The S-5718 Series: Overview of the Mechanism
The S-5718 series uses a method that switches the detection mode between N pole detection, S pole detection, and omnipolar detection according to the voltage input to the SWP terminal of the Hall Effect Switch IC. Specifically, “H”, “L”, and “High-Z” of the SWP terminal are assigned to each detection pole. Controlling these levels by an output terminal of a microcontroller will allow the detecting pole to change so that it is possible to detect the different magnetic fields and polarities.
Adding a flow such as that shown in the illustration below to the Hall Effect Switch IC will allow the S-5718 distinguish the three different states: N pole, S pole, and no magnet. 
Additionally, with the S-5718 series, only a small change to the printed circuit board or just changing software settings will allow use for N pole detection, S pole detection, or omnipolar detection. Therefore, it would not be necessary to stock three different types of Hall Effect Switch ICs.
- S-5718 Series
Product brochure download 
COLUMN
- Vol.1 Do you know what it is? It is the secret to dramatically extending the battery life of wearable devices! (May 15, 2017)
- Vol.2 Self-current consumption of 260 nA achieved ── Ultra-High Efficiency Switching Regulator, Impact of S-85S1A (June 8, 2017)
- Vol.3 Innovation brought about by the collaborative creation with end users ── Ultrahigh-Efficiency Step-down Switching Regulator with a Supply Voltage Divided Output S-85S1P (June 27, 2017)
- Vol.4 The Age of the IoT ── Have you ever had problems detecting the movement of things? ～ Why are Hall Effect Switch ICs perfect for solving such problems? ～ (Dec. 07, 2017)
- Vol.5 The Transformation in IoT Devices brought about by Innovations in Hall Effect Switch ICs ── What is the impact of the S-5718, which can distinguish three states in one device? (Dec. 19, 2017)