Read for Dec.6:

Horowitz:  Sec. 9.02;  9.04-07 (driving digital inputs);  9.15-21 (DAC/ADC);  9.27-28 (PLL).
Hayes and Horowitz:  pp. 406-415 (ADC).

Exercises  9.2 (p.614),  9.3.
Add. Exer. 2 (p.668).

    Note: Add today's circuits to your 'private breadboard', as you will need them for several lab periods.

                              [Keypad circuit: See Hayes and Horowitz, p. 372-4.]

16.1         Data buffer and RAM

1. The address bus is the counter output = display input. Use the 13 lowest bits (A0-A12) to address the memory.
2. The data bus is new. Use only two, not four, addditional displays here. See the circuit diagram on p. 444 of Hayes & Horowitz for how this fits together. (We will not get to the part inside the heavy line - CPU, etc.)

17.1        DAC. Use the data bus for digital input, and check operation using the keypad and a voltmeter.
                           Record enough data to check the linearity of the conversion.

(A)*       Sinewave generator.

Program an offset sinewave (in effect, sin² ) into the memory, from the keypad. Use about 16 points per cycle; then, if it works, maybe try a larger number(like 32+/-1)  to get a better waveform.   Make it generate a continuous sine²wave output (This may require some minor changes in the gating circuitry).
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* Additional instructions on a handout in lab.