LAB 3

Use your ETS-7000 logic trainers for these activities....

Finish any unfinished activities from Lab 2 first.

Wire DATA SWITCHES to input of 74LS244 gates. Use PULSE SWITCHES to enable outputs. Each PULSE SWITCH is used to enable a bank of 4 gates. Wire LED DISPLAY to output of 74LS244.
Show your instructor.

2. Static test of 2532 EPROM --

Pupose of this test is to retrieve commands/data from the EPROM at specific points in memory.
Verify the program entered into the EPROM in an earlier lab using switches and lights on your trainer board. Wire the low 8 address lines to the DATA SWITCHES. Wire the high 4 address lines to ground. Wire the 8 data lines to the LED DISPLAY on the trainer board. Figure out what to do with pins 20 and 21 of the EPROM by reading the datasheet. Verify the first 10 locations of the EPROM. (Don't forget to power the EPROM -- Vcc is +5V and Vss is ground.) Leave circuit together for next step.

Pupose of this test is display hex commands retrieved from the EPROM
Wire up both TIL 311 displays to the 2532. Wire the TIL inputs to the data lines of the 2532. Wire the LATCH STROBE to a PULSE SWITCH. Figure out what to do with the blanking input. Test that you can cause the TIL displays to display the program in the EPROM.
NOTE: The wiring diagram on the datasheet is a BOTTOM VIEW -- CAREFUL.
ALSO DO NOT WIRE UP THE LEFT OR RIGHT DECIMAL POINT (pins 4 and 10) -- If you want to learn about the decimal points ask your instructor.

Wire DATA SWITCHES to inputs of the 8 flip-flops. Wire the eight outputs to the LED DISPLAY on the trainer board. Use PULSE SWITCHES to drive latch and output enable. Test the concept of latching data.

5. Wire up and test (using oscilloscope) the Crystal Clock.

Call Lab Instructor or TA over and tell him/her the frequency of the clock using the oscilloscope.

NOTE: Tool box check at the end of next lab. Must pass check before receiving new set of parts