JAJSIK6C February 2020 – December 2024 CC3235MODAS , CC3235MODASF , CC3235MODS , CC3235MODSF
PRODUCTION DATA
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The module enters a brownout condition whenever the input voltage dips below VBROWNOUT (see Figure 7-4 and Figure 7-5). 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.
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 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. Vbrownout = 2.1 V and Vblackout = 1.67 V
Table 7-5 lists the brownout and blackout voltage levels.
| CONDITION | VOLTAGE LEVEL | UNIT |
|---|---|---|
| Vbrownout | 2.1 | V |
| Vblackout | 1.67 | V |