STC Microcontroller STC8H8K64U-45I-SKDIP28
Ultra-high speed 8051 Core with single clock per machine cycle, which is called 1T and the speed is about 12 times faster than traditional 8051
Fully compatible instruction set with traditional 8051
22 interrupt sources and 4 interrupt priority levels
Online debugging is supported
Operating voltage 1.9V~5.5V
Operating temperature -40℃~85℃ (The chip is produced in -40℃~125℃ process. Please refer to the description of the electrical characteristics chapter for applications beyond the temperature range)
Flash memory Up to 64Kbytes of Flash memory to be used to store user code
Configurable EEPROM size, 512 bytes single page for being erased, which can be repeatedly erased more than 100 thousand times.
In-System-Programming, ISP in short, can be used to update the application code. No special programmer is needed.
Online debugging with single chip is supported, and no special emulator is needed. The number of breakpoints is unlimited theoretically.
SRAM 128 bytes internal direct access RAM (DATA, use keyword data to declare in C language program)
8192 bytes internal extended RAM (internal XDATA, use keyword xdata to declare in C language program)
1280 bytes USB Data RAM
Internal high precise RC clock IRC(IRC for short, ranges from 4MHz to 45MHz), adjustable while ISP and can be divided to lower frequency by user software, 100KHz for instance.
Error:±0.3% (at the temperature 25℃) -1.35%～+1.30% temperature drift (at the temperature range of -40°C to +85°C) -0.76%～+0.98% temperature drift (at the temperature range of -20℃ to 65℃)
Internal 32KHz low speed IRC with large error
External crystal (4MHz～33MHz) and external clock