8051 Compatible CPU Core

The so_ip_8051C256 is a soft core of a 8-bit CPU dedicated for operation with fast (on-chip) and slow (off-chip) memories.

So_ip_8051C256 soft core is 100% binary compatible with the CPU from industry standard 8051 microcontroller. It executes all ASM51 instructions and has the same instruction set as the 8031. The so_ip_8051C256 serves both software and hardware interrupts.

So_ip_8051C256 core has an advanced architecture that enables it to be 4.51 times faster than the CPU from original 8051 microcontroller.

So_ip_8051C256 core is delivered with fully automated testbench and a compete set of tests allowing easy package validation at each stage of SoC design flow.

The so_ip_8051C256 core is a microcode-free design developed for reuse in FPGA implementations. The design is strictly synchronous with positive-edge clocking, no internal tri-states and a synchronous reset.

Key features:

• 100% software compatible with industry standard 8051
• Advanced architecture enables to execute instructions on average 4.51 times faster compared to original 8051
• 8 times faster multiplication
• 8 times faster division
• 4 times faster addition
• 256 bytes of internal (on-chip) Data Memory
• Up to 64K bytes of internal (on-chip) or external (off-chip) Program Memory
• Up to 64K bytes of internal (on-chip) or external (off-chip) Data Memory
• De-multiplexed Address/Data bus to allow easy connection to memory
• Fully synthesizable synchronous design with positive edge clocking and no internal tri-states