CH551G Development board - SOP16 USB microcontroller with 10KB ROM/ 256-bytes IRAM/ 512-bytes XRAM and DMA

Features Complete development board in a pocket-size with SOP16 package Rich I/O interfaces for project expandability 4 channel capacitive touch buttons for touch applications Support USB 2.0 full speed 12mbps or low speed 1.5mbps with direct download Compatible with breadboard via the header with 2.54mm pin spacing Description CH551G development board features the CH551 chip, which is an enhanced e8051 core single-chip microcomputer compatible with MCS51 instruction set. 79% of its instructions are single-byte single-cycle instructions, and the average instruction speed is 8-15 times faster than the standard MCS51. Ch551 supports up to 24MHz system main frequency. It has built-in 10KB program memory (ROM), 256-byte internal IRAM, and 512 bytes on-chip xram. Xram supports DMA (direct memory access). The ch551 has 4 channel capacitive touch buttons, three sets of timers and signal capture, PWM, SPI, asynchronous serial port (UART0), USB device controller, and full speed transceiver. Specifications Core: enhanced e8051 core, compatible with MCS51 instruction set. 79% of its instructions are single byte single cycle instructions. The average instruction speed is 8-15 times faster than the standard MCS51. It has a special xram data replication instruction and double dptr pointer. ROM: 10 KB capacity of multi programmable non-volatile memory ROM, can be used for all program storage space Data Flash: 128 bytes multi erasable non-volatile data memory, which supports rewriting data in bytes. RAM: 256 bytes internal RAM, which can be used for fast data storage and stack; 512 bytes on chip xram can be used for large amount of data temporary storage and DMA (direct memory access). USB: embedded USB controller and USB transceiver, supporting USB device mode, master-slave detection, supporting USB 2.0 full speed 12mbps or low-speed 1.5mbps. FIFO is built-in and supports 64 bytes of data packets. Timer: three groups of timers, t0 / T1 / T2 is the standard MCS51 timer. Capture: timer T2 is extended to support 2-way signal capture. PWM: 2 sets of PWM output, pwm1 / pwm2 is 2-way 8-bit PWM output. UART: asynchronous serial port, support higher communication baud rate, UART0 is the standard MCS51 serial port. SPI: SPI controller has built-in FIFO, clock frequency up to half of the system's main frequency Fsys, supports serial data input and output simplex multiplexing, and supports master / slave mode. Touch key: 4-channel capacitance detection, support independent timing interrupt. GPIO: supports up to 17 GPIO pins (including Xi / XO, RST and USB signal pins). Interrupt: supports 14 groups of interrupt signal sources, including 6 groups of interrupts (INT0, T0, INT1, T1, etc.) compatible with standard MCS51 UART0, T2), and extended 8 groups of interrupts (spi0, tkey, USB, ADC, uart1, pwmx, GPIO, wdog), in which GPIO interrupt can be selected from 7 pins. Watch dog: 8 bits can preset watchdog timer wdog, support timing interrupt. Reset: support 4 kinds of reset signal source, built-in power on reset, support software reset and watchdog overflow reset, optional pin external input reset. Clock: built in 24 MHz clock source, which can support external crystal by multiplexing GPIO pins. Power: built in 5V to 3.3V low voltage differential voltage regulator, supporting 5V or 3.3V or even 2.8V power supply voltage. It supports low-power sleep, USB, UART0, uart1, spi0 and part of GPIO external wake-up. The chip has a unique ID number. How to Flash Bootloader? Open WCHISPToolSetup file Press and hold the BL button on the development board and connect the USB cable to the PC Select "8-bit CH55x series from the top menu Select CH551 as the chip mode Check the boxes: "Run the target program after download complete", "Clear DataFlash" Select the file you want to download under "User File" Click the "Download" button Hardware Overview Part List 1 x CH551G Development board