原创 8051 IP核（VHDL）

8051 IP核（VHDL）<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

1.MC8051

MC8051出新版本(1.5)了！

以下是1.5版的更新说明:

September 2006: Oregano Systems - Design & Consulting GesmbH
===========================================================
Changes:
- When an interrupt is pending and the instruction executed
  is RETI or a write access to IE or IP one more instruction
  is executed before vectoring to the interrupt routine.
- The synchronization stage of the interrupt inputs in the
  timer/counter unit has been hardended with additional
  series flip-flops due to the high operating frequencies
  nowadays in use.
- A prescaler in the serial interface unit has been changed
  to 1/12 instead of 1/16 to conform to mode 0 databook
  descriptions.
- The carry flag was incorrectly reset during a special
  situation. This has been corrected.
- tmr/ctr1 erroneously used his run flag when tmr/ctr0 was
  in mode 3. This has been corrected.
- In certain interrupt situations the stack pointer has
  been erroneously set. This has been corrected.

http://www.oregano.at/ip/8051.htm

mc8051_design.zip  https://static.assets-stash.eet-china.com/album/old-resources/2009/2/10/196f0b76-cfd6-4dc4-9719-b5dc33108a98.zip

2.C8051

The C8051 is a fully functional 8-bit embedded controller that executes all ASM51 instructions and has the same instruction set as the <?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" />80C31. The C8051 serves software and hardware interrupts, provides an interface for serial communications and a timer system.

The C8051 is the microcode-free design developed for reuse in ASIC and FPGA implementations. The design is strictly synchronous with positive-edge clocking and with no internal tri-states. Reset is also synchronous. Therefore scan insertion is straightforward.

http://www.evatronix.pl/products/docs.html?id=0&product=QzgwNTE=

C8051(VHDL).rar https://static.assets-stash.eet-china.com/album/old-resources/2009/2/10/c039355a-24f3-42c1-85f2-25ad10ee87b3.rar

参考资料：http://edacn.net/html/99/t-136399.html