 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
CS43199 Datasheet(PDF) 63 Page - Cirrus Logic |
|
|
|||||||||||||||||||||||||||||
CS43199 Datasheet(HTML) 63 Page - Cirrus Logic |
|
|
63 / 111 page  DS1113F1 63 CS4399 5.10 Example Sequences 5.10.4 Switching MCLK Frequency Ex. 5-10 shows steps necessary to switch the MCLK frequency in order to play audio at a different sample rate that is no longer an integer divide of current MCLK. It makes the following assumptions: • The CS4399 is already powered up and out of reset. • MCLK is sourced directly from external clock input (Direct MCLK). MCLK_INT is 22.5792 MHz, and the sample rate is an integer divide of MCLK. • ASP is used for audio delivery and PDN_HP = 0. 5.10.5 Headphone Detection Ex. 5-11 shows steps necessary to detect the presence of a headphone. It makes the following assumptions: • The CS4399 is already powered up and out of reset. • The HP Detect register is not configured. Example 5-10. Sequence for Switching MCLK Frequency STEP TASK REGISTER/BIT FIELDS VALUE DESCRIPTION 1 Power down PCM Refer to Ex. 5-1 for PCM power-down sequence 2 Switch MCLK Source to RCO 3 Set MCLK Source to RCO System Clocking Control 1. 0x10006 0x06 Reserved MCLK_INT MCLK_SRC_SEL 0000 0 1 10 Frequency of MCLK_INT is don't care MCLK source set to RCO 4 Wait for 150 µs 5 Switch to a different MCLK Frequency. Assuming new MCLK frequency is 24.576MHz. 6 Change MCLK_INT frequency to 24.576 MHz System Clocking Control 1. 0x10006 0x02 Reserved MCLK_INT MCLK_SRC_SEL 0000 0 0 10 MCLK_INT frequency set to 24.576 MHz 7 Apply PCM power-up initialization in Ex. 5-3 8 Configure ASP for appropriate sample rate, bit size and clock mode. Unmute PCM CHA and CHB outputs. Enable appropriate interrupts 9 Switch MCLK source to direct MCLK mode System Clocking Control 1. 0x10006 0x0 Reserved MCLK_INT MCLK_SRC_SEL 0000 0 0 00 MCLK_INT frequency set to 24.576 MHz MCLK source set to direct MCLK mode 10 Wait at least 150 µs. 11 Power up DAC Refer to Ex. 5-5 for PCM power-up sequence. Skip Step 1 of Ex. 5-5 (completed in Step 7 above). Example 5-11. Sequence for Headphone Detection STEP TASK REGISTER/BIT FIELDS VALUE DESCRIPTION 1 Read Interrupt Status 1 register (0xF0000) to clear any sticky bits. 2 Read HP Status register (0xD0001) to clear any sticky bits. 3 Enable HPDETECT interrupts Interrupt Mask 1. 0xF0010 data (0xF0010) AND 0x9F DAC_OVFL_INT_MASK HPDETECT_PLUG_INT_MASK HPDETECT_UNPLUG_INT_MASK XTAL_READY_INT_MASK XTAL_ERROR_INT_MASK PLL_READY_INT_MASK PLL_ERROR_INT_MASK PDN_DONE_INT_MASK x 0 0 x x x x x Enable HPDETECT interrupts 4 Configure HP Detect parameters HP Detect. 0xD0000 0x04 HPDETECT_CTRL HPDETECT_INV HPDETECT_RISE_DBC_TIME HPDETECT_FALL_DBC_TIME Reserved 00 0 0 0 10 0 Rising edge debounce time set to 0 ms Falling edge debounce time set to 500 ms 5 Enable HP Detect HP Detect. 0xD0000 data (0xD0000) OR (0xC0) HPDETECT_CTRL HPDETECT_INV HPDETECT_RISE_DBC_TIME HPDETECT_FALL_DBC_TIME Reserved 11 x x x xx 0 Enable headphone detection |
|
Link URL |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link to Datasheet | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
