OCTAL PDM TO 24-BIT TDM CONVERTER TSDP18xx - Tempo Semiconductor
Data Sheet Tempo Semiconductor, Inc.OCTAL PDM TO 24-BIT TDM CONVERTERTSDP18xxGENERAL DESCRIPTIONFEATURESThe TSDP18xx is an ultra low-power, high-performance, 8channel PDM to Linear PCM converter. It supports DigitalMEMS Microphone (DMIC) over sample rates up to6.144MHz; and output sampling rates of 8KHz up to384KHz enabling support for Ultrasonic capable DMICs. TSDP18xx supports 2 channel I2S or Left-Justified (LJ)format output as well as up to 8 channels using theTime-Division Multiplexed (TDM) format. The deviceenables a wide variety of configurations 32-bit, 24-bit or16-bit word lengths, clock polarity inversion, and more tomaximize compatibility with almost any DSP, AudioProcessor, Codec or SOC. The supplied DMIC sources are driven by a configurablePDM clock ranging from 256kHz up to 6.144MHz, while thedigital audio interface operates in slave mode with thesupplied SCLK signal ranging from 2MHz up to49.152MHz, and a LRCLK input providing a frame signalmatched to the format, I2S or TDM. Configuration of the FIR and decimation filter coefficientsare based on combination of SCLK to LRCLK / FRMCLKratio and the three OS MODE pins which impact theOversampling Mode, supporting 8x to 256x. 1 8 Channel Digital Microphone Arrays including: Smart Speakers / Smart ScreensVoice Assistance Enabled DevicesAudio / Video Conferencing SystemsAugmented / Virtual Reality SystemsMulti-Mic Beam Forming ApplicationsFar Field Voice Pickup ApplicationsMultichannel Audio Recording ApplicationsSupports single-edge clocked, double-edge clockedPDM DMICsSupports either 2 Channel I2S or LJ output format orTDM format capable of supporting from 2 up to 8channels.Supports configurable word lengths of 32-bits, 24-bits, or16-bitsSupports SLCK polarity inversionSupports FRMCLK widths from clock width to word-widthSupports single-edge or double edge clocked PDMDMICsUltra low-power standby and operation APPLICATIONSInternal processing takes place at the DMIC clock rate 142dB SNR / DNR / THD N Level (20Hz 20kHz)Output Fs supports 8kHz up to 384kHzConfigurable DMIC fixed output clock, based on Fs ofsupplied LRCLK and specified oversampling modeSupport for wide range of SLCK to LRCLK / FRMCLKratios: 32x, 48x, 64x, 96x, 128x, 192x, 256x, 384x, and512x with automatic detection of SCLKConfigurable downsampling rates ranging from 8 to 256depending on configuration of OS MODE3,OS MODE 2, & OS MODE1 pins as well as SCLK toLRCLK / FRMCLK ratioConfigurable I2S / LJ / TDM Output Format Engine There is a wide range of support for SCLK to LRCLK /FRMCLK ratios ranging from 32Fs to 512Fs. High-Fidelity Octal PDM to Linear PCM ConverterUltra-low standby ( 1uA) power consumption (whenSCLK signal is stopped)Single 1.8V ( /-5%) supply for both IOVDD and DVDDIOVDD can also operate at 3.3V ( /-5%)2.68mA operating current for 8 Channel TDM mode,Fs 48kHz, SLCK 256Fs, IOVdd 1.8V 3x3mm, 20-lead, 0.4mm pitch QFN Available in both Commercial (0C to 70C) andIndustrial Temperature (-40C to 85C) GradesDSD to PCM ConversionBLOCK DIAGRAM1.62V TO 3.6V1.62V TO 1.98VDVDDIOVDDGND2CH TDM1 2CH TDM2SCLK POLPDM CLKPDM DAT1PDM DAT2PDM DAT3PDM DAT4PDMINPUTPORT824-BITCIC &DECIMATIONFILTER24I²S / LJ /TDMOUTPUTPORTSCLKLRCLKSDATAGNDOS MODE3OS MODE2OS MODE1WL MSB WL LSB1 2019 Tempo Semiconductor, Inc.V0.97 -9/16/19TSDP18XX
TSDP18xxOctal PDM to 24-bit TDM ConverterFEATURES & DESCRIPTION . 3Configuring I2S, LJ & TDM Operation . 3Configuring SCLK Polarity .3Configuring the PCM Word Width .3Configuring the OS MODE [3:1] pins. 4DEVICE CHARACTERISTICS .5TYPICAL PERFORMANCE CHARACTERISTICS (FROM APX525) .7Typical Performance Characteristics (from Generated PDM Source) .10QFN PACKAGE LEAD CONFIGURATION AND FUNCTION DESCRIPTIONS .11QFN PACKAGE MECHANICAL SPECIFICATIONS 13AUDIO DATA FORMATS. 14Audio Input Format .14Double-Edge Clocked PDM Input Timing .14Single-Edge Clocked PDM Input Timing. 14Audio Output Formats 15Left Justified Audio Output .15I2S Format Audio Output .15TDM Format Audio Output .16SCLK, LRCK, Word Length & PCM Word Slot Availability .16Standard SCLK Polarity, TDM Audio Output .17Inverted SCLK Polarity, TDM Audio Output .18ORDERING INFORMATION .19REVISION HISTORY .202 2019 Tempo Semiconductor, Inc.V0.97 -9/16/19TSDP18XX
TSDP18xxOctal PDM to 24-bit TDM Converter1.0Features & DescriptionThe TSDP18xx is the solution of choice for applications that are employing 1 to 8 DMICs that must undergo 1-bit PDM toLinear PCM conversion. The TSDP18xx supports a wide number of data formats including I2S, LJ and TDM for 1 to 2channel operation or up to 8 channels (in TDM mode).The TSDP18xx ensures a long product life cycle by supporting the widest range of DMIC decimated sampling frequenciesin the market, ranging from 8kHz up to 384kHz. The device also maximizes the dynamic range of 4th or 5th order DMICused, while decreasing BOM cost, simplifying board layout, reducing pin count and reducing power consumption.Fs is determined by the supplied LRCLK and SCLK signals as the digital audio output port only operates in slave mode.Based on one of the following valid SCLK to LRCLK ratios (32x, 48x, 64x, 96x, 128x, 192x, 256x, 384x or 512x), as well asthe settings of OS MODE3, OS MODE2, OS MODE1 pins, the TSDP18xx automatically determines the oversamplingrate, as well as the correct FIR decimation filter coefficients to be applied.Valid input SCLK frequencies for the supported sampling frequencies range from 2MHz up to a maximum of 49.152MHz.The device automatically powers down to use less than 1uA in standby mode and resets when the SCLK signal is removed.The TSDP18xx comes in a 3x3mm, 20-lead, 0.4mm pitch QFN and requires a single 1.8V rail for both the IOVDD andDVDD supplies. IOVDD can also support 3.3V ( /-5%).For the configuration options below, a logical “0” means that the pin should be grounded (connected to the same GNDreference provided to pin 5), and a logical “1” means that the pin should be pulled-up with a 10kohm resistor to DVDD(connected to the same voltage reference provided to pin 19)1.1Configuring I2S, LJ & TDM OperationThe 2CH TDM1 and 2CH TDM2 pins enables the designer to be able to select between either 2 channel I2S, using adouble-edge clocked stereo PDM source, or two mono single-edged clocked PDM sources. Support for Left-Justified 2channel output using a double-edged clocked stereo PDM source or up to 8 channel TDM output (again using 4 stereodouble-edge clocked PDM sources) is also possible. Please refer to Table 1 below for configuration of these two pins. Note:When in 2 channel mode, the maximum SCLK to LRCLK ratio is 256. When in TDM mode, the SCLK to LRCLK ratio mustbe at least enough to support the number of desired channels at the specified word width. Support for an odd number ofwords is possible, however, please note that unused channel / data frames may contain invalid data.I2S Mode 0, 1 Channel Output Mode, Double-Edged Clocking on PDM SourcesI2S Mode 1, 2 Channel Output Mode, Single-Edged Clocking on PDM SourcesLeft-Justified, 2 Channel Output Mode, Double-Edged Clocking on PDM SourceTDM, up to 8 Channel Output Mode, Double-Edged Clocking on PDM Source2CH TDM1(Pin 4)2CH TDM2(Pin 2)00110101Table 1. Configuring the PCM Output Format using the 2CH TDM1 and 2CH TDM2 Pins1.2Configuring SCLK PolarityIf the SCLK POL pin(Pin1) is held HIGH, the SCLK polarity is inverted from standard I2S or LJ modes, whereby the data istransmitted on the rising edge of SCLK. If the SCLK POL pin is held LOW, data is transmitted on the falling edge of SCLK.1.3Configuring the PCM Word WidthThe WL MSB and WL LSB pins configure the TSDP18xx PCM word length. For configurations where the PCM WordLength is 32-bits, the rest of the data out to the 32-bit max word length is zero padded.The exact configuration for eachPCM Word Width is shown in Table 2.3 2019 Tempo Semiconductor, Inc.V0.97 -9/16/19TSDP18XX
TSDP18xxOctal PDM to 24-bit TDM ConverterPCM Word Length 32-bitsPCM Word Length 24-bitsReservedPCM Word Length 16-bitsWL MSB(Pin 16)WL LSB(Pin 15)00110101Table 2. PCM Word Length Configuration using WL MSB and WL LSB Pins1.4Configuring the OS MODE [3:1] pinsThe OS MODE3, OS MODE2, OS MODE1 pins configure the TSDP18xx FIR Decimation value for a Typical Fs range asshown in Table 3. In order to ensure valid output data, the designer must ensure that valid SCLK to LRCLK ratio is suppliedto the TSDP18xx with valid WL MSB and WL LSB versampleRateBandwidth at -1dB(Normalized)Typical FsRange (kHz)Valid SCLK / LRCLK Ratios for CorrespondingOS MODE Pin 45360.45360.45360.45360.4536N/AN/A256 to 384128 to 19264 to 9648 to 6432 to 4824 to 3216 to 248 to 168 to 12ReservedReserved32, 48, 64, 96, 12832, 48, 64, 96, 128, 192, 25632, 64, 96, 128, 192, 256, 384, 51248, 9664, 128, 192, 256, 384, 51296, 192128, 256, 384, 512192, 384256, 512Table 3. Configuring the Oversampling Mode using OS MODE3, OS MODE2, OS MODE1 Pins1.5Power Down and ResetThe TSDP18xx automatically powers down to use less than 1uA in standby mode and resets when the SCLK signal isremoved/stopped. The TSDP18xx can be reconfigured by stopping the SCLK, changing and holding the configuration pinswhile it is stopped then restart the SCLK. The SCLK must remain stopped for at least 100uS to guarantee that the internalreset is asserted and device is reinitialized correctly.4 2019 Tempo Semiconductor, Inc.V0.97 -9/16/19TSDP18XX
TSDP18xxOctal PDM to 24-bit TDM Converter2.0Device CharacteristicsDVDD IO 1.8 V, TA 25 C, PDM BCLK Output 3.072 MHz, LRCLK Input 48 kHz, TDM format, OS Rate 64x unlessotherwise noted. The PDM audio stream used in the Table 4was generated by the APx525 PDM Module, with a 5th ordernoise shaper. Measurements are without A-Weighting or AES-17 filter unless otherwise noted. The performance results arelimited by the measurement equipment and not the design. Please refer to the SNR / DNR / THD N Level footnote andcorresponding performance plots Figure 17, Figure 18 and Figure 19 as to how this measurement was captured.ParameterSymbolTest ConditionsMinTypMaxUnitDigital Input/Output0.7x DVDD IOInput High LevelVIHInput Low LevelVILOutput High LevelVOHIOH -1mAOutput Low LevelVOLIOH 1mAV0.3x DVDD IO0.9x DVDD IOV0.1x DVDD IOInput CapacitanceV5VpFInput Leakage, HighIIHPDM DAT, SCLK and LRCLK-0.90.9uAInput Leakage, LowIILPDM DAT, SCLK and LRCLK-0.90.9uASDATA Drive StrengthPDM CLK Drive StrengthRPU / RPDInternal Pull-Up ResistorAll Digital I/O pins with pull-up orpull-down4.5mA9mA50kΩESD / C1014ClassPerformanceSNR SNR / DNR / THD N LevelSNR, A-Weighted122THD N LevelTHD N Ratio, A-Weighted2Oversampling RateFilter RippleBandwidth20Hz to 20kHz, Ref to 0dB125.9126.4dB20Hz to 20kHz141.9142.4dB20Hz to 20kHz, Ref to 0dB130.6131.5dB20Hz to 20kHz123125dBFS20Hz to 20kHz, -60dBFS input70.370.5dBFSDepends on OS MODE Settings8256DC to 0.437 output Fs-0.15 0.01Rolloff at -1dBStop-BandStop-Band AttenuationGain0.4536Fs0.566Fs79PDM to PCMBit WidthInternalBit WidthOutputdB016Interchannel PhasedBFS0dB24Bits32BitsDegreesTable 4. TSDP18xx Device Characteristics5 2019 Tempo Semiconductor, Inc.V0.97 -9/16/19TSDP18XX
TSDP18xxOctal PDM to 24-bit TDM ConverterParameterSymbolTest ConditionsMinTypMaxUnitdV/dtMIN0.5x DVDD level must beachieved in at least in 5ms orless0.180.36V/msTSUFrom 0.9x DVDD and valid SCLKis presented to TSDP18xx tovalid PDM CLK signal is outputfrom TSDP18xx3LRCKCyclesTimingMinimum dV/dtStart UpClockingPDM CLK Output RangeFPDM CLK Depends on OS MODE Settings26.144MHz384kHz49.152MHzLRCLK Input RangeFLRCLKDepends on OS MODE Settings8SCLK Input RangeFSCLKDepends on OS MODE Settings0.256Depends on OS MODE Settings32SCLK / LRCLK Ratio3.072512Table 4. TSDP18xx Device Characteristics1. The 142dB SNR / DNR / THD N Level performance number was generated using a generated PDM data source.Please refer to Figure 17, Figure 18, and Figure 19 and the associated Figure text descriptions to learn more abouthow the PDM data source was generated and also how these measurements were taken.2 Performance limited by measurement equipmentOS MODE [3:1]Decimation FactorGroup (Fixed) DelayTypical Fs01084.5 Samples384kHz011169.75 Samples192kHz1xx32 18.375 Samples 96kHzTable 5. TSDP18xx Group (Fixed) Delay6 2019 Tempo Semiconductor, Inc.V0.97 -9/16/19TSDP18XX
TSDP18xxOctal PDM to 24-bit TDM Converter3.0Typical Performance Characteristics (from APx525)DVDD IO 1.8 V, TA 25 C, PDM BCLK Output 3.072 MHz, LRCLK Input 48 kHz, TDM format, OS Rate 64x unlessotherwise noted. PDM Generator is APx525 PDM Module, 5th order noise shaper, without A-Weighting or AES-17 filterunless otherwise noted.Figure 1. FFT, Fs 48kHz, -60dBFS InputFigure 2. FFT, Fs 48kHz, -10dBFS InputFigure 3. Filter Phase Response, Fs 48kHz, -10dBFSFigure 4. Filter Ripple, Fs 48kHz, -10dBFS Input7 2019 Tempo Semiconductor, Inc.V0.97 -9/16/19TSDP18XX
TSDP18xxOctal PDM to 24-bit TDM ConverterFigure 5. THD N vs Level, Fs 48kHz, -120 to 0dBFSFigure 6. THD N vs. Frequency, Fs 48kHz, -10dBFSFigure Note: Please note that the reason THD N vs. Level plot shows a spike in THD N starting around -7dBFS is dueto the fact that the Noise Shaper of the 5th 5th Order PDM Generator module in the APx525 goes unstable above-7dBFS and is not a reflection of the performance of the TSDP18xx.Figure 7. SNR, A-Weighted, Fs 48kHz, Ref to 0dBFigure 8. SNR, Unweighted, Fs 48kHz, Ref to 0dBFigure 9. SNR, Unweighted, Fs 48kHz, -10dBFS InputFigure 10. SNR, A-Weighted, Fs 48kHz, -10dBFS Input8 2019 Tempo Semiconductor, Inc.V0.97 -9/16/19TSDP18XX
TSDP18xxOctal PDM to 24-bit TDM ConverterFigure 11. SNR, Unweighted, Fs 48kHz, -60dBFS InputFigure 12. SNR, A-Weighted, Fs 48kHz, -60dBFS InputFigure 13. THD N, Unweighted, Fs 48kHz, -10dBFSInputFigure 14. THD N, A-Weighted, Fs 48kHz, -10dBFSInputFigure 15. THD N, Unweighted, Fs 48kHz, -60dBFSInputFigure 16. THD N, A-Weighted, Fs 48kHz, -60dBFSInput9 2019 Tempo Semiconductor, Inc.V0.97 -9/16/19TSDP18XX
TSDP18xxOctal PDM to 24-bit TDM Converter3.1Typical Performance Characteristics (from Generated PDM Source)DVDD IO 1.8 V, TA 25 C, PDM BCLK Output 3.072 MHz, LRCLK Input 48 kHz, I2S format, OS Rate 64x.PDM Input, Fs/2Peak Freq is 10745.5152Peak Power is 6.3156SNR is 8.46050Signal Magnitude 50 100 150 200 250 3000246810Frequency (Hz)1214165x 10Figure 18. FFT, Fs 48kHz, 0dBFS, 10.745kHz sine wave,Converted Linear PCM I2S Output from TSDP18xxFigure 17. Specialized PDM test signal carrying a10.745kHz sine waveFigure 19. Zoom In of Figure 1810 2019 Tempo Semiconductor, Inc.V0.97 -9/16/19TSDP18XX
TSDP18xxOctal PDM to 24-bit TDM Converter4.0QFN Package Lead Configuration and Function Descriptions16 17 18 19 20151142133GND124115109876Figure 20. TSDP18xx QFN Package Lead Configuration11 2019 Tempo Semiconductor, Inc.V0.97 -9/16/19TSDP18XX
TSDP18xxOctal PDM to 24-bit TDM ConverterLeadCountSignal NameTypeDescription1SCLK POLInput22CH TDM2InputIf HIGH, the data is transmitted on the rising edge of SCLK and sampled on thefalling edge of SCLK. If LOW, the data is transmitted on the falling edge of SCLKand sampled on the rising edge of SCLK.2CH TDM2 input pin used to configure the output PCM mode. Refer to Table1. Note: If the output format is 2-Channel, then the maximum SCLK to LRCLKratio supported is 256.3GNDGround42CH TDM1Input5GNDGround6OS MODE2InputInput pin used to configure the oversampling mode. Refer to Table 3.7OS MODE3InputInput pin used to configure the oversampling mode. Refer to the Table 3.8OS MODE1InputInput pin used to configure the oversampling mode. Refer to Table 3.9PDM DAT4InputPDM Data Input for stereo or mono DMICs10PDM DAT3InputPDM Data Input for stereo or mono DMICs11PDM DAT2InputPDM Data Input for stereo or mono DMICs12IOVDDSupplyIO Supply13PDM DAT1InputPDM Data Input for stereo or mono DMICs14PDM CLKOutput15WL LSBInputLSB in the Word Length configuration. Refer to Table 2.16WL MSBInputMSB in the Word Length configuration. Refer to Table 2.17SCLKInputSerial Bit Clock for I2S/TDM18SDATAOutputSerial Data Output for High Fs I2S/TDM19DVDDSupplyCore Supply20LRCLKInputLeft/Right Clock for I2S/Frame Sync for TDMGround2CH TDM1 input pin used to configure the output PCM mode. Refer to Table1. Note: If the output format is 2-Channel, then the maximum SCLK to LRCLKratio supported is 256.GroundPDM Clock Output for all DMICsTable 6. QFN Package Lead Function Descriptions12 2019 Tempo Semiconductor, Inc.V0.97 -9/16/19TSDP18XX
TSDP18xxOctal PDM to 24-bit TDM Converter5.0QFN Package Mechanical SpecificationsFigure 21. 3mm x 3mm, 20-lead, 0.4mm pitch QFN Package Mechanical Drawing (Note: Drawing Not to Scale)13 2019 Tempo Semiconductor, Inc.V0.97 -9/16/19TSDP18XX
TSDP18xxOctal PDM to 24-bit TDM Converter6.0Audio Data FormatsThe TSDP18xx supports single bit PDM input sources with wide range of frequencies and a comprehensive output formatand bit width6.1Audio Input FormatThe versatile TSDP18xx supports both double edge clocked PDM input as well as single edge PDM input. The details of thetiming are shown in sections 6.1.1 and 6.1.2.6.1.1Double-Edge Clocked PDM Input TimingThe PDM CLK signals to the DMIC are provided at an Fs determined by OS MODE1, 2, 3 pins, provided valid LRCLK andSCLK signals are made available. For I2S Mode 1, Left-Justified and TDM modes, the TSDP18xx supports the industrystandard double clock-edge latching as shown in Figure 1 and corresponding Table 1PDM CLKtHOLDtSETUPLPDM DATRLRFigure 1. Doubled-edged Clocked PDM Timing DiagramtMAXParametertMINData Setup Time, tSETUP7nsData Setup Time, tHOLD4nsUnitTable 1. Double-Edge Clocked PDM Input TimingPlease note that the Right Channel PDM data is latched into the TSDP18xx on the falling edge of the PDM CLK while theLeft Channel of the PDM data is latched into the TSDP18xx on the rising edge of the PDM CLK. Also note that this mode isonly applicable to 3 out of the 4 possible PCM output modes (I2S Mode 1, LJ and TDM). I2S Mode 2 employs thesingled-edge clocked PDM timing as shown in Figure 2.6.1.2Single-Edge Clocked PDM Input TimingWhen the 2CH TDM1 and 2CH TDM2 pins are configured for I2S Mode 2, the PDM CLK signals to the DMIC are providedat an Fs determined by OS MODE1, 2, 3 pins, provided valid LRCLK and SCLK signals are available. The TSDP18xx alsosupports the lesser used industry standard single clock-edge latching as shown in Figure 2 and corresponding Table 2:PDM CLKtHOLDtSETUPPDM DATL or R14 2019 Tempo Semiconductor, Inc.L or RV0.97 -9/16/19TSDP18XX
TSDP18xxOctal PDM to 24-bit TDM ConverterFigure 2. Single-Edged Clocked PDM Timing DiagramtMAXParametertMINData Setup Time, tSETUP7nsData Setup Time, tHOLD4nsUnitTable 2. Single-Edge Clocked PDM Input TimingWhen the single edge PDM clock mode is selected, the left channel will be taken from PDM DAT2 and the right channelfrom PDM DAT1.6.2Audio Output FormatsFor the Digital Audio Output, the TSDP18xx supports 3 standard audio interface formats, with a broad level of configurationvia pin strappings, which enhances compatibility to meet most audio DSP or SOC based systems.6.2.1Left Justified Audio OutputThe TSDP18xx Left Justified mode is conformant with the standard specification as shown in Figure 3. In particular, theMSB is available on the first rising edge of SCLK following a LRCLK transition. The other bits are then transmitted in order.The LRCLK signal is high when left channel data is present and low when right channel data is present. In Figure 3, theSCLK POL pin is LOW, showing standard polarity of the SCLK signal for the LJ format.1/FsLeft-JustifiedLeft ChannelRight ChannelLRCLKSCLKSDATA123n-2 n-1MSBn1LSB23n-2 n-1MSBnLSBWord Length (WL)Figure 3. Left-Justified Audio Interface (assuming n-bit word lengths)15 2019 Tempo Semiconductor, Inc.V0.97 -9/16/19TSDP18XX
TSDP18xxOctal PDM to 24-bit TDM Converter6.2.2I2S Format Audio OutputThe TSDP18xx I2S mode is conformant with the standard specification as shown in Figure 4. In particular, the MSB isavailable on the second rising edge of BCLK following a LRCLK transition. The other bits up to the LSB are then transmittedin order. In Figure 4, the SCLK POL pin is LOW, showing standard polarity of the SCLK signal for the I2S format.I 2S1/FsLeft ChannelRight ChannelLRCLKSCLK1 SCLKSDATA121 SCLK3n-2 n-1MSBnLSB123MSBn-2 n-1nLSBWord Length (WL)Figure 4. I2S Justified Audio Interface (assuming n-bit word length)16 2019 Tempo Semiconductor, Inc.V0.97 -9/16/19TSDP18XX
TSDP18xxOctal PDM to 24-bit TDM Converter6.2.3TDM Format Audio OutputTDM is a mechanism for transmitting or receiving multiple channels of audio information over a single data connection.When the TSDP18xx is in TDM mode, the SDOUT pin is used to output TDM data.TDM data is transferred MSB first and the SCLK to FRMCLK (serial bit clock / frame clock) ratio can be any supported ratefrom 32Fs up to 512Fs, provided that SCLK 49.152MHz and the word-length set by WL MSB and WL LSB does notexceed the total number of SCLKs available to clock out the total number of data bits desired. The digital audio output portsupports up to eight, 32-bit, 24-bit or 16-bit time slots (MSB justified within a slot).The audio data is left-justified within the time slot by padding the unused bits with zeros, when the word length is 32-bits.Valid audio data word lengths are 32, 24, or 16 bits.Either short or word-length frame syncs can be accepted.If SCLK POL is LOW, data is transmitted on the rising edge of SCLK, otherwise, data is transmitted on the falling edge ofSCLK. Data should be sampled on the opposite clock edge by the receiver.The LRCLK signal provides the frame sync pulse and will be a single bit clock in length to start the frame when configuredfor TDM modes, otherwise it defaults to I2S format and frames the left and right channels.6.2.3.1 SCLK, LRCK, Word Length & PCM Word Slot AvailabilityFor certain applications there may be a need for an uneven number of DMICs (7, 5, 3 or 1) and/or the PCM output wordwidths is 24-bits. The following shows how the TSDP18xx operates for uneven DMICs and/or 24bit word width:After a maximum of 8 slots have been output from the TSDP18xx when in TDM mode or 2 slots when in I2S or LJ mode, thedevice just continues to clock out zeros.If the slot count is not an integer value, as indicated in Table 3 below by the numbers with an “*” next to them, the device willautomatically sync back up once all SCLKs have taken place within that TDM frame.A valid configuration for 5 DMICs with a 24-bit word length is one that offers a 128 SCLK to LRCLK ratio. In this case, therewill be 5 24-bit word slots plus 8 extra cycles, however, please note that the data in the extra 8 cycles may be undefined.Ignoring the right frame data when in I2S or LJ mode, or all other word slots other than the first in TDM mode can supportsystems that have less than 2 DMICs.Using multiple TSDP18xx devices, each with their own TDM bus can support systems that have more then 8 DMICs.Valid PCM Word Slots in TDM ModeSCLK to LRCLK N/A2488885*42*2N/A16888886432Table 3. TDM Mode PCM Word Slot Availability based on SCLK to LRCLK Ratio and Word Length17 2019 Tempo Semiconductor, Inc.V0.97 -9/16/19TSDP18XX
TSDP18xxOctal PDM to 24-bit TDM Converter6.2.4Standard SCLK Polarity, TDM Audio OutputIn TDM mode, the MSB is available on the first rising edge of SCLK following a FRMCLK transition. The other bits up to theLSB are then transmitted in order. The frame sync pulse must be present for at least one SCLK cycle, or may be continuefor up to the duration of a word length, as shown by the dashed line in Figure 5.Figure 5. TDM Audio Output (Standard Polarity)18 2019 Tempo Semiconductor, Inc.V0.97 -9/16/19TSDP18XX
TSDP18xxOctal PDM to 24-bit TDM Converter6.2.5Inverted SCLK Polarity, TDM Audio OutputIn TDM mode, the MSB is available on the first falling edge of BCLK following a FRMCLK transition. The other bits up to theLSB are then transmitted in order.The frame sync pulse must be present for at least one SCLK cycle, or may be continue forup to the duration of a word length, as shown by the dashed line in Figure 27.Figure 6. TDM Audio Output (Inverted Polarity)19 2019 Tempo Semiconductor, Inc.V0.97 -9/16/19TSDP18XX
TSDP18xxOctal PDM to 24-bit TDM Converter7.0Ordering P18xx -EVALTSDP1808X1NEGXZAXTSDP1808X1NEGIZAXCommercial Temp (0C 70C), 3x3mm, 20-lead, 0.4mm pitch QFN package, Tape & ReelIndustrial Temp (-40C 85C), 3x3mm, 20-lead, 0.4mm pitch QFN package, Tape & ReelTSDP18xx Evaluation Board using 20-lead QFN, Commercial TempCommercial Temp (0C 70C), 3x3mm, 20-lead, 0.4mm pitch QFN package, TrayIndustrial Temp (-40C 85C), 3x3mm, 20-lead, 0.4mm pitch QFN package, TrayPlease contact sales@temposemi.com for more information on lead times.19 2019 Tempo Semiconductor, Inc.V0.97 -9/16/19TSDP18XX
TSDP18xxOctal PDM to 24-bit TDM Converter8.0Revision ed text0.968/6/201918,19Edited diagrams0.955/22/2019pages 1 ,3, 4,5, 16,17,18Edited text and diagrams0.864/10/2019page 19edited text and description on section 1 and0.8510/3/2018page 19added parts in ordering and removed confidential.0.849/26/2018page 19Updated part number0.837/6/2018Pages 1, 3.Updated text on pages 1, 3, 4, and 16. Updated page number on TOC (should have been page 2).0.826/26/2018Pages 9, 10.Added Section 3.1 to page 9 along with 3 new figures and text showing supporting measurements for the 142dBSNR / DNR / THD N Level performance numbers. Added “GND” text indicator to landing pad in Figure 20,“TSDP18xx QFN Package Lead Configuration,” on page 11.0.816/20/2018Page 1Updated first page formatting. Updated max SNR number to 142dB based on latest performance measurements.0.83/29/2018Added 1 newpage: 17Added three pages to support new 3mm x 3mm, 20-lead, 0.4mm pitch QFN package pinout diagram, functiondescription table, and mechanical drawing. Added ordering information page. Shortened Revision History table,removing details about revisions 0.1 to 0.4. Removed 2mm x 2mm, 20-ball, 0.4mm pitch BGA package pinoutdisgram, function description table, and mechanical drawing. Fixed date year typo on 0.5 rev history.0.73/9/2018Updated9,10, 12Added page11Updated Package Pin Diargram & Pin Function Description Table to reflect finalized A0 design. Added mechanicalpackage drawing to page 11. Updated maximum SCLK to LRCLK ratio when in I2S or LJ modes to be 128 instead of256 on page 12. Added additional valid SCLK to FRMCLK ratios for TDM modes of 96, 64 and 48 to Figures 24 and25.0.62/20/2017VariousDVDD IO voltage is now limited to operating at either 1.8V ( /- 5%) or 3.3V ( /-5%). Replaced tPOR row in table withdV/dtMIN as this data was deemed more important to the board designer. In order for device to reset as well as gointo standby mode, the SCLK signal must not be present. In previous versions of the data sheet, supplying an SLCKwith a frequency of 256kHz triggered this event. Tempo Semiconductor, Inc.https://www.temposemi.com8627 N. MoPac Expwy, Suite 130Austin, Texas 78759DISCLAIMER Tempo Semiconductor, Inc. (TSI) and its subsidiaries reserve the right to modify the products and/or specifications describedherein at any time and at TSI’s sole discretion. All information in this document, including descriptions of product features and performance,is subject to change without notice. Performance specifications and the operating parameters of the described products are determined inthe independent state and are not guaranteed to perform the same way when installed in customer products. The information containedherein is provided without representation or warranty of any kind, whether express or implied, including, but not limited to, the suitability ofTSI’s products for any particular pu
OCTAL PDM TO 24-BIT TDM CONVERTER TSDP18xx 1 V0.97 -9/16/19 2019 Tempo Semiconductor, Inc. TSDP18XX GENERAL DESCRIPTION The TSDP18xx is an ultra low-power, high-performance, 8 channel PDM to Linear PCM converter. It supports Digital MEMS Microphone (DMIC) over sample rates up to 6.144MHz; and output sampling rates of 8KHz up to
2.4. Octal system Like the hexadecimal number system, the octal number system provides a convenient way to express binary number and codes. One octal digit is a decimal representation of a group of 3-bit. Therefore, the octal number system is a base of 8 (23 8) system composed of eight digits: 0,1,2,3,4,5,6,7. Example 2.4. - Octal number .
PDM. vs. PLM: It All Starts with PDM. SUMMARY. Product data management (PDM) or product lifecycle management (PLM)–which system best fits the needs of your manufacturing organi-zation? Although both solutions rely on a solid PDM foundation, select-ing the right one from the many PDM and PLM systems available today can be challenging.
GE Marquette Monitors with PDM Port, e.g. Solar 8000, CARESCAPE B450, CARESCAPE B650, CARESCAPE B850 9 -way PDM Port (special) Plug Li11064 05060110522248 Cable Assembly, USB ADC to GE PDM Port Note: When the PDM module is plugged into the CARESCAPE 450, 650 or 850 th
Workgroup PDM – Transition Survival Guide Part 1: Projects to Folders Workgroup PDM is going the way of the steamship, the rotary telephone and the sundial, but . enhanced world of the PDM vault, they get extra superpowers as well. At first glance, they may be confusing to long time Workgroup users, but with a little experience .
Predictive Maintenance (PDM) PDM evaluates the existing equipment condition and based on a projected trend of the deterioration, failures are predicted and appropriate steps are taken. PDM discovers potential problems before the eye can see, the ear can hear, or the nose can smell. PDM requires a great investment in time, advanced
Windows XP Professional 32-Bit/64-Bit, Windows Vista Business 32-Bit/64-Bit, Red Hat Enterprise Linux WS v4.0 32-bit/64-bit, Red Hat Enterprise Desktop v5.0 32-bit/64-bit (with Workstation Option), SUSE Linux Enterprise (SLE) desktop and server v10.1 32-bit/64-bit Resources Configuration LUTs
8127FS–AVR–02/2013 4. Register Summary Note: 1. For compatibility with future devices, reserved bits should be written to zero if accessed. Reserved I/O memory addresses Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Page 0x3F SREG I T H S V N Z C Page 12 0x3E SPH Stack Poin
not know; am I my brother’s keeper?’ (Genesis 4:9) N NOVEMBER 2014 the Obama administration in the United States announced an extension of relief for immigrant families, prompting one cartoonist to caricature ‘an immigrant family climbing through a window to crash a white family’s Thanksgiving dinner’ with the ‘white father unhappily telling his family, “Thanks to the president .
