ModuleWare Reference Guide - Hornad

Bit Manipulation PartsN-Bus Merge (merge)Table 5-3. N-Bus Merge Truth Table — Two-Busdin1 din0 dout0001 000 0010000010 110 0101100100 000 1000001001 010 001010Truth Table (4-Bus examples)Example merging 2-bit buses din3, din2 and din1 with 1-bit bus din0 into 7-bit bus dout:Table 5-4. N-Bus Merge Truth Table — Four-Busdin3 din2 din1 din0 dout00 01 00 0 000100000 10 11 0 001011001 00 00 0 010000010 01 01 1 1001011Example merging 2-bit buses din3, din2 and din1 with 1-bit bus din0 into 8-bit bus doutshowing how the undefined bit in dout is filled with an X:Table 5-5. N-Bus Merge Truth Table — Four-Busdin3 din2 din1 din0 dout00 01 00 0 X000100000 10 11 0 X001011001 00 00 0 X010000010 01 01 1 X1001011Example merging 2-bit buses din3, din2 and din1 with 1-bit bus din0 into 6-bit bus doutdiscarding the highest bit in din3:Table 5-6. N-Bus Merge Truth Table — Four-Busdin3 din2 din1 din0 dout00 01 00 0 00100000 10 11 0 01011001 00 00 0 10000010 01 01 1 001011ModuleWare Reference Manual, Library Version 1.9 83September 18, 2008