lecture4_docstd

lecture4_docstd - Documentation Standards Z. Jerry Shi...

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1 Documentation Standards Z. Jerry Shi Computer Science and Engineering University of Connecticut Thank John Wakerly for providing his slides and figures. Documentation Standards • Specification • Block diagrams – First step in hierarchical design • Schematic diagrams • HDL programs (ABEL, Verilog, VHDL) • Timing diagrams • Circuit descriptions
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2 Block diagram Functional modules Inputs Outputs Internal datapath Control signals Flow of data and control should be clearly indicated Bus: a collection of two or more related signals Double or heavy lines Or INBUS[31. .0] Schematic diagrams • Details of component inputs, outputs, and interconnections • Reference designators – Specifies a particular instance of an IC, e.g., U12 • Pin numbers • Names for all signals • Page-to-page connectors Logic diagram does not give all the details
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3 Example schematic Flat schematic structure
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4 Hierarchical schematic structure Line crossing and connections Crossing Connection Connection
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lecture4_docstd - Documentation Standards Z. Jerry Shi...

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