AK4137 I2S/DSD Sampling Rate Conversion Board Support PCM/DSD DOP Input | Инструменты

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AK4137 I2S/DSDSampling Rate Turntable SupportI2S/DSDInterturn SupportDOPinput

AK4137SupportPCMturnPCM（Convertible sampling rate and data format），DSDturnDSD（TransformationDSDSampling rate），PCMturnDSD，DSDturnPCM，DOPturnPCM，DOPturnDSD。

！Standard version crystal oscillator configuration 22.5792M 24.576M

！Crystal Oscillator Configuration for Low Frequency Edition 11.2896M 12.288M

！768KConfiguration of plate crystal oscillator22.5972M 49.152M

Sampling rate of output function supported by each version is shown in the following table：

The following details are all referenced in the Standard Edition.↓↓↓↓↓↓↓↓↓↓↓↓↓

The input signal range of this board：

PCMPatterns can be entered I2S（I2SThe format is also called Philips format.16-32bit），LJ（Left alignment format16-32bit），RJ24（Right alignment is also called Sony format.24bit），RJ32（Right alignment is also called Sony format.32bit），Right alignment is not supported for reasons of chip manufacturer design（SONY）Format below24bitSignal Input。DSDPatterns can be enteredDSD64 DSD128 DSD256。as well asDOPdata（DOPData should be inPCMMode Input）。

Output signal range of this board：

PCMMode can be output I2Sformat LJ（Left alignment format） RJ（Right-Justified Format）All three formats can be output16bit 20bit 24bit 32bitData 44.1K 48K 88.2K 96K 176.4K 192K 352.8K 384KSampling rate ，as well asslave（Slave mode）。DSDMode can be output DSD64 DSD128 DSD256。

Be careful：inputPCMSignal below44.1KTime will not be converted intoDSD，Nor can it be converted intoPCMHigher sampling rate。inputPCMSignal below176.4KTime can be outputDSD64 DSD128 Unable to outputDSD256。

Board Interface Description：POWInterface is power input interface（Only DC can be used5VUnacceptable）；I2S/DSD-OUTThe interface isI2S/DSDData Output Interface；I2S/DSD-INbyI2S/DSDData Input Interface；D/PFor manual controlPCM/DSDInput mode interface（It can also be accessed through the data input port.1Foot controlPCM/DSDInput mode）；KPorts are special function interfaces；LCDPORTInterface for display screen（The display panel is connected to the panel.1Foot display panel1foot，2Foot joint2foot...And so on.，Four pinless feet in the middle don't fit.）。

Be careful：UseI2S/DSD-INInterface1Disconnect Foot Control Input ModeD/PInterface。

It's on the board.4A button can set the board（The setup method is shown below.），In addition to the silence function, other functions set by keys can power off memory so that the board still works in the mode set last time it is turned on next time.。

I2S/DSD-INInterface Foot Definition：1Feet asDSDEnabling input（Also calledDSDONorDSDOE）、2footGND、3footDATA/DSDLinput、4footBCK/DCLKinput、5The foot is empty and does not need to be connected.、6footLRCK/DSDRinput。This board input interface does not require inputMCLKYou can work.。

I2S/DSD-OUTInterface Foot Definition：1Feet asDSDEnabling output（Also calledDSDONorDSDOE）、2footGND、3footDATA/DSDLoutput，4footBCK/DCLKoutput、5footMCLKoutput、6footLRCK/DSDRoutput。outputPCMMode time1Foot Output Low Level，outputDSDMode time1Foot Output High Level。

Detailed introduction of usage method：↓↓↓↓↓↓↓↓↓↓↓↓↓↓

First turn on the power supply，POWInterface connection5VPower supply voltage range4.8-5.5V（Not to mention the power connection.，Anyone who understands the basics of the circuit knows how to connect it.，It should be noted that the voltage range is also not to be reversed on the line.）。

Enter relevant settings：↓↓↓↓↓↓↓↓↓

Setting Signal InputPattern：First of all, determine that the input signal isDSDSignal orPCM（I2S）signal，ThroughD/PInterface to set input mode，Short connectionD/PInterface input signal mode works inPCM（I2S）Pattern，To break offD/PInterface input mode works inDSDPattern。It can also be passed throughI2S/DSD-INInterface1Feet control input mode，I2S/DSD-INInterface1Foot input low levelPCMInput mode，The input high level isDSDInput mode。It should be noted that the use ofI2S/DSD-INInterface1Feet control input mode must be disconnectedD/PInterface（No short connection or you can only work inPCMPatterns may also lead to provisionDSDON/DSDOEEquipment damage of signal）。Need inputDOPThe input interface should also be configured for signals.PCMPatterns will do。

Setting Signal InputFormat, etc.：stayPCMThe input mode can be passed throughLong pressKey1To switch the format of input data，Change the format of an input signal one time at a time，And the corresponding first line of letters on the display screen“I”The format of the input is displayed later.，And with power-off memory function。The input format includesI2S、LJ、RJ24、RJ32、DOP，Cyclic switching。stayDSDThe input mode can be passed throughLong pressKey2To switch inputDSDSampling rate and corresponding first line letters on the display screen“I”There will be a display in the back.，And with power-off memory。DSDInput includesDSD64、DSD128、DSD256，Cyclic switching。In addition, it can also be passed throughKportK1 K2To switch inputDSDsampling rate（See table below.1）It should be noted that throughLong pressKey2To switch inputDSDThe signal needs to be disconnectedK1 K2（Give WayK1 K2All of them are disconnected from the empty state or they will be usedK1 K2To configureDSDSampling rate of input）。K1 K2It can automatically switch input when matching Italian interface.DSDsampling rate（K1Interface with Italy18foot，K2Interface with Italy19foot）！

notes：0 For input low level(0V)，1 For input high level(3.3V)。

Output related settings：↓↓↓↓↓↓↓↓↓

Setting output format, etc.：adoptShort pressKey1To switch the format of the output signal，Settable formats include I2Sformat、LJ（Left alignment）、 RJ（Right alignment）、DSD64、DSD128、DSD256，Cyclic switching with power-off memory and related display in the second line of screen。

Set upPCMSampling rate of output mode（This functionPCMOutput mode is valid，DSDThe output sampling rate is throughShort pressKey1To switch）：adoptShort pressKey2To switch the sampling rate of the output signal，Settable sampling rates include 44.1K、48K、88.2K、96K、176.4K、192K、352.8K、384K、SLA（slaveOutput from mode），Cyclic switching with power-off memory and related display in the second line of screen。

Set upPCMBit Number of Output Mode（AllPCMSettable in data format）:adoptShort pressKey3To switch the number of bits of the output signal，Settable bits include16bit、20bit、24nit、32bit（Other bits are not supported），Cyclic switching with power-off memory and related display in the second line of screen。

Other settings：↓↓↓↓↓↓↓

Digital filter settings：adoptLong pressKey3To switch digital filter mode。This setting has power-off memory and will be displayed in the second half of the first line of the screen.，The display content is as followsDF1、DF2、DF3、DF4，Corresponding to the table below2The filter mode in the。

Jitter settings（Add jitter to the signal）：adoptLong pressKey4Setting dither switch，Long press followed by the last two displays in the second line of the screen"DT"Turn on the jitter function，Long press back againThe last two displays in the second line of the screen"DT"When it disappears, it closes the jitter.。This function brings power-off memory。

Mute Settings：Setting methodShort pressKey4The last two display in the first line of the screen"MT"Quiet voice，Short click again"MT"If it disappears, the mute will be cancelled and normal play will be cancelled.，This function has no power-off memory，Restart silence is cancelled。

Key Function Table：↓↓↓↓↓↓↓↓↓↓

Key1：Long Press SwitchoverPCMInput format（PCMInput mode is valid）；Short Press Switching Output Mode。

Key2：Long Press SwitchoverDSDInput Sampling Rate（DSDInput mode is valid）；Short Press SwitchingPCMOutput sampling rate（PCMOutput mode is valid）。

Key3：Long Press Switching Filter Mode；Short Press SwitchingPCMOutput Bit Number（PCMOutput mode is valid）。

Key4：Long press as jitter switch；Short Press Mute Switch。

Electrical characteristics：↓↓↓↓↓↓↓

Power Supply：DC5V（DC Voltage5VConnecting AC will lead to board damage）Voltage range4.8-5.5V（Beyond this range, the board will be damaged or not working properly.）。

Input signal support3.3Vlevel 5Vlevel；The output signal is3.3Vlevel。

PCBPlate size：5.2cm x 6.3cm

Display screen is standard1602Display，Size parameters can be searched in Baidu。

Precision is used for both crystal oscillators on the board.LDOpower supply，And one of them works by turning off the other to reduce interference.。

KPorts except1Number2Number（K1、K2）Please try not to use other interfaces by yourself.，For use, please consult customer service。

Please consult online customer service for any other information that is not included in the introduction.！！！

Due to the unstable market of electronic components, some components may be out of stock and replaced by other brands, but it is guaranteed that it will not affect your use effect.！Mind not shooting！

Documents such as schematic diagrams are not provided for this product.！Provide only interface definitions（Introductions are written or marked on boards.）！