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CH552 manual
1
8 Enhanced USB single-chip CH552, CH551
Manual Version: 1 http://wch.cn
1 Overview
CH552 chip is a microcontroller core E8051 compatible MCS51 enhanced instruction set that 79% of single-byte instructions are single cycle instructions, instruction average velocity MCS51 8 to 15 times faster than the standard.
CH552 system supports up to 32MHz frequency, built 16K bytes of program memory ROM and 256 bytes of internal iRAM 1K and the inner sheet xRAM, xRAM supports direct memory access DMA.
CH552 built ADC analog to digital converter, a capacitance detection touch key, group 3 and the PWM signal acquisition and timers, dual asynchronous serial interface, SPI, USB full-speed device controller and transceiver function modules.
CH551 Datasheet
