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ALC262-GR Datasheet(PDF) 31 Page - Realtek Semiconductor Corp. |
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ALC262-GR Datasheet(HTML) 31 Page - Realtek Semiconductor Corp. |
31 / 76 page ALC262 Series Datasheet 4-Ch DAC and 6-Ch ADC High Definition Audio Codec 23 Track ID: JATR-1076-21 Rev. 1.7 8.5. Power Management The ALC262 does not support Wake-Up events when in low power mode. All power management state changes in widgets are driven by software. Table 14, shows the System Power State Definitions. In the ALC262, all the widgets include output/input converters support power control. Software may have various power states depending on system configuration. Table 15 indicates those nodes that support power management. To simplify power control, software can configure whole codec power states through the audio function (NID=01h). Output converters (DACs) and input converters (ADCs) have no individual power control to supply fine-grained power control. Table 14. System Power State Definitions Power States Definitions D0 All power on. Individual DACs and ADCs can be powered up or down as required. D1 All amplifiers and converters (DACs and ADCs) are powered down. State maintained, analog reference stays up. D2 All amplifiers and converters (DACs and ADCs) are powered down. State maintained, but analog reference off (D1 + analog reference off). D3 (Hot) Power still supplied. The codec stops the internal clock. State is maintained. D3 (Cold) All power removed. State lost. Table 15. Power Controls in NID is 01h, 02h~05h, 07h~09h Description D0 D1 D2 D3 (Hot/Cold) Link Reset LINK Response Normal Normal Normal PD PD DAC Normal PD PD PD PD LINE ADC Normal PD PD PD PD MIX ADC Normal PD PD PD PD All Headphone Drivers Normal Normal PD PD Normal All Mixers Normal Normal PD PD Normal Audio Function (NID=01h) All Reference Normal Normal PD PD Normal Note: PD=Powered Down Table 16. Powered Down Conditions Condition Description LINK Response powered down Internal clock is stopped. SDATA-IN and S/PDIF-OUT are floated with pulled low 47K resistors internally. Detection of ‘Link Reset Entry’ and ‘Link Reset Exit’ sequences are supported. All states are maintained if DVDD is supplied. LOUT DAC powered down Analog block and digital filter are powered down. LINE ADC powered down Analog block and digital filter are powered down. The data on SDATA-IN is quiet. MIX ADC powered down Analog block and digital filter are powered down. The data on SDATA-IN is quiet. Headphone Driver powered down All headphone drivers are powered down. Mixers powered down All internal mixer widgets are powered down. The DC reference and VREFOUTx at individual pin complex are still alive. Reference power down All internal references, DC reference, and VREFOUTx at individual pin complexes are off. |
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