Electrical Digital Components
This library contains electrical digital components based on the VHDL standard with 9-valued logic and conversion to 2-valued logic.
Digital SignalsSubpackages
<Text-field style="Heading 2" layout="Heading 2" bookmark="bkmrk0">Digital Signals</Text-field>
Digital signals are usually considered to be discrete values such as logic 1 or 0; however, the drive strength (none, weak, or strong) and unknown values of a signal may also be considered. The following table gives the integer values used for each of the nine states. When a digital signal is plotted, the vertical-axis corresponds to these integer codes. For example, a digital signal that steps from a forcing 0 to a forcing 1 has a plot that steps from 3 to 4.
StateInteger Meaning'U'1Uninitialized'X'2Forcing unknown'0'3Forcing 0'1'4Forcing 1'Z'5High impedance'W'6Weak unknown'L'7Weak 0'H'8Weak 1'-'9Do not care
<Text-field style="Heading 2" layout="Heading 2" bookmark="bkmrk1">Subpackages</Text-field>
The following subpackages are available
Common - common digital gates
Ideal Gates - standard logic gates with no delays
Gates with Delay - standard logic gates with delays
Delay Components - components that delay a signal
Converters - converters between 2-valued and 9-valued logic
Registers - edge-triggered flip-flops and level-sensitive latches
Sources - digital sources
Tristates - transfer-gates and Wired X
See AlsoElectrical Library Overview