Features:  - Up to 17 standard universal pins, plus one pin that can only be used as input. All output pins can be configured with two output slopes via software.    CPU:  - Fully static 8-bit 1T 8051 core CMOS microcontroller.  - The instruction set is fully compatible with MCS-51.  - Level 4 priority interrupt configuration.  - Double Data Pointers (DPTRs).    Working conditions:  - Wide voltage operating range from 2.4V to 5.5V.  - Wide operating frequency up to 16MHz.  - Industrial operating temperature -40°C to +105°C.    Memory:  - Up to 18K bytes of APROM user program code area.  - Configurable 4K/3K/2K/1K/0K byte LDROM boot code area for flexible user configuration.  - All FLASH areas are separated by 128 bytes.  - Built-in IAP programming function.  - Code encryption.  - 256 bytes of on-chip direct access to RAM.  - Additional 768 bytes of on-chip indirect access RAM (XRAM) read and write via MOVX instructions.    Clock source:  - 16 MHz high speed internal oscillator with ±1% accuracy rating at 5.0V supply. Full working condition range ± 2% accuracy level.  - 10 kHz low speed internal oscillator.  - Support for external clock input.  - Support system clock real-time software switching (On-the-fly) function.  - Support software configuration clock divide by up to 1/512.    Package includes:  1 x Development Board;  1 x USB cable;  1 x Pins set (unsoldered);  1 x 11pin leader for display