0.1 R
V
Hardware Description
12
SWRU457A – February 2017 – Revised August 2018
Copyright © 2017–2018, Texas Instruments Incorporated
CC3120 SimpleLink™ Wi-Fi
®
BoosterPack™ Plug-In Module and IoT
Solution
2.5.2
Active Current Measurement
To measure active current in a profile form, TI recommends using a 0.1-
Ω
1% resistor on the board, and
measuring the differential voltage across the resistor. This measurement can be done using a voltmeter or
an oscilloscope for measuring the current profile.
Figure 10. Active Current Measurement
2.6
Clocking
The board provides two crystals for the clocks to the device:
•
Y1 is a 40-MHz crystal.
•
Y3 is a 32-kHz crystal used as a sleep clock.
The 32-kHz crystal (Y3) allows for lower LPDS sleep currents than other low-frequency clock sources. The
presence of the crystal allows use of the full range of low-power modes.
