Manchester Word Encoding

Figure 1-4.-Manchester encoding. through 6 are the decoded address bit, but it is not the a master clock pulse train. The clock pulse rate is 120 same configuration as the encoded word. Bit 7 is the tag bit and is always 1 in the decoded word. Bit 8 is the enter bit and is always 0 for the decoded words. The ICCG components process binary command and status words that cause changes in operation and display configuration. Word exchanges between components are done by binary word data encoded in Manchester format. Manchester Word Encoding The Manchester word format is a modification of the 36-bit encoded word generated in the components. This is done for transmission of the information from one component to another. The modification is accomplished by combining the basic 36-bit word with kHz, and the pulse width is 8.3 microseconds. Figure 1-4 shows a Manchester encoder equivalent circuit and its input and output signals. When both inputs to the first AND gate are 1, the Manchester word bit is also 1 for the 4.15-microsecond duration of the positive clock pulse. The resulting Manchester pulse occurs during the first half of the bit period. The output pulse of the first AND gate is applied to both the inverter input and the Manchester word output. The inverter produces a 0 output to keep the output of the second AND gate at 0, while a Manchester pulse is being produced. Since the clock pulse is negative during the second half of the bit period, the output of the second AND gate remains at 0. When the basic binary word bit at the first AND gate is 0 and the clock pulse is 1, the output of the first AND gate is 0. This causes the output of the inverter to be 1. 1-6