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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Intel Pentium 4 Proces Mono output with 5-bit alc605 control. Stereo output with 5-bit volume control. External amplifier power down capability. 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.

Finally, internal PLL circuits generate required timing signals, eliminating the need for external clocking devices. The clock source is Reading unimplemented registers will also return a 0.

MX38 is the master volume control of surround output. Reading this register returns the ID code of the specific part. Bit Type Function satasheet Reserved The written data is ignored. Each step on the alc605 and right channels correspond to 1.

The 6th bit implementation is optional. For this reason, when 6th bit is written by 1, it is equivalent to writing low 5-bit with 1. For example, writing 1xxxxx will read back Mono output is the same data sent on all output channels.

Each step in bits Writing 1xxxxx will be interpreted as x and respond when read with x as well. Because software modem applications may not have a speaker, the CODEC can offer a speaker-out service. Each step in bit 6 corresponds to dattasheet magnification of 20dB increase in volume.


Bit Type Function Bit 13 enables or disables 3D control.

Bit 9 allows selection of mono output. Bit 8 controls the mic selector. Bit ddatasheet enables loopback of the AD output to the DA input without involving the AC-Link, allowing for full system performance measurements.

Enable Reserved Bit 13 is used to turn on 3D effects in both front and surround path. The 3D stereo enhancement function provides for a deeper and wider sound experience with a potential 6-speaker arrangement.

Note that the 3D bit in the general purpose register bit 13 must be set to 1 to enable this function. Read as 0 Depth control DP[ When this register is written, the bit values that come in on AC-Link will have no effect on read only bits and bit EAPD output low enable external amplifier 1: Power down Mixer Vref off PR2 0: Power down Mixer Vref datasneet on PR1 0: Vref is up to normal level 0: Not yet Analog Mixer Status 1: Not yet DAC Status 1: Not yet ADC Status 1: Always read as 0.

This register is used to adjust the sample rate. By changing the values, sampling rates from to can be chosen. See table under Section 6. Writing 1xxxxx will be interpreted as x and read as x This register used dataseet control the master volume of LFE and center output.


And there is no gain for MX This register used to control the master volume of surround output. If validity control is set MX3A. Locked by hardware 0: Locked R Ca [1: Sample Frequency in channel status S-OUT is the real surround output. Low to high transition default 1: A transaction which polarity depends on MX Set GPIO1 as input pin. Set GPIO1 as output pin.


Set GPIO0 as input pin. Set GPIO0 as output pin.

REALTEK – Download english datasheets for Realtek ALC

Drive GPIO0 as low. Drive GPIO0 as high. Write 1 to clear this status bit. GPIO1 is driven low by external device input. GPIO1 is driven high by dwtasheet device input. GPIO0 is driven low by external device input.

GPIO0 is driven high by external device input. The GPIOx is internally pulled high by a weak resistor. Bit 2 is used to select the clock source for the ALC The first three codes have been assigned by Microsoft for Plug and Play definitions. The fourth code is a Realtek assigned code identifying dafasheet ALC Combined rise or fall plus flight times are provided for worst case scenario modeling purpose.

Analog Performance Characteristics Wlc650 test condition: The ALC will return any uninstalled bits or registers with 0 for the read operation. Cold, Warm and Register reset which listed below: Register Write register indexed 00h Reset all registers to their default values. Below is an example of differential CD input. Example of differential CD input 9.