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ALC887-VD Datasheet(PDF) 35 Page - Realtek Semiconductor Corp. |
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ALC887-VD Datasheet(HTML) 35 Page - Realtek Semiconductor Corp. |
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35 / 91 page  ALC887-VD Datasheet 7.1 Channel High Definition Audio Codec with Two Independent S/PDIF Output 27 Rev. 0.22 8. Supported Verbs and Parameters This section describes the Verbs and Parameters supported by various widgets in the ALC887-VD. If a verb is not supported by the addressed widget, it will respond with 32 bits of ‘0’. 8.1. Verb – Get Parameters (Verb ID=F00h) The ‘Get Parameters’verb is used to get system information and the function capabilities of the HDA codec. All the parameters are read-only. There are a total of 15 ID parameters defined for each widget. Some parameters are supported only in a specific widget. Refer to section 7.4.1 Command Verb Format, page 22, for detailed information about supported parameters. Table 17. Verb – Get Parameters (Verb ID=F00h) Get Parameter Command Format Codec Response Format Bit [31:28] Bit [27:20] Bit [19:8] Payload Bit [7:0] Response [31:0] CAd=X Node ID=00h Verb ID=F00h Parameter ID[7:0] 32-bit Response Note: If the parameter ID is not supported, the returned response is 32 bits of ‘0’. 8.1.1. Parameter – Vendor ID (Verb ID=F00h, Parameter ID=00h) Table 18. Parameter – Vendor ID (Verb ID=F00h, Parameter ID=00h) Codec Response Format Bit Description 31:16 Vendor ID=10ECh (Realtek’s PCI vendor ID) 15:0 Device ID=0887h Note: The Root Node (NID=00h) supports this parameter. 8.1.2. Parameter – Revision ID (Verb ID=F00h, Parameter ID=02h) Table 19. Parameter – Revision ID (Verb ID=F00h, Parameter ID=02h) Codec Response Format Bit Description 31:24 Reserved. Read as 0’s 23:20 MajRev. The major version number (in decimal) of the HDA Spec to which the ALC887-VD is fully compliant. Response=0x1 19:16 MinRev. The minor version number (in decimal) of the HDA Spec to which the ALC887-VD is fully compliant. Response=0x0 15:8 Revision ID. The vendor’s revision number 00h is for the first silicon version (A version), 01h is for the second version (B version), etc. 7:0 Stepping ID. The vendor’s stepping number within the given Revision ID Note: The Root Node (NID=00h in the ALC887-VD) supports this parameter. |
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