FAQ

FAQ

Is the external crystal ( HXT ) voltage of the M480 series and M451 series limited by 0.3VDD and 0.7VDD, the same as the external clock source voltage?  Issue Date:2018-09-03

The external crystal ( HXT ) voltage of the M480 series and M451 series is different from the external clock source voltage. There are two specifications as described below: 

1. The following table shows the specifications of the HXT voltage, which is an internal digital signal, independent of 0.7 VDD.

  • M480 Series

  • M451 Series

2. The external clock source can be high level and low level according to the state of the I / O; thus, there is a limit of 0.3 VDD and 0.7 VDD.

The external clock source limits of the M480 series and M451 series are the same.

Products: Microcontrollers ,Arm Cortex-M4 MCUs ,M451 Base Series ,M451M Series ,M452 USB Series ,M453 CAN Series ,M481 Base Series ,M482 USB FS OTG Series ,M483 CAN Series ,M484 USB HS OTG Series ,M485 Crypto Series ,M487 Ethernet Series
Applications:
Function: Peripherals,Clock Control,HXT,LXT