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CS43130 Datasheet(PDF) 86 Page - Cirrus Logic |
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CS43130 Datasheet(HTML) 86 Page - Cirrus Logic |
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86 / 137 page  86 DS1073F1 CS43130 5.11 Headphone Load Measurement 2 Select Channel A 0x10010 0x99 0x10026 0x0A 0x10027 0x93 0x10028 0x0A 0x10010 0x00 HP Load 1. 0xE0000 0x80 HPLOAD_EN Reserved HPLOAD_CHN_SEL Reserved HPLOAD_AC_START HPLOAD_DC_START 1 00 0 00 0 0 HPOUTA selected 3 Enable DC impedance measurement HP Load 1. 0xE0000 0x81 HPLOAD_EN Reserved HPLOAD_CHN_SEL Reserved HPLOAD_AC_START HPLOAD_DC_START 1 00 0 00 0 1 Start DC impedance measurement 4 Wait for interrupt. Read Interrupt Status 4 register (0xF0003). If HPLOAD_UNPLUG_INT = 1, go to the last step as an error has occurred. If HPLOAD_OOR_INT = 1, go to the last step as an error has occurred. Otherwise, if HPLOAD_DC_DONE_INT = 1, go to the next step. 5 DC impedance values are available in HP DC Load Status 0 (0xE000D) and HP DC Load Status 1 (0xE000E) registers. 6 Disable DC impedance measurement HP Load 1. 0xE0000 0x80 HPLOAD_EN Reserved HPLOAD_CHN_SEL Reserved HPLOAD_AC_START HPLOAD_DC_START 1 00 0 00 0 0 Stop DC impedance measurement 7 Select Channel B 0x10010 0x99 0x10026 0x8A 0x10027 0x15 0x10028 0x06 0x10010 0x00 HP Load 1. 0xE0000 0x90 HPLOAD_EN Reserved HPLOAD_CHN_SEL Reserved HPLOAD_AC_START HPLOAD_DC_START 1 00 1 00 0 0 HPOUTB selected 8 Enable DC impedance measurement HP Load 1. 0xE0000 0x91 HPLOAD_EN Reserved HPLOAD_CHN_SEL Reserved HPLOAD_AC_START HPLOAD_DC_START 1 00 1 00 0 1 HPOUTB selected Start DC impedance measurement 9 Wait for interrupt. Read Interrupt Status 4 register (0xF0003). If HPLOAD_UNPLUG_INT = 1, go to the last step as an error has occurred. If HPLOAD_OOR_INT = 1, go to the last step as an error has occurred. Otherwise, if HPLOAD_DC_DONE_INT = 1, go to the next step. 10 DC impedance values are available in HP DC Load Status 0 (0xE000D) and HP DC Load Status 1 (0xE000E) registers. 11 To measure AC impedance, go to Step 3 of Ex. 5-22. 12 Disable impedance measurement subsystem. Refer to Ex. 5-23. Example 5-21. Sequence for DC Impedance Measurement (Cont.) STEP TASK REGISTER/BIT FIELDS VALUE DESCRIPTION |
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