Brownout And Blackout Conditions - Texas Instruments SimpleLink CC3220MOD Series Manual

CC3220MOD, CC3220MODA
SWRS206E – MARCH 2017 – REVISED MAY 2021

8.7 Brownout and Blackout Conditions

The module enters a brownout condition whenever the input voltage dips below V
Figure 8-5). This condition must be considered during design of the power supply routing, especially if operating
from a battery. High-current operations, such as a TX packet or any external activity (not necessarily related
directly to networking) can cause a drop in the supply voltage, potentially triggering a brownout. The resistance
includes the internal resistance of the battery, contact resistance of the battery holder (four contacts for a 2× AA
battery), and the wiring and PCB routing resistance.
When the module is in HIBERNATE state, brownout is not detected. Only blackout is in effect during
HIBERNATE state.
In the brownout condition, all sections of the device shut down within the module except for the Hibernate block
(including the 32-kHz RTC clock), which remains on. The current in this state can reach approximately 400 µA.
The blackout condition is equivalent to a hardware reset event in which all states within the module are lost.
V = 2.1 V and V
brownout blackout
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Note
Figure 8-4. Brownout and Blackout Levels (1 of 2)
Figure 8-5. Brownout and Blackout Levels (2 of 2)
= 1.67 V
Product Folder Links: CC3220MOD CC3220MODA
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(see Figure 8-4
BROWNOUT
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