Siliconinsider on X: "Intel 8051AH (1980) MCS-51 NMOS 8bit microcontroller with 4kB ROM and 128 Bytes RAM. The intel 8051 is possibly one of the most popular microcontroller architecture, with many derivatives
Intel MCS-51 – Wikipedia
Intel MCS-51 – Wikipedia
8051 Datasheet(PDF) - Intel Corporation
www.cpu-galaxy.at vintage Intel 8051 section
EE80C51FA24-S-F88 Intel Micro-Controller IC 8-Bit 80C51 8051 - NOS Qty 1 | eBay
Intel 8051 8-bit Microcontroller | ResiSTORE
Introduction to the 8051 Microcontroller
Datei:Intel 8051 arch.svg – Wikipedia
www.cpu-galaxy.at vintage Intel 8051 section
Microcontrollers - 8051 Architecture
What Is A 8051 Microcontroller? | Basics for Beginners
8051 MicroController Architecture - javatpoint
Intel's 8052, an 8051 with Basic built in - Hardware - Retro Computing
Intel's MCS-51 Microcontroller Family - It's Here to Stay