Additional copies of this document or other Intel literature maybe obtained from: Intel Corporation. Literature , and 80C51 Hardware. Description. The Intel AH is a MCS NMOS single-chip 8-bit microcontroller with 32 I/O lines, 2 Timers/Counters, Instruction Set Manual for the Intel AH. The MCS 51 CHMOS microcontroller products are fabricated on Intel’s reliable AN80C51 …Continue reading "INTEL 80C51 PDF"