Library Reference

A Logisim library holds a set of tools that allow you to interact with a circuit via clicking and dragging the mouse in the canvas area. Most often, a tool is intended for adding components of a particular type into a circuit; but some of the most important tools, such as the Poke Tool ( ######### ) and the Select Tool (), allow you to interact with components in other ways.

Frequently, when the component is selected or added, Alt-0 to Alt-9 is used to change its Data Width attribute. Quick use of the keys allows the entry of larger values, for example: ALT-1 ALT-2 donne 12.

All of the tools included in Logisim's built-in libraries are documented in this reference material.

Wiring library

		Splitter
		Pin
		Probe
		Tunnel
		Pull Resistor
		Clock
		Power on Reset
		Constant
		Power/Ground
		Do not connect
		Transistor
		Transmission Gate
		Bit Extender

Gates library

IEC ANSI
		NOT Gate
		Buffer
		AND/OR/NAND/NOR Gate
		XOR/XNOR/Odd Parity/Even Parity Gate
		Controlled Buffer/Inverter
		Programmable logic array

Plexers library

		Multiplexer
		Demultiplexer
		Decoder
		Priority Encoder
		Bit Selector

Arithmetic library

		Adder
		Subtractor
		Multiplier
		Divider
		Negator
		Comparator
		Shifter
		Bit Adder
		Bit Finder

Floating Point Arithmetic library

		Floating Point Adder
		Floating Point Subtractor
		Floating Point Multiplier
		Floating Point Divider
		Floating Point Negator
y^x		Floating Point Exponentiator
log		Floating Point Logarithm
√		Floating Point Square Root
\|x\|		Floating Point Absolute
≶		Floating Point Comparator
min/max		Floating Point Minimum and Maximum
round		Floating Point Round
sin/cos		Floating Point Trigonometry
class		Floating Point Classificator
FP→FP		Floating Point Converter
FP→I		Floating Point to Integer
I→FP		Integer to Floating Point

Memory library

		D/T/J-K/S-R Flip-Flop
		Register
		Counter
		Shift Register
		Random
		RAM
		ROM
		Dual Port RAM

Input/Output library

		Button
		Dip Switch
		Joystick
		Keyboard
		LED
		LED Bar
		Real-Time Clock
		Matrix Keypad
		RGB LED
		7-Segment Display
		Hex Digit Display
		LED Matrix
		TTY
		Port I/O
		Repetar Local Bus
		RGB Video