TimeGen Timing Diagram Editor: Quick Start Guide TimeGen is a specialized CAD tool designed to help digital engineers, system architects, and technical writers create professional, publication-quality timing diagrams quickly. Unlike generic drawing tools, TimeGen understands the relationships between clocks, signals, and buses, automating the alignment process. This guide will walk you through the essential steps to create your first timing diagram. Interface Overview
The TimeGen user interface is built for speed and efficiency, consisting of three main areas:
Menu and Toolbar: Located at the top, providing quick access to file management, export options, and signal manipulation tools.
Diagram Canvas: The main area where your timing waveforms are visually rendered in real time.
Signal Properties Panel: Usually positioned at the bottom or side, allowing you to type, edit, and fine-tune signal attributes, delays, and text labels. Step 1: Adding and Configuring Clocks
Every digital timing diagram typically starts with a reference clock. TimeGen makes generating uniform clock signals effortless. Click the Add Clock button on the main toolbar. In the properties panel, define the clock attributes: Name: Label your clock (e.g., SYS_CLK). Frequency/Period: Set the cycle duration. Duty Cycle: Adjust the high-to-low ratio (default is 50%).
Initial State: Choose whether the clock starts on a rising edge or a falling edge.
TimeGen automatically draws a perfect, continuous square wave across the length of your diagram based on these parameters. Step 2: Creating Signals and Buses
Once your clock is set up, you can add data lines, control lines, and multi-bit buses.
Click Add Signal for a single-bit wire (like an enable line) or Add Bus for multi-bit data paths (like an address bus).
Highlight a specific time segment on the waveform canvas by clicking and dragging your mouse.
Change the state of the selected segment using the toolbar shortcuts or keyboard hotkeys: H for High L for Low
V for Valid Data (creates the cross-hatched hexagon pattern for buses) X for Don’t Care / Invalid Data Z for High Impedance (tri-state) Step 3: Adding Delays and Annotations
To make your diagram informative for data sheets or design reviews, you need to show precise relationships, such as setup times, hold times, and propagation delays. Timing Arrows Select the Arrow Tool from the toolbar.
Click the causal edge (e.g., a rising clock edge) and drag the mouse to the resulting edge (e.g., valid data on a bus).
Double-click the newly created arrow to add a text label, such as t_su (setup time) or t_pd (propagation delay). Text Labels and Markers
State Text: Click inside a valid bus segment to type specific hex values (e.g., 0x7F, ADDR_A).
Vertical Markers: Add vertical dashed lines across all signals to slice the diagram into distinct clock cycles or functional phases (e.g., Phase 1: Fetch, Phase 2: Decode). Step 4: Exporting Your Diagram
TimeGen allows you to easily move your finished diagram into documentation software like Microsoft Word, LaTeX, or Adobe FrameMaker. Go to File > Export or use the export icons on the toolbar. Choose your preferred format:
Vector Formats (EMF/WMF/SVG): Best for documentation, as they scale infinitely without losing sharpness or pixelating.
Raster Formats (PNG/BMP): Ideal for quick web sharing or presentation slides.
Alternatively, use the Copy to Clipboard feature to instantly paste the diagram directly into an open document. Essential Shortcuts for Efficiency
Mastering these quick keys will drastically cut down your diagram drawing time: Add New Signal Ctrl + N Set State to High 1 or H Set State to Low 0 or L Insert Bus Hex Value Double-Click Segment Zoom In / Out Ctrl + Mouse Wheel To tailor the next steps for your document, tell me:
What specific feature (like text styles, complex grids, or invalidation states) do you want to expand on?
Leave a Reply