This fully configurable 80251 Microcontroller Core executes the MCS-51 and MCS-251 instruction sets and is delivered with a variety of integrated peripherals such as USB, Ethernet, I²C, SPI, UART, CAN, LIN, HDLC and Smart Card.
Digital Core Design launched its first version of the DQ80251 in 2011, offering performance 66 times faster than the original 8051 chip; this version uprates that to execute MCS-51 and MCS-251 instruction sets 75.08 times faster than the original chip. The DQ80251 boasts a Dhrystone 2.1 performance rating of 0.70579 DMIPS/MHz, which therefore enables a 75.08 times speed-up over the original 80C51 chip operating at the same frequency. The DQ8051’s dynamic power consumption is also very low. The same, it rivals not only all other 8051-compatible cores but also low-power 32-bit processors.
The DQ80251 is a royalty-free, cost-effective 8051 IP Core with ultimate code density and instruction intelligence. DCD enhanced the core’s functionality by implementing a variety of integrated peripherals, and to enable more complex SoCs design, the DQ80251 is equipped with built-in on-chip debugger (DoCD). It is a real-time hardware debugger, which provides debugging capability of a whole System-on-Chip (SoC). Unlike other on-chip debuggers, the DoCD provides non-intrusive debugging of a running application. It can halt, run, step into or skip an instruction, read/write any contents of the microcontroller, including all registers, internal and external program memories and all SFRs, including user defined peripherals. DCD says that 8051 CPUs can take a place in high-demand products, thanks to plenty of horsepower and many advantages such as low costs, energy and area, also, the DQ80251 is easy to integrate and program.
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