CC3220MOD_017 Datasheet, PDF (39/100 Pages) Texas Instruments – SimpleLink Wi-Fi CERTIFIED Wireless MCU Modules

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CC3220MOD, CC3220MODA
SWRS206B – MARCH 2017 – REVISED AUGUST 2017
5.7 Brownout and Blackout Conditions
The module enters a brownout condition whenever the input voltage dips below V_BROWNOUT (see Figure 5-
4 and Figure 5-5). 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.
NOTE
When the module is in HIBERNATE state, brownout is not detected. Only blackout is in
effect during HIBERNATE state.
Figure 5-4. Brownout and Blackout Levels (1 of 2)
Figure 5-5. Brownout and Blackout Levels (2 of 2)
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_brownout = 2.1 V and V_blackout = 1.67 V
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Specifications
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