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Bachelor's Degree in Telecommunications Systems and in Network Engineering |
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Chapter 3 problems |
- B3.2 - |
9's complementer for BCD arithmetic operations (μC - C) |
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1. Specifications
Design a 9's complementer circuit (9C) type MC14561 as shown in Fig. 1.
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Fig.2. Our Nine_C circuit symbol and truth table. |
The same project is proposed in D1.2 as a combinational circuit based on logic gates.
Pin assignment option #1:
| A(3..2) ---> RC(7..6) | A(1..0) ---> RB(5..4) | |
| Comp ---> RA3 | Z ---> RA1 | |
| F(3) ---> RC3 | F(2..0) ---> RE(2..0) |
Pin assignment option #2:
| A(3..2) ---> RA(5..4) | A(1..0) ---> RB(7..6) | |
| Comp ---> RA1 | Z ---> RB3 | |
| F(3) ---> RC5 | F(2..0) ---> RD(7..5) |
Pin assignment option #3:
| A(3..2) ---> RB(6..5) | A(1..0) ---> RC(3..2) | |
| Comp ---> RA4 | Z ---> RB7 | |
| F(3) ---> RC7 | F(2..0) ---> RD(3..1) |
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