The OKY3420-1 is a processor module designed and manufactured by OKYSTAR, a company specializing in the production of industrial automation products. This module is a 32-bit ARM Cortex-M4F core MCU with 160KB of onboard RAM and 2KB of EEPROM. The OKY3420-1 also has an integrated PMW module, which provides 8-bit/10-bit analog-to-digital converters and PWM/Timer signals. The module also has several I/O interfaces, including UART, SPI, IIC and USB, as well as various buzzer and LED connectivity options. This processor module is ideal for applications such as motor control, human-machine-interface design, and others.