Digital Systems: Principles and Design

266

Digital Systems

Write ASCII codes for nineteen characters in Digital Electronics.

Solution

Using Table 11.2, we get the following answer:

100 0100; 110 1001; 110 0111; 110 1001; 111 0100; 110 0001; 110 1100; 010 0000;

100 0101; 110 1100; 110 0101; 110 0011; 111 0100; 111 0010; 110 1111; 110 1110; 110

1001; 110 0011; 111 0011.

EXERCISES

1. Using Equations (11.2), (11,3), (11.4) and (11.5), give the BCD format codes 8421,

7536, 2421 and 5421, respectively for the following decimal numbers in Table 11.9,

Verify your answers for each column.

TABLE 11.10 A Four-bit digital comparator for sample bits for binary numbers A and B

Inputs Outputs

Input A Input ...