4 ATA8352 UWB Power-Up

The ATA8352 UWB device is powered via the ATSAMC21-XPRO (host MCU) board. The host controller ATSAMC21-XPRO board could be powered either with a mini USB cable from a DC power supply (or battery), or a personal computer through a USB Debug port. The LED labeled POWER on the host MCU board will illuminate green, when power is supplied to the board.

The host MCU board has a 3-pin header labeled VCC_SEL on the board. This header can be used to select between 3.3V and 5.0V as the supply voltage for the ATSAMC21J18A, peripherals and extension headers by placing a jumper on pin 1-2 or pin 2-3, respectively. This jumper must always be set on 3.3V to avoid any damage on the ATA8352 UWB device.

Note: For more information about the power-up, DC/DC converter schematic of host MCU board and UWB module, refer to the ATA8352 Demo and Evaluation Kit User Guide and the AT6491 Getting Started with SAM C21 SMART ARM Based Microcontroller Application Note.