Enabling/disabling input

The enabled OR - another type of gate that requires a minimum of three inputs -has just become available. Figure 15 shows the equivalent electronic representation, with the appropriate connection of AND and OR gates. In this context we note that the INHIBIT gate discussed in Section 11.10 also involves an enabling/disabling input. One strand of Pina, Maestri, and Balzani s novel exploitation of flavylium derivative photochemistry was briefly mentioned in Section 11.4. This AND logic system used protons and ultraviolet photons as the two inputs, to create a visible... 

Implementation User interface Disable/enable of input fields and buttons Normal... 

Exit Plotting Mode. When either plotting profiles or fining pinch points via mouse input, the user may click on this button to exit plotting mode. This button is disabled by default, but is enabled when the user needs to exit a mouse input method. 

Fire control receives instructions from the operators and information from the radars about any current threats. Using these inputs, fire control provides instructions to the launch station, which actually controls the launch of any interceptors. Fire control can enable firing, disable firing, and so forth, and, of course, it receives feedback from the launch station about the status of any previously provided control actions and the state of the system itself. The launch station controls the actual launcher and the flight computer, which in turn controls the interceptor hardware. 

State qualified triggering enables the oscilloscope to trigger on one source, such as the input signal itself, only after the occurrence of a specified logic pattern. The pattern acts as an enable or disable for the source. 

Timing through a latch is possible provided a timing arc exists between the latch data input and the latch state output. The basic approach is to disable the setup/hold timing relationship between the data input and the enable input of a latch. In order to time through all latches of a certain reference type in the technology library, the timing arc... 

This behavioural description requires the buffers contained within the BUFFERS block to enable and disable the input and output ports connecting die random sequence generator to die external bus. The code demonstrates another way of declaring and defining a procedure - bodi the procedure declaration and body are contained within the entity declarative part. 

When NEW SEED is low EXTJBUS is an input bus. The left bank of buffers is disabled to disconnect the output drive ftom EXTJBUS. The right bank is enabled and the incoming value on EXTJBUS is passed through to NEW.REG VALUE. 

INPUTS are ENABLED when positive, DISABLED when negative OUTPUTS are ASSERTED when positive, FALSE when negative... 

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