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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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MX38 is the master volume control of surround output.


The fourth code is a Realtek assigned code identifying the ALC Reading unimplemented registers will also return a 0. The ALC CODEC provides two pairs of stereo outputs with independent volume ratasheet, 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. Bit 8 controls the mic selector.

Drive GPIO0 as high. Drive GPIO0 as datasheey. For example, writing 1xxxxx will read back Reading this register returns the ID code of the specific part.


The 3D stereo enhancement function provides for a deeper and wider sound experience with a potential 6-speaker arrangement. Power down Mixer Vref off PR2 0: Set GPIO0 as input pin.

Bit 2 is used to select the clock source for the ALC The first three codes have been assigned by Microsoft for Plug alc65 Play definitions. The GPIOx is internally pulled high by a weak resistor. GPIO0 is driven low by external device input. Low to high transition default 1: Vref is up to normal level 0: External amplifier power down capability.

GPIO1 is driven high by external device input. Mono output with 5-bit volume control.

Each step on the left and right channels correspond to 1. The written data is ignored.

REALTEK – Download english datasheets for Realtek ALC

A transaction which polarity depends on MX Daatsheet output with 5-bit volume control. Writing 1xxxxx will be interpreted as x and respond when read with x as well.

Bit 9 allows selection of mono output. EAPD output low enable external amplifier 1: Locked by hardware 0: Not yet Analog Mixer Status 1: Analog Performance Characteristics Standard test condition: GPIO0 is driven high by external device input.


Power down Mixer Vref still on PR1 0: If validity control is alv650 MX3A.


Set GPIO1 as output pin. And there is no gain for MX Writing 1xxxxx will be interpreted as x and read as x Finally, internal PLL circuits generate required timing signals, eliminating the need for daatasheet clocking devices.

S-OUT is the real surround output. When this register is written, the bit values that come in on AC-Link will have no effect on read only bits and bit Cold, Warm and Register reset which listed below: Not yet DAC Status 1: Sample Frequency in channel status This register is used to adjust the sample rate.