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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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WM8850 데이터시트(PDF) 73 Page - Wolfson Microelectronics plc |
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WM8850 데이터시트(HTML) 73 Page - Wolfson Microelectronics plc |
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73 / 223 page  Pre-Production WM8850 w PP, April 2011, Rev 3.2 73 ANCILLARY FUNCTIONS The WM8850 contains a beep widget suitable for the playback of system beeps to the analogue output widgets. BEEP (NID = 14h) Table 31 gives a summary of the Beep node: NODE SUMMARY INFORMATION NID 14h Widget Type Beep Generator Supported Get Verbs Bh, F00h, F0Ah, F72h Supported Set Verbs 3h, 70Ah, 772h Unsolicited Responses Not supported Vendor-Specific Verbs F72h, 772h : Beep Mask Selection Verb Table 31 Beep Node Summary Information The Beep node controls the system beep sound created by the WM8850. The volume of the beep signal is controlled using the Amplifier Gain/Mute Verb. The frequency of the beep signal is controlled using the Beep Generation Verb. The beep signal overrides any sound currently being reproduced in the output path. Under default conditions, the beep is applied to all active outputs simultaneously. It is possible to mask the beep generator output to appear only at specific output nodes using the vendor-specific Beep Mask Selection Verb. SET VERB BIT BITFIELD NAME DEFAULT DESCRIPTION 772h 2 Port-A Beep Mask 0h Beep mask enable for Port-A (DAC1) 0h = Beep produced on Port-A 1h = Beep not produced on Port-A 1 Port-G Beep Mask 0h Beep mask enable for Port-G (DAC2) 0h = Beep produced on Port-G 1h = Beep not produced on Port-G 0 Port-F Beep Mask 0h Beep mask enable for Port-F (DAC3) 0h = Beep produced on Port-F 1h = Beep not produced on Port-F AUDIO FUNCTION GROUP (NID = 01h) Table 32 gives a summary of the Audio Function Group node: NODE SUMMARY INFORMATION NID 01h Widget Type Audio Function Group Supported Get Verbs F00h, F05h, F08h, F15h, F16h, F17h, F18h, F19h, F1Ah, F20h, F71h, F86h, F8Eh Supported Set Verbs 7FFh, 705h, 708h, 715h, 716h, 717h, 718h, 719h, 71Ah, 720h, 721h, 722h, 723h, 771h, 786h, 78Eh Unsolicited Responses GPIO status change Vendor-Specific Verbs F71h, 771h : VMID Control Verb F86h, 786h : GPIO Automatic Control Verb F8Eh, 78Eh : Unsolicited Response Priority Control Verb Table 32 Audio Function Group Node Summary Information |
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