The ALC is an bit, full duplex AC’97 compatible stereo audio CODEC designed for PC multimedia systems, including host/soft audio and AMR/CNR. Description, AC’97 Audio Codec. Company, Realtek Semiconductor Corporation. Datasheet, Download ALC datasheet. Quote. Find where to buy. Quote. Avance Logic, Inc. ALC AVANCE LOGIC, INC. SINGLE CHIP SIX CHANNEL AC’97 AUDIO CODEC ALC 1. Features.

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Set GPIO1 as output pin. The GPIOx is alcc650 pulled high by a weak resistor. Reading this register returns the ID code of the specific part.

ALC650 Datasheet PDF

Note that the 3D bit in the general purpose register bit 13 must be set to 1 to enable this function. Locked R Ca [1: Write 1 to clear this status bit.

Not yet Analog Mixer Status 1: Low to high transition default 1: Writing 1xxxxx will be interpreted as x and read as x Bit Type Function 15 Reserved Reading unimplemented registers will also return a 0. Bit 8 controls the mic selector. Locked by hardware 0: Register Write register indexed 00h Reset all registers to their default values.


GPIO1 is driven low by external device input. Not yet ADC Status 1: Set GPIO1 as input pin. Example of differential CD input 9.


Read as datazheet Depth control DP[ Combined rise or fall plus flight times are provided for worst case scenario modeling purpose. Below is an example of differential CD input.

Bit 9 allows selection of mono output. This register is used to adjust the sample rate. The written data is ignored. External amplifier power down capability.

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The first three codes have been assigned by Microsoft for Plug and Play definitions. Alc560 this reason, when 6th bit is written by 1, it is equivalent to writing low 5-bit with 1. By changing the values, sampling rates from to can be chosen.

EAPD output low enable external amplifier 1: Drive GPIO0 as high. MX38 is the master volume control of surround output. Each step in bits Always read as 0. This register used to control the master volume of surround output. Cold, Warm and Register reset which listed below: Bit 7 enables loopback of the AD output to the DA input without involving the AC-Link, allowing for full system performance measurements.


If validity control is set MX3A. The 3D stereo enhancement function provides for a deeper and wider sound experience with a potential 6-speaker arrangement.

See table under Section 6.

Datzsheet is up to normal level 0: The ALC CODEC provides two pairs of stereo outputs with independent volume controls, a mono output, and multiple stereo and mono inputs, along with flexible mixing, gain and mute functions to provide a complete integrated audio solution for PCs. Stereo output with 5-bit volume control. Intel Pentium 4 Proces