faster than the traditional 8051 MCU at about 11.2~13.2 times.

   High precision of ±0.3% R/C clock is integrated in MCU with ±1% temperature drift under the temperature range of -40°C to +85°C, and ±0.6% temperature drift under normal temperature range from -20°C to +65°C. The frequency of RC clock can be set from 5MHz to 30MHz when programming a MCU using ISP. Moreover, high reliable reset circuit with 4 level optional reset threshold voltage is integrated in MCU. So, external expensive crystal and the external reset circuit can be eliminated completely.

   There are three optional clock sources inside the MCU, internal 24MHz high precision IRC, internal 32KHz low speed IRC, external 4MHz~33MHz oscillator or external clock signal. The clock source can be freely chosen in the user code. After the clock source is selected, it can be 8-bit divided freely, and then be supplied to the CPU and the peripherals.

   Rich digital peripherals and analog peripherals are provided in MCU, including 4 serial ports, 5 timers, 4 sets of PCA, 8 groups of enhanced PWM and I2C, SPI, 16 channels 12 bit ADC and comparator, which can meet almost all the needs of users when designing a product.

   The enhanced dual data pointers are integrated in the STC8F family of microcontrollers. Using program control, the function of automatic increasing or decreasing of data pointer and automatic switching of two sets of data pointers can be realized.