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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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CS4294 Arkusz danych(PDF) 28 Page - Cirrus Logic |
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CS4294 Arkusz danych(HTML) 28 Page - Cirrus Logic |
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28 / 42 page  CS4294 28 DS326PP4 6.1.28 GPIO Pin Wakeup Mask (Index 4Ch) GW[8:3] Wake up mask. If set, allow the GPIO input to generate AC-LINK wake up protocol. Default 0000h The CS4294 has the ability to generate a “wake up” cycle by a transition of a GPIO pin when the AC-Link has been powered down. If a mask bit is set, a one being set in the corresponding GPIO Pin Status (Index 54h) will initiate a wake up interrupt. Bit 0 of SDATA_IN Slot 12 will be set indicating a GPIO interrupt. GPIO pins must be defined as “input”, “sticky”, and the mask set to allow a GPIO interrupt. The GPIO interrupt is cleared by writing a 0 to the respective status bit in GPIO Pin Status (Index 54h) register. 6.1.29 GPIO Pin Status (Index 54h) GI[8:3] GPIO pin status. Reflects the state of all GPIO pins either input or output. If the GPIO pin is defined as an output, the respective bit reflects the state of SDATA_OUT Slot 12. If the GPIO pin is defined as an input, the register is reflected in SDATA_IN Slot 12. GPIO output pins cannot be accessed by Slot 1,2 register access, only by SDATA_OUT Slot 12. 6.1.30 AC Mode Control (Index 5Eh) DDM DAC Direct Mode. This bit controls the source to the line and alternate line output drivers. When set, the Left and Right DAC directly drive the line and alternate line outputs by bypassing the audio mixer. When clear, the audio mixer is the source for the line and alternate line outputs. EAM Extended Audio Mode. When set the output of EDAC2 and EDAC1 are mapped to the ALT_LINE OUT- PUT. The Extended Audio DAC volumes are set by the Alternate Line Volume (Index 04h) register when in this mode. EDM Extended Docking Mode. When set the output of the analog input mixer is routed to the EADC1 and EADC2 inputs. This allows any analog input mix to be digitized and routed to a second AC ‘97 codec or allows the host controller to add effects processing to analog sources. MD[1:0] Mode. Sets basic operating mode for the codec. This effects the mapping of the ADCs and DACs to AC- LINK Slot locations. See the Mode of Operation subsection for additional detail. Table 8 below details the Slot mapping. Default 0000h D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 GW8 GW7 GW6 GW5 GW4 GW3 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 GI8 GI7 GI6 GI5 GI4 GI3 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 EDM EAM DDM MD1 MD0 Mode Type MD[1:0] Audio DAC1 Audio DAC2 Audio ADC1 Audio ADC2 Ext’d DAC1 Ext’d DAC2 Ext’d ADC1 Ext’d ADC2 GPIO 0 Basic 0,0 Left Right Left Right Ext’d Left Ext’d Right Left Mixer Right Mixer 3434 5 11 5 11 12 1 Extended 4 Channel 1,1 Sur’nd Left Sur’nd Right Left Right Center LFE Left Mixer Right Mixer 7834 6 9 5 11 12 Table 8. Slot Assignments |
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