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FAQ
What module does the VBAT pin primarily supply power to? Issue Date：2016-08-29
The VBAT pin primarily supplies power to the RTC module and external low-speed oscillator (LXT), as shown below:
If the RTC module is not supplied power by VBAT, its status is uncertain, causing power consumption and affecting the performance of standby power. LXT cannot be used as well because there is no power supply. When calling CLK_WaitClockReady to check if the LXT function is stable during programming, it will get stuck and cannot continue.
| Products: | Microcontrollers ,Arm Cortex-M0 MCUs ,NUC100/200 Advanced Series ,NUC120/122/123/220 USB Series ,NUC130/230 CAN Series ,NUC131/NUC1311 CAN Series ,NUC140/240 Connectivity Series ,Arm Cortex-M4 MCUs ,M451 Base Series ,M451M Series ,M452 USB Series ,M453 CAN Series ,M4TK Touch Key Series ,NUC442/472 Series ,NUC505 Series |
|---|---|
| Applications: | |
| Function: | Peripherals,Clock Control,LXT,Timer and PWM,RTC |