You are reading a single comment by @jlawson and its replies.
Click here to read the full conversation.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@jlawson
With 1v87 it appears that holding my finger on the crystal leads actually STOPS the LSE from starting up, possibly because it does not detect the crystal.
With 1v88 it seems to detect the crystal and attempts to use the LSE even though it hasn't started up.
Checked with peek32(0x40021020), RCC_BDCR register, after reset.