| Pin # | Pin Name | HD Audio Mode Function | AC’97 Mode Function | | :--- | :--- | :--- | :--- | | 5 | | Serial Data Out (to codec) | Serial Data Out (to codec) | | 6 | SDATA_IN | Serial Data In (from codec) | Serial Data In (from codec) | | 7 | SYNC / BIT_CLK | 48MHz Bit Clock output | 12.288MHz Bit Clock output | | 8 | RST / RESET# | Active Low Reset | Active Low Reset |
One of the most critical features is the implementation of "Jack Detection" and "Auto-configuration." The ALC271X supports auto-switching between the internal speakers and external headphones. When a user plugs a headset into the audio jack, the codec detects the impedance change and automatically mutes the internal speakers, routing audio to the headphones. This seamless transition is managed through the codec’s firmware interface with the operating system. alc271x datasheet
The ALC271X serves as a bridge between digital data and analog sound. It integrates high-quality Digital-to-Analog Converters (DACs) and Analog-to-Digital Converters (ADCs). | Pin # | Pin Name | HD
The Realtek ALC271X is a 48-pin LQFP (Low-profile Quad Flat Package) audio codec. To understand its datasheet, one must first understand its mode . The ALC271X serves as a bridge between digital
(Section 6.2)
Buyers should exercise caution, as some market reports indicate a high "fake threat" (over 50%) in the open secondary market. IC Components Applications The chip is primarily integrated into: Laptops and Netbooks:
/* alc271x specific setup */ snd_hda_codec_write(codec, 0x20, 0, AC_VERB_SET_PROC_STATE, 0x01);
