Digital Systems: Principles and Design

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Digital Systems

TABLE 12.4

Relative address Character ASCII Coded eight inputs for Segment numbers = {fuse link

in ASCII Table eight characters welcome numbers with respect to the

(Relative Address + Base address)

´ 16)} for 8 rows for eight

characters welcome

87 W 01010 111 8, 7, 12, 14, 4, 3

101 e 01100 101 15, 10, 1, 8, 7, 6

108 l 01101 100 10, 13

99 c 01100 011 1, 8, 7, 6

111 o 01101 111 15, 7, 6, 13

109 m 0 1 1 0 1 1 0 1 7, 15, 13, 16, 4

101 e 01100 101 15, 10, 1, 8, 7, 6

32 Space 00100 000 None

How will you design a circuit for continuously incremental display from 000 to 999 at regu-

lar intervals?

Solution

Figure 12.16 shows a circuit using PROM to ...