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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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CS43131 데이터시트(PDF) 64 Page - Cirrus Logic |
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CS43131 데이터시트(HTML) 64 Page - Cirrus Logic |
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64 / 156 page  64 DS1155F1 CS43131 5.4 Alert Mixing Shutdown 2. Power up and verify communication with CS43131. If there is no communication, it is possible that the crystal did not start. Check power rails and load capacitance and try again. 3. Clear PDN_CLKOUT in the Power Down Control (0x20000) register. This sets the clock output at MCLK_INT/2 frequency from CLKOUT pin. 4. Measure the frequency and verify that it is within acceptable range of the desired frequency. If yes, continue normal operation. If not, power down the chip, change the load capacitor values and go back to step 2. Note: These steps need to be performed only once per PCB. 5.4 Alert Mixing Shutdown To prevent a DSD mute pattern from turning off the DAC while mixing DSD data with PCM data, turn off the auto mute by clearing the DSD_AMUTE bit. 5.5 Enable/Disable Alternate Headphone Path (HPINx) If the user decides to use the HPINx path, the following sequences must be followed to enable/disable the alternate headphone path (HPINx). 5.5.1 HPINx Alternate Headphone Path Enable Sequence To enable the HPINx path, follow the sequence in Ex. 5-1. 5.5.2 HPINx Disable Sequence To disable the HPINx path, follow the sequence in Ex. 5-2. For pop-free operation, the audio input must be completely ramped down before executing this sequence. Example 5-1. HPINx Enable Sequence TASK REGISTER/BIT FIELDS VALUE DESCRIPTION Enable headphone input HP Output Control 1. 0x80000 0x38 HP_CLAMPA HP_CLAMPB OUT_FS HP_IN_EN HP_IN_LP Reserved +1dB_EN 0 0 11 1 0 0 0 Function disabled Function disabled Headphone output voltage setting is irrelevant Enable HPIN switch Function disabled Wait for 1.1 ms. Enable low power mode HP Output Control 1. 0x80000 0x3C HP_CLAMPA HP_CLAMPB OUT_FS HP_IN_EN HP_IN_LP Reserved +1dB_EN 0 0 11 1 1 0 0 Function disabled Function disabled Headphone output voltage setting is irrelevant Enable HPIN switch Function enabled Example 5-2. HPINx Disable TASK REGISTER/BIT FIELDS VALUE DESCRIPTION Disable HPINx low power mode HP Output Control 1. 0x80000 0x38 HP_CLAMPA HP_CLAMPB OUT_FS HP_IN_EN HP_IN_LP Reserved +1dB_EN 0 0 11 1 0 0 0 Function disabled Function disabled Headphone output voltage setting is irrelevant Enable HPIN switch Function disabled |
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