topic 2V Supply Voltage for LPC546xx in LPC Microcontrollers

2V Supply Voltage for LPC546xx

tiennguyen — Wed, 25 Sep 2019 10:46:52 GMT

Hi All,

This is the first time I use LPC546xx.

My system uses USB High-Speed then I have to use USB1. I must use 2V for VDD.

The question: Can I use 3.3V for USB1_AVDD3V3, USB1_AVDDTX3V3 and 2V for VDD, VDDA, VBAT, Vrefp?

If yes, is there any note that I must consider?

Thanks in advance!

Re: 2V Supply Voltage for LPC546xx

soledad — Wed, 25 Sep 2019 20:53:56 GMT

Hi,

For USB full-speed it is necessary VDD=3v min for operation while USB1_AVDD3V3 and USB1_AVDDTX3V3 are at 3.3V, for USB high-speed it is necessary VDD=1.71v min while USB1_AVDD3V3 and USB1_AVDDTX3V3 are at 3.3V.

Have a nice day!

Regards

Soledad

Re: 2V Supply Voltage for LPC546xx

tiennguyen — Thu, 26 Sep 2019 03:06:37 GMT

Hi Soledad,

Thanks for your confirmation.

Best Regards,