常见问答
- M051 系列(95)
- M0518 系列(97)
- M0519 系列(43)
- M0564 系列(1)
- Mini51 系列(90)
- Nano100 / 102 系列(101)
- Nano103 Base 系列(10)
- Nano110 / 112 LCD 系列(100)
- Nano120 USB 系列(111)
- Nano130 USB+LCD 系列(110)
- NUC029 系列(94)
- NUC100 / 200 系列(102)
- NUC120 / 122 / 123 / 220 USB 系列(116)
- NUC121/125 系列(1)
- NUC126 USB 系列(2)
- NUC130 / 230 CAN 系列(103)
- NUC131/NUC1311 CAN 系列(98)
- NUC140 / 240 USB+CAN 系列(114)
- M451 Base 系列(118)
- M451M 系列(117)
- M452 USB 系列(130)
- M4521 USB 系列(1)
- M453 CAN 系列(128)
- M463 CAN FD/USB HS 系列(1)
- M467 Ethernet/Crypto 系列(1)
- M471 系列(1)
- M479 Motor Control Series(1)
- M481 Base 系列(4)
- M482 USB FS OTG 系列(4)
- M483 CAN 系列(4)
- M484 USB HS OTG 系列(4)
- M485 Crypto 系列(4)
- M487 Ethernet 系列(4)
- M4TK 触摸 IC 系列(25)
- NUC442 / 472 系列(130)
- NUC472 Series(1)
- NUC505 系列(138)
产品
功能
+
FAQ
Can the input voltage of GPIO pins with analog functions (e.g. ADC, DAC, and ACMP) be higher than AVDD? Issue Date:2016-06-27
To avoid the influence of internal analog circuit signals, the input voltage of the GPIO pins with analog functions, even no analog function is selected, could not be higher than AVDD. Otherwise, it will cause unpredictable errors.
For example, in the M051 series:
If the Config bit is set to 2.2V Brown-out detection and Brown-out reset, as shown below.
At this time, if P1.0 (with ADC channel 0 function) is set to GPIO, but the input voltage is higher than AVDD, the analog circuit voltage may increase, causing misjudgment of the Brown-out detection and the occurrence of the reset.
Products: | Microcontrollers ,Arm Cortex-M0 MCUs ,Arm Cortex-M4 MCUs |
---|---|
Applications: | |
Function: | Peripherals,I/O,GPIO |