28128 Parallax Inc, 28128 Datasheet - Page 48

• Manufacturer Part Number: 28128
• Description: KIT BASIC ANALOG/DIGI PARTS ONLY
• Manufacturer: Parallax Inc

Specifications of 28128

• Accessory Type: ADC, DAC
• Product: Microcontroller Accessories
• For Use With/related Products: BASIC Stamp® 2 and Board of Education
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Questions
Challenge!
1. Determine the decimal equivalents of these binary numbers: 1010, 1111, 0010,
2. The command
3. Explain the difference between serial and parallel data.
4. Explain the difference between synchronous and asynchronous data
1. Program Listing 2.1 is used to count to three. Write a program that uses three
2. Modify Program Listing 2.2 so that it displays the clock pulses you apply to the
3. Modify Program Listing 2.2 so that it shifts the bits back out, displaying them
and 0100.
1. What command do you think would be used to shift the bits to the right? What
command would you use to shift the bits by, say, 3 to the left?
transmission.
parallel bits (use pin P2 for the third bit) and counts to 7. You can check your
work by connecting the input pin P2 to Vdd for a high signal and to Vss for a
low signal (using a 1 k resistor).
left pushbutton with the left LED.
with the right LED.
d = d<<1
was used to shift the bits in the variable
d
to the left by