The STC15W4K32S4-30I with STC LQFP-44_10x10x08P RoHS is an 8-bit single-chip microcontroller manufactured by STC. It is powered by an ARM Cortex-M3 core with a maximum working frequency of up to 30MHz. It contains 32K bytes of Flash program memory, 4K bytes of RAM and a built-in LCD/LED driver. It also has 11 general-purpose I/O ports, 10-channel 12-bit A/D converter and a list of PDIPs and interrupts. This microcontroller has been designed for low power operation and is RoHS compliant.