【通信应用笔记】音频M41T00AUD实时时钟的理解和运用 AN2583 Application note Understanding and applying the M41T00AUD real-time clock with audio Introduction Drawing on the fact that the squarewave generator built in to many ST serial RTCs can be used as a tone generator, users have been employing ST real-time clocks in printer-fax scanner units for several years. In these applications, the squarewave output is used to create the audible beeps these all-in-one (AIO) machines make when a key is pressed or an error occurs. The ……