SWRS226C February 2020 – December 2024 CC3230S , CC3230SF
PRODUCTION DATA
The device enters a brownout condition when the input voltage drops below Vbrownout (see Figure 7-4 and Figure 7-5). This condition must be considered during design of the power supply routing, especially when 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 condition. The resistance includes the internal resistance of the battery, the contact resistance of the battery holder (four contacts for 2× AA batteries), and the wiring and PCB routing resistance.
When the device is in HIBERNATE state, brownout is not detected. Only blackout is in effect during HIBERNATE state.
Figure 7-4 Brownout and Blackout Levels (1 of 2)
Figure 7-5 Brownout and Blackout Levels (2 of 2)In the brownout condition, all sections of the device (including the 32-kHz RTC) shut down except for the Hibernate module, 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 device are lost.
Table 7-3 lists the brownout and blackout voltage levels.
| CONDITION | VOLTAGE LEVEL | UNIT |
|---|---|---|
| Vbrownout | 2.1 | V |
| Vblackout | 1.67 | V |