CC3100_15 Datasheet, PDF (9/44 Pages) Texas Instruments – CC3100 SimpleLink Wi-Fi Network Processor, Internet-of-Things Solution for MCU Applications

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CC3100
SWAS031D – JUNE 2013 – REVISED FEBRUARY 2015
4.5 Brown-Out and Black-Out
The device enters a brown-out condition whenever the input voltage dips below V_BROWN (see Figure 4-1 and
Figure 4-2). 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) cause a dip in the supply voltage, potentially
triggering a brown-out. The resistance includes the internal resistance of the battery, contact resistance of the
battery holder (4 contacts for a 2 x AA battery) and the wiring and PCB routing resistance.
Figure 4-1. Brown-Out and Black-Out Levels (1 of 2)
Figure 4-2. Brown-Out and Black-Out Levels (2 of 2)
In the brown-out condition, all sections of the device shut down except for the Hibernate module (including the
32-kHz RTC clock), which remains on. The current in this state can reach approximately 400 µA.
The black-out condition is equivalent to a hardware reset event in which all states within the device are lost.
Table 4-1 lists the brown-out and black-out voltage levels.
V_brownout
V_blackout
CONDITION
Table 4-1. Brown-Out and Black-out Voltage Levels
VOLTAGE LEVEL
2.1
1.67
UNIT
V
V
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