Overview: 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 to CH552 is a simplified version, only program memory ROM 10K, the sheet xRAM only 512 bytes, only asynchronous serial UART0 provided, only SOP16 package, and removes the ADC analog to digital conversion module and a USB type-C module in addition addition to the above difference with the same CH552, CH552 direct reference manuals and information.
The following is an internal block diagram CH552 for reference purposes only. ROM 16KB iFlash DataFlash 128B iRAM 256B xRAM 1KB Timer0 Timer1 Timer2 Cap1 / 2 UART1 UART0 PWM1 PWM2 Reset
Power-on Watch-dog
Reset Oscillator 1T E8051 Core
XT Internal 4xPLL USB Device LDO VolReg 5V-> 3.3V Internal Address & Data & DMA Bus 8-bit Port3 CMP 8-bit ADC 8-bit Port2
Port1 XT OSC SPI0 M Touch /S Key Pins: GND VCC V33 RST P30 ~ P37 P10 ~ P17 2.
