071008  rev. 9-24-09

gj05-09 Octave Shifter and Blocks
20 points
OEES 235

Back to Main Page

  1. Create a new folder (gj05_09) on your flash drive (or wherever) for this project.
  2. In Windows Explorer, copy the following files into the gj05_09 folder:
    • The schematic file from the gi21_13 Tone Translator Up Counter project.
    • The schematic file from the gj01_10 Improved Timing Circuit project.
  3. Open Lever, and start a new project whose files will be kept in the gj05_09 folder.
    • Use gj05_09 as the file name.
  4. With the device number (LC4256ZC-45T100C) highlighted, Use Source, Import to import the gi21_13 and gj01_10 schematics.
  5. Highlight the gi21_13 schematic, and in the other window double-click Generate Schematic Symbol.
  6. Do the same for the gj10_10 schematic.
  7. Double-click gi21_13 (in the Sources in Project Window) to open it into the schematic editor.
  8.  If the CD input at the bottom of the CBU14 counter doesn't have an input pin titled LDOUTCNT, create this input pin and connect it to CD.
  9. Click File, Matching Symbol and then save the schematic.
  10. Click Window, Library Manager.
  11. In the Library Manager window, click File, Open Folder and choose the gj05_09 folder.
  12. Open the schematic editor.
  13. In the Drawing Toolbar, click the Add Symbol icon.
  14. In the top list box, if Local isn't already highlighted, highlight it.
  15. In the bottom list box, click the gi21_13 symbol and place it in the schematic's work area.
  16. Do the same for the gj10_10 symbol.
  17. Increase the size of the drawing area by clicking File, Sheets, Resize, D -34.00" 22.00"
  18. Connect up the circuit as shown in the schematic below.
  19. The SRRL4 macro is a right/left shift register. For information on how it works, go to the Reference Material for Lever Macros page to find out how to use the Macro Library Reference Manual (part of the Lever help utility that resides on your hard drive). Your job is to add a couple of gates and connect some wires to provide inputs to shift register pins RL, LD, and EN so that the entire circuit will produce the waveforms shown at the bottom of this Web page. 
    • Hint, you'll need to use the OCTUP and OCTDN input pins as inputs to some of these gates.
    • When OCTAVE is high, and either OCTUP or OCTDN is high, the shift register should shift in the appropriate direction.
    • If OCTUP is high, the shift register should shift in a direction that will produce a tone translator output frequency that is twice as high as the input frequency from the microphone.
    • Likewise, OCTDN should make the frequency half as high as the input frequency.
  20. Right click here to get the test vector file, and then choose Save As.
 













Back to Main Page
1