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LM4935RLEVAL Datasheet(PDF) 38 Page - Texas Instruments |
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LM4935RLEVAL Datasheet(HTML) 38 Page - Texas Instruments |
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38 / 91 page  g m s Stereo + Cellular s g m Cellular s g s Stereo s m = mic s = speaker g = virtual ground 1 PF EXT_MIC HP_L HP_R HP_VMID_FB HP_VMID MIC_DET EXT_MIC_BIAS 2.2 k: 3.3/2.8/2.5V 1.2/1.5V Connection for OCL Mode (DC-Coupled) Headset Detection g m s Stereo + Cellular s g m Cellular s g s Stereo s m = mic s = speaker g = ground (A_VSS) 1 k: 47 PF 1 PF EXT_MIC HP_L HP_R HP_VMID_FB HP_VMID 1 k: MIC_DET EXT_MIC_BIAS 2.2 k: 2.0/2.5V A_VDD/2 Connection for Non-OCL Mode (AC-Coupled) Headset Detection 47 PF LM4935, LM4935RLEVAL SNAS296D – OCTOBER 2005 – REVISED MARCH 2006 www.ti.com Figure 4-13. Connection of Headset Jack to LM4935 Depends on the Mode of the Headphone Amplifier. 4.2.30 STATUS REGISTER This register is used to report the status of the device. Table 4-30. STATUS (0x18h) Bits Field Description 0 HEADSET This field is high when headset presence is detected (only valid if the detection system is enabled). (Note 29) 1 STEREO_ This field is high when a headset with stereo speakers is detected (only valid if the detection system is HEADSET enabled). (Note 29) 2 MIC This field is high when a headset with a microphone is detected (only valid if the detection system is enabled). (Note 29) 3 BTN This field is high when the button on the headset is pressed (only valid if the detection system is enabled). IRQ is cleared when the button has been released and this register has been written to. 4 SAR TRIG 1 If this field is high then an event has happened on SAR trigger 1 (write to this register to clear IRQ). 5 SAR TRIG 2 If this field is high then an event has happened on SAR trigger 2 (write to this register to clear IRQ). 6 TEMP If this field is high then a temperature event has occurred (write to this register to clear IRQ). This field will stay high even when the IRQ is cleared so long as the event occurs. This bit is only valid whenever the loudspeaker amplifier is turned off. 7 GPIN When GPIO_SEL is set to a readable configuration a digital input on GPIO1 can be read back here. 38 Application Information Copyright © 2005–2006, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: LM4935 LM4935RLEVAL |
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