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RS Latch

RS Latch
RS Latch 256.png
RS Latch
Type

Multipart block

Physics

No

Transparency

Yes (partial)

Luminance

Yes, 7

Blast resistance

?

Tool

Any tool

Renewable

Yes

Stackable

Yes (64)

Flammable

No

Availability

Survival

First appearance

v4.0.0

Drops

Itself

Data value

dec: 12 hex: C bin: 1100

Multipart ID

pr_igate

The RS Latch, also known as the SR Latch, is a sequential logic gate with 4 inputs and 2 outputs. The name stands for Set Reset Latch. This is the fundamental gate used to create digital memory, as it can store the state of 1 bit (on or off).

Obtaining

Crafting

Ingredients Crafting recipe
Anode +
Cathode +
Conductive Plate +
Circuit Plate
AnodeCathodeConductive PlateConductive PlateCircuit PlateConductive PlateConductive PlateCathodeAnode
RS Latch


Usage

I/O

The RS Latch has 2 input and 4 outputs. When placed, on the ground, the left and right function both as inputs and outputs, while the front and back are just outputs. The left and right sides are the selectors while the front and back are state outputs.

Logic

The whole idea of the RS Latch is as follows. There are 2 states, each one consisting of a selector and a state output. The selectors control which of the 2 states is active. When a state is selected, its output will remain on until the other one is selected. Selecting the same state multiple times has no effect.

The RS Latch has 2 different modes. In mode 1, the selectors also function as state outputs, meaning that if their respective state output is active, they themselves will also emit a signal. In mode 2, the selectors do not function as state outputs.

Configuration

A shift-right-click with a screwdriver can change the settings on the gate. When placed, the RS Latch is on mode 1. The first click will flip which side (front or back) each selector input is tied to. A second click will change it to mode 2. A third click will flip mode 2. After that, it will reset to unflipped mode 1.

The four states of an RS Latch. The bottom ones are flipped. The 2 on the left are mode 1 while the 2 on the right are mode 2.

History

Version Changes
v4.0.0 Added the RS Latch.
v4.5.9 Fixed bug that caused the state to stick when in flipped modes

Issues

Issues pertaining to "RS Latch" are maintained on the ProjectRed Github page. Report issues there.