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README.md: Document the meaning of mem_instr

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Jonathan Neuschäfer 2016-04-03 15:03:45 +02:00
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@ -297,7 +297,8 @@ that can run one memory transfer at a time:
The core initiates a memory transfer by asserting `mem_valid`. The valid
signal stays high until the peer asserts `mem_ready`. All core outputs
are stable over the `mem_valid` period.
are stable over the `mem_valid` period. If the memory transfer is an
instruction fetch, the core asserts `mem_instr`.
#### Read Transfer