KIT33978EKEVB / KIT34978EKEVB Evaluation Board User's Guide
User guide for NXP KIT33978EKEVB evaluation boards featuring the MC33978 22-channel switch detection interface with programmable wetting current and SPI connectivity.
Overview
This technical user guide provides a detailed overview of the KIT33978EKEVB and KIT34978EKEVB evaluation boards, designed for testing the MC33978 and MC34978 22-channel switch detection interface ICs. The document covers hardware configuration, including the 24-to-1 analog multiplexer and programmable wetting currents. It provides instructions for using the SPIGen graphical user interface for SPI communication, alongside complete circuit schematics, PCB layout diagrams, and a full bill of materials. These boards support automotive and industrial switch monitoring applications with low-power sleep modes.
Use Cases
- Automotive switch monitoring
- Industrial control systems
- Battery-powered switch state detection
- Body control modules
- Analog signal multiplexing
Topics
Referenced Parts
MC33978
NXP
The KIT33978EKEVB and KIT34978EKEVB Evaluation Board (EVB) features the MC33978 / MC34978 - 22 Channel Switch Detection Interface
MC34978
NXP
The KIT33978EKEVB and KIT34978EKEVB Evaluation Board (EVB) features the MC33978 / MC34978 - 22 Channel Switch Detection Interface
MC68HC908JW32
NXP
parallel ports built into Freescale’s MC68HC908JW32 microcontroller
NCV8664
Diodes
MC34978EK (2) | 2 1 U4 32 V Varistor CN1812 (3) | 3 1 U5 - 3.3 V or 5.0 V LDO - SOT223 NCV8664 (3) | Diodes | 4 1 D1 - RECTIFIER, FAST, 3 A, 50 V,
| MC33978EK | NXP | MC33978EK |
| MC33978 | NXP | The KIT33978EKEVB and KIT34978EKEVB Evaluation Board (EVB) features the MC33978 / MC34978 - 22 Channel Switch Detection Interface |
| MC34978 | NXP | The KIT33978EKEVB and KIT34978EKEVB Evaluation Board (EVB) features the MC33978 / MC34978 - 22 Channel Switch Detection Interface |
| MC68HC908JW32 | NXP | parallel ports built into Freescale’s MC68HC908JW32 microcontroller |
| NCV8664 | Diodes | MC34978EK (2) | 2 1 U4 32 V Varistor CN1812 (3) | 3 1 U5 - 3.3 V or 5.0 V LDO - SOT223 NCV8664 (3) | Diodes | 4 1 D1 - RECTIFIER, FAST, 3 A, 50 V, |