MCX MicrocontrollersのトピックRe: how does lpc4337 work when XTAL_OSC_CTRL register BYPASS bit set 0 ?

how does lpc4337 work when XTAL_OSC_CTRL register BYPASS bit set 0 ?

jent — Thu, 25 Dec 2025 11:10:12 GMT

hello,master

how does lpc4337 work when XTAL_OSC_CTRL register BYPASS bit set 0 and XTAL1 connect with active oscillator, XTAL2 unconnected? Now the cpu works normally in this case.

bestwishes

jent

Re: how does lpc4337 work when XTAL_OSC_CTRL register BYPASS bit set 0 ?

Harry_Zhang — Mon, 29 Dec 2025 06:37:18 GMT

Hi @jent

It can “work” with BYPASS = 0 because the amplifier is being driven.

It’s better and safer to set BYPASS = 1 when using an external clock on XTAL1 and leaving XTAL2 open.

Harry