The CH552 chip is an enhanced E8051 core microcontroller compatible with the MCS51 instruction set.
Its 79% instruction is a single-byte single-cycle instruction, and the average instruction speed
is 8 to 15 times faster than the standard MCS51.
The CH552 supports up to 24MHz system frequency, built-in 16K program memory ROM and 256 bytes of internal iRAM
and 1K bytes of on-chip xRAM. xRAM supports DMA direct memory access.
CH552 has built-in ADC analog-to-digital conversion, touch button capacitance detection, 3 groups of timers and signal capture and PWM,
dual asynchronous serial port, SPI, USB device controller and full-speed transceiver, USB type-C and other functional modules.
Enhanced E8051 core CPU, 8-15 times faster than the standard MCS51, unique XRAM data fast copy instructions;
> Built-in 16KB Code Flash, 1KB XRAM and internal 256B iRAM, 128B DataFlash, support byte mode read and write;
> Built-in 2KB BootLoader, support USB and serial ISP, provide ISP download library;
> Built-in USB controller and USB transceiver, support USB-Device device mode, support USB type-C master-slave detection,
support USB 2.0 full speed 12Mbps or low speed 1.5Mbps. Supports up to 64 bytes of data packets, built-in FIFO, and supports DMA;
> Built-in USB controller and USB transceiver support USB2.0 full speed and low speed host or device mode. Supports up to 64 bytes of data packets,
built-in FIFO, and supports DMA;
> Provide 3 groups of timers/counters to support 2 channels of signal capture and 2 channels of PWM output;
> Provide 3 groups of timers/counters to support 2 channels of signal capture and 2 channels of PWM output;
> Provide 2 full-duplex asynchronous serial ports, all support high baud rate communication, UART0 is standard MCS51 serial port;
> Provide 1 SPI communication interface, built-in FIFO, support Master/Slave master-slave mode;
> Provides 4-channel 8-bit A/D analog-to-digital converter for voltage comparison;
> Support 6-channel capacitance detection, support up to 15 touch buttons, support independent timing interrupt;
> Supports 4 kinds of reset signal sources, built-in power-on reset, support software and watchdog overflow reset, optional external pin reset;
> Built-in 24MHz clock source and PLL, external crystal can be supported by multiplexing GPIO pins;
> Built-in 5V to 3.3V low dropout voltage regulator supports 5V or 3.3V or even 2.8V supply voltage. Support low-power sleep,
support USB, UART0, UART1, SPI0 and some GPIO external wake-up;
> The chip has a unique ID number built in;
> SOP-16 package;
ch552.pdf
