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AK4133 Arkusz danych(PDF) 22 Page - Asahi Kasei Microsystems |
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AK4133 Arkusz danych(HTML) 22 Page - Asahi Kasei Microsystems |
22 / 29 page [AK4133] 015015325-E-02 2018/05 - 22 - ▪ When the frequency of OLRCK at output port is changed without a reset by the PDN pin When the difference of internal oscillator clock number in one OLRCK cycle between before and after changing OLRCK frequency (FSO/FSI ratio should be stabilized) is more than 1/16 for 8cycles (*), an internal reset is made automatically and sampling frequency ratio detection is executed again. SDTO outputs “L” when the internal reset is made, and SRC data is output after 162FSI(O) (FSI(O) is lower frequency between FSI and FSO). When the above condition (*) is not satisfied, the internal reset mentioned before will not be executed. It takes 5148/FSO (max. 643.5ms@FSO=8kHz) (* 18) to output normal SDTO data. Distorted data may be output until normal SDTO output. When OLRCK is stopped, an internal reset is executed automatically. It takes 162FSI(O) (FSI(O) is lower frequency between FSI and FSO) [sec] to output normal SDTO data after ILRCK is input again. Notes: * 18. When FSO=8kHz and FSO/FSI ratio is changed from 1/6 to 1/5.99. ■ Internal Status Pin The SRCE_N pin outputs internal state of the device. It outputs “H” while the PDN pin = “L”. SRC data is output from the SDTO pin when the PDN pin = “H” and the sampling frequency ratio detection is completed if the internal regulator is operated normally. An internal limit flag is set when an over current or over voltage flows at the internal regulator. An Ored result of the internal limit flag and an inverted flag of the ratio detection completion of SRC is output from the SRCE_N pin. Limit Flag at Regulator “L” Normal Operation “H” Over Current (Voltage) Detect Ratio Detection End Flag at SRC SRCE_N Pin Figure 19. Internal Flag and SRCE_N Pin Output ■ Grounding ans Power Supply Decoupling The AK4133 requires careful attention to power supply and grounding arrangements. Decoupling capacitors should be placed as near as possible to the supply pins. |
Podobny numer części - AK4133 |
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Podobny opis - AK4133 |
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