MicroThe STC90C58RD+-40I-LQFP44 is an 8-bit single-chip microcontroller manufactured by STC Micro, housed in the STC LQFP-44_10x10x08P RoHS package. It is based on the 8051 microcontroller architecture, and is often used in a wide variety of embedded control and automation applications. The chip has an on-chip 12K byte Internal RAM, 1K byte of Internal ROM, 128 bytes Internal Data RAM and 8K bytes of External ROM. Additionally, it offers a range of built-in peripherals, including an 8-bit timer and counter, a 10-bit Analog-to-Digital Converter, an interrupt controller, two serial ports, and 8 programmable I/O ports. The STC90C58RD+-40I-LQFP44 operates at an up to 40MHz frequency and features low power consumption and high integration in a 44-pin LQFP (low-profile quad-flat package).