Computer Platforms Research Paper Example | Topics and Well Written Essays - 1250 words

Computer Platforms - Research Paper ExampleA binary program input of 0100 would wanton four LEDs in a row whilst a binary input of 0101 would argus-eyed five LEDs in a row. Derive the truth-table for a 4 morsel input/ 16 while output decoder which would be used to power this elongate display.Solution Let x1, x2, x3, x4, x5, x6, x7, x8, x9, x10, x11, x12, x13, x14 and x15 represent the linear array of LEDs. Let A, B, C and D represent the binary input terminals. The truth-table for the linear display is shown in Figure 2.2.... Table 2.1 gives details as to which segments should be energised to display various decimal values at the 4-pin input. DecimalABCDSegments00000a, b, c, d, e, f10001b, c20010a, b, g, e, d30011a, b, c, d, g40100b, c, f, g50101a, c, d, f, g60110c, d, e, f, g70111a, b, c81000a, b, c, d, e, f, g91001a, b, c, f, gTable 2.1 Truth-table for BCD-to-seven-segment decoderHence we can arrive at expressions for each segment, as followsa = ABCD + ABCD + ABCD + ABCD + ABCD + ABCD + ABCDb = ABCD + ABCD + ABCD + ABCD + ABCD + ABCD + ABCD + ABCDc = ABCD + ABCD + ABCD + ABCD + ABCD + ABCD + ABCD + ABCD + ABCDd = ABCD + ABCD + ABCD + ABCD + ABCD + ABCDe = ABCD + ABCD + ABCD + ABCDf = ABCD + ABCD + ABCD + ABCD + ABCD + ABCDg = ABCD + ABCD + ABCD + ABCD + ABCD + ABCD + ABCD2.b A display composed of a linear array of LEDs, is to respond to a 4-bit binary input which is myrmecophilous on the absolute binary value by lighting each successful element. A binary input of 0100 would light four LEDs in a row whilst a binary input of 0101 would light five LEDs in a row. Derive the truth-table for a 4 bit input/ 16 bit output decoder which would be used to power this linear display.Solution Let x1, x2, x3, x4, x5, x6, x7, x8, x9, x10, x11, x12, x13, x14 and x15 represent the linear array of LEDs. Let A, B, C and D represent the binary input terminals. The truth-table for the linear display is shown in Figure 2.2.Table 2.2 Truth-table for LEDs of linear display 3.a The decimal number 101 may be delineated in binary as 01100101. Using Ones