CH559L Minimum System Board

The smallest system board based on Qinheng CH559L, with all IO/HUB leads, and can be connected to an external crystal oscillator.

Introduction to CH559L

The CH559 chip is an enhanced E8051 core microcontroller compatible with the MCS51 instruction set. 79% of its instructions are single-byte single-cycle instructions, and the average instruction speed is 8 to 15 times faster than the standard MCS51.

CH559 supports the highest system frequency of 56MHz, built-in 64K program memory Flash-ROM, 256-byte internal iRAM and 6K-byte on-chip xRAM. Some xRAM supports DMA direct memory access.

CH559 has built-in ADC analog-to-digital conversion, 4 sets of timers and PWM, dual asynchronous serial ports, dual SPI and other functional modules, as well as a built-in dual-port Root-HUB, supporting USB-Host host mode and USB-Device device mode.

STC has gone up like crazy, and just buying one piece is not as affordable as buying Qinheng.

Board introduction

Pure's smallest system board, the U number is only ranked 1.

characteristic:

• Chip independent power switch
• 5V/3.3V/chip power supply indicator LED
• Onboard 500mA fuse
• An external crystal oscillator pad is reserved to facilitate the development of projects that require an external crystal oscillator.
• Download/reset button
• Three independent LEDs are connected to PWM1-3 respectively and can be used as operating indicators.
• USB Hub/Device interface lead out

Note: The chip is powered by 3.3VLDO output.

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The CH559L third-party firmware library is being updated. Welcome everyone to play with the Gitee link.