Question

5.3 SYNCHRONOUS COUNTER DEVICE 74LS163 Test the operation of a 74LS163 four bit synchronous binary counter Load the device with parallel data Examine and understand the RCO output signal of the counter device. ОBJEСТIVE: A C REFERENCE: Manufactures data sheets COMPONENTS: 1 x IC 74LS163 EQUIPMENT: Development board Logic probe Mult-meter INSTRUCTIONS: Connect the IC up so that it will count from 0 to 15 in binary. Connect the four Q outputs to the LED's on the development boards with the LSB on the right hand side. 1. 2 Apply a 1 Hz clock to the clock input of the IC. 3. Coanect the RCO outpur to your loose Green LED Examine the LED connected to the Q outputs over the full terminal count 4, QUESTIONS: Is your circuit counting correctly ? 1. When does the Green LED turn an 2. How many counts does the counter count to 7 3. If we want to let the counter not count to its full terminal count, but only 10 counts, what value 4. must we load the counter to achieve this ? After you have determined this value, load it into your counter device and see if you get the correct number of counts. Use a switch SI for the load signal and switches S2 to S5 to input the new values. 5. Does the RCO signal (Green LED) still appear at the count ? 6. DIGITAL SYSTEMS $2 PAGE 14 PRACTICAL ASSIGNMENTS