UG130 Datasheet, PDF (4/14 Pages) Silicon Laboratories – Si86xxT-EVB Users Guide

3. Hardware Setup and Demonstration
UG130: Si86xxT-EVB User's Guide
Hardware Setup and Demonstration
3.1 Powering the Supplies
Both sides of the Si8642ET isolator accept supplies between 2.5-5.5 V. See the figure below.
Perform the following steps to set up the Si864xxT-EVB:
• Remove all shunts.
• Power Side-A.
• Clip 5.0 V from the first power supply to TP1 (VDD1) and its GND to TP3 or TP5 (GND1).
• LED, D1, will light up, confirming power is supplied.
• Power Side-B.
• Clip 5.0 V from the second power supply to TP2 (VDD2) and its GND to TP4 or TP6 (GND2).
• LED, D2, will light up, confirming power is supplied.
Figure 3.1. EVB — Powered Up
3.2 DC Signal Demonstration
3.2.1 Defaults
The default output signal state of the Si8642ET is a logic High, meaning that with all shunts removed (EN1 and EN2 floating), all digital
inputs (A1, A2, B3, B4) and all digital outputs will (B1, B2, A3, A4) will be at their respective High voltage level. These values can be
measured and confirmed using the DMM.
• Remove all shunts.
• Measure with the DMM that all digital inputs (A1, A2, B3, B4) are logic High.
• Measure with the DMM that all digital outputs (B1, B2, A3, A4) are logic High.
See Figure 3.1 EVB — Powered Up on page 3.
silabs.com | Smart. Connected. Energy-friendly.
Rev. 0.1 | 3