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Question 7.7: Construct a MOD-10 counter that will count from 0000 (zero) ...

Construct a MOD-10 counter that will count from 0000 (zero) through 1001 (decimal 9).

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2^{3} = 8 and 2^{4} = 16; thus, four FFs are required. Because the counter is to have stable operation up to the count of 1001, it must be reset to zero when the count of 1010 is reached. Therefore, FF outputs D and B must be connected as the NAND gate inputs. Figure 7-8(b) shows the arrangement.

Capture7-6

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