19.1] A signal rx_bus is declared to be a bus-kind signal of type std_logic. Trace the value of the signal as transactions from the following two drivers are applied: • null, ‘0’ after 10 ns, ‘1’ after 20 ns, ‘0’ after 30 ns, null after 40 ns • null, ‘1’ afte...
You can easily verify this using the timing diagram shown above: when clock and data are at the same logic level, the Manchester signal is low; when they’re at different logic levels, the Manchester signal is high. The reason that this is a more “theoretical” implementation is ...
TABLE 1 Generate Value fromPropagate Value from Input AInput Blogical AND functionLogical OR function 0000 0101 1001 1111 The inputs are also applied to an eXclusive-OR gate (XOR)108. That is, the inputs operate as a sum operand at the XOR gate108. The other sum operand is from logical...