8051 Compatible Microcontroller Core

The so_ip_8051M256 is a soft core of a single-chip 8-bit embedded microcontroller dedicated for operation with fast (on-chip) and slow (off-chip) memories.

So_ip_8051M256 soft core is 100% binary compatible with the industry standard 8051 microcontroller. It executes all ASM51 instructions and has the same instruction set as the 8031. The so_ip_8051M256 serves both software and hardware interrupts, and has standard peripheral units like timers and serial communication system.

So_ip_8051M256 has an advanced architecture that enables it to be 4.51 times faster than the original 8051 microcontroller.

So_ip_8051M256 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_8051M256 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.

• 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
• Interrupt Controller
• 2 priority levels
• 2 external sources
• 3 internal sources from peripherals
• Four 8-bit I/O Ports
• Separate input and output lines
• Alternate port functions such as interrupts and serial interface are
• separated, providing extra port pins in comparison with original 8051
• Two 16-bit timer/counters
• Timers clocked by internal source
• Auto reload 8-bit timers
• Externally gated event counters
• Full-duplex serial port
• Synchronous mode, fixed baud rate
• 8-bit asynchronous mode, variable baud rate
• 9-bit asynchronous mode, fixed baud rate
• 9-bit asynchronous mode, variable baud rate

• Embedded microcontroller systems
• Data computation and transfer
• Communication systems
• Professional audio and video

• VHDL Source Code or netlist
• Verification environment with regression suite
• Technical documentation
• Installation notes
• User Manual
• Datasheet
• Instantiation templates
• Reference Design
• Technical Support
• IP Core implementation support
• Variable length maintenance
• Delivery of IP Core updates, minor and major changes
• Delivery of documentation updates
• Telephone & email support