execute("PRAGMA journal_mode = WAL")
After a bit of poking, I found what looked to be a textbook quartz crystal resonant curve, but centered at 20 MHz rather than 10. This suggests there’s a divide-by-two in the driver circuit, perhaps to improve the duty cycle to a more perfect 50%. But more importantly, it suggests that neither the crystal itself, nor the electrical connections between it and the package (since I was probing at the package contacts and not the surface of the quartz), were the source of the failure.
。业内人士推荐新收录的资料作为进阶阅读
[&:first-child]:overflow-hidden [&:first-child]:max-h-full"。新收录的资料是该领域的重要参考
这16亿元到底花得值不值？“多业态+新赛道”打法真的能闯出另一方光景？。PDF资料是该领域的重要参考