AS3932-BTST austriamicrosystems, AS3932-BTST Datasheet
AS3932-BTST
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AS3932-BTST Summary of contents
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... Datasheet General Description The AS3932 is a 3-channel low power ASK receiver that is able to generate a wakeup upon detection of a data signal which uses a LF carrier frequency between 110 - 150 kHz. The integrated correlator can be used for detection of a programmable 16-bit wakeup pattern. ...
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... AS3932 Datasheet - Figure 1. AS3932 Typical Application Diagram with Crystal Oscillator VCC CBAT TRANSMITTER TX Figure 2. AS3932 Typical Application Diagram with RC Oscillator CBAT TRANSMITTER TX www.austriamicrosystems.com/LF-Receiver/AS3932 VCC CL XIN XTAL XOUT LF1P LF2P LF3P LFN VSS VCC VCC XIN XOUT LF1P LF2P LF3P LFN VSS Revision 1 ...
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... AS3932 Datasheet - Figure 3. AS3932 Typical Application Diagram with Clock from External Source VCC CBAT EXTERNAL CLOCK TRANSMITTER TX www.austriamicrosystems.com/LF-Receiver/AS3932 VCC R XIN C XOUT LF1P AS3932 LF2P LF3P LFN VSS Revision 1.4 CS CL_DAT DAT WAKE SCL SDO SDI GND ...
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... Single Pattern Detection (Manchester decoder enabled) .......................................................................................................... 27 8.7 False Wakeup Register ...................................................................................................................................................................... 27 8.8 Real Time Clock (RTC)....................................................................................................................................................................... 28 8.8.1 Crystal Oscillator........................................................................................................................................................................ 29 8.8.2 RC-Oscillator ............................................................................................................................................................................. 29 8.8.3 External Clock Source ............................................................................................................................................................... 30 8.9 Channel Selection in Scanning Mode and ON/OFF Mode ................................................................................................................. 30 9 Package Drawings and Markings ........................................................................................................................................... 10 Ordering Information............................................................................................................................................................. www.austriamicrosystems.com/LF-Receiver/AS3932 Revision 1 ...
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... WAKE 14 DAT 15 CL_DAT 16 www.austriamicrosystems.com/LF-Receiver/AS3932 AS3932 Pin Type Digital input SDI data output (tristate when CS is low) Supply pad Supply pad Input antenna channel three Input antenna channel two Input antenna channel one Analog I/O Common ground for antenna one, two and three ...
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... SDI 13 SDO 14 Digital output / tristate GND 16 www.austriamicrosystems.com/LF-Receiver/AS3932 AS3932 Pin Type Input antenna channel three Input antenna channel two Input antenna channel one Analog I/O Common ground for antenna one, two and three Supply pad Digital output Manchester recovered clock Digital input ...
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... Storage temperature (T ) strg Package body temperature (T ) body Humidity non-condensing 1. The reflow peak soldering temperature (body temperature) is specified according IPC/JEDEC J-STD-020C “Moisture/Reflow Sensitivity Classification for Nonhermetic Solid State Surface Mount Devices”. www.austriamicrosystems.com/LF-Receiver/AS3932 Electrical Characteristics on page 8 Min Max Units -0 -0 -100 ...
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... RC- oscillator as RTC Current Consumption in standard listening mode with I3CHRC three active channels and RC- oscillator as RTC www.austriamicrosystems.com/LF-Receiver/AS3932 Conditions With a load current of 1mA With a load current of 1mA For a clock frequency of 1 MHz With a load current of 1mA With a load current of 1mA ...
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... Frequency FRCCALMAX FRCCALMIN Frequency TCALRC Calibration time IRC Current consumption www.austriamicrosystems.com/LF-Receiver/AS3932 Conditions 11% Duty Cycle 50% Duty Cycle With 125 kHz carrier frequency and 1 kbps data-rate. No load on the output pins. With 125 kHz carrier frequency, chip in default mode, 4 half bits burst + 4 symbols preamble ...
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... Supply Voltage [V] Figure 8. RC-Osc Frequency over Voltage (calibr.) 34.5 34 33.5 33 32.5 32 31.5 31 2.4 2.6 2.8 3 3.2 Supply Voltage [V] www.austriamicrosystems.com/LF-Receiver/AS3932 Figure 7. Sensitivity over RSSI 1000000 100000 10000 1000 100 3.6 Figure 9. RC-Osc Frequency over Temperature (calibr.) 34.5 34 33.5 33 32.5 32 31.5 31 -36 -30 -20 -10 3 ...
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... Datasheet - Detailed Description The AS3932 is a three-dimensional low power low-frequency wakeup receiver. The AS3932 is capable to detect the presence of an inductive coupled carrier and extract the envelope of the On-Off-Keying (OOK) modulated carrier. In case the carrier is Manchester coded the clock is recovered from the transmitted signal and the data can be correlated with a programmed pattern. If the detected pattern corresponds to the stored one a wake-up signal (IRQ) is risen up ...
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... This channel rotation goes on until the presence of the carrier is detected by any of the channels; then immediately all three channels will become active at the same time. Now AS3932 can perform a simultaneous multidirectional evaluation (on all three channels) of the field and evaluate which channel has the strongest RSSI. The channel with the highest RSSI will be put through to the demodulator. In this way it is possible to perform multidirectional monitoring of the field with a current consumption of a single channel, keeping the sensitivity as good as if all channels are active at the same time ...
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... OOK receiver. The data is provided on the DAT pin and in case the Manchester decoder is enabled see clock is present on the CL_DAT possible to put the chip back to listening mode either with a direct command (CLEAR_WAKE or by using the timeout feature. This feature automatically sets the chip back to listening mode after a certain time www.austriamicrosystems.com/LF-Receiver/AS3932 . R4<7:6> ...
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... R1<5> AGC_UD W R1<4> ATT_ON W R1<3> EN_MANCH W R1<2> EN_PAT2 W R1<1> EN_WPAT W R1<0> EN_RTC W R2<7> S_ABSH W R2<6:5> W_PAT W R2<4:2> www.austriamicrosystems.com/LF-Receiver/AS3932 MUX_123 EN_A2 AGC_UD ATT_ON EN_MANCH Reserved FS_SLC<2:0> R_VAL<1:0> TS2<7:0> TS1<7:0> n.a. Reserved F_WAKE Default Value 0 On/Off operation mode. (Duty-cycle defined in the register R4<7:6> ...
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... RSSI1 R R11<4:0> RSSI2 R R12<4:0> RSSI3 R R13<7:0> F_WAK WR www.austriamicrosystems.com/LF-Receiver/AS3932 Default Value 00 Tolerance setting for the stage wakeup Data slicer hysteresis 0 if HY_20m = 0 then comparator hysteresis = 40mV if HY_20m = 1 then comparator hysteresis = 20mV Data slicer hysteresis only on positive edges (HY_POS=0, hysteresis on both 0 edges, HY_POS=1, hysteresis only on positive edges) ...
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... AS3932 Datasheet - 8.2.3 Serial Data Interface (SDI) This 4-wires interface is used by the Microcontroller (µC) to program the AS3932. The maximum clock frequency of the SDI is 2MHz. Table 8. Serial Data Interface (SDI) pins Name Signal CS Digital Input with pull down SDI Digital Input with pull down ...
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... A CS toggling high-low-high indicates the end of the WRITE command after register has been written. The following example shows a write command. Figure 13. Writing of a Single Byte (falling edge sampling) CS SCLK SDI SCLK raising Two leading edge Data is Zeros indicate transfered from WRITE Mode µC www.austriamicrosystems.com/LF-Receiver/AS3932 B10 B13 B12 ...
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... To transfer bytes from consecutive addresses, SDI master has to keep the CS signal high and the SCLK clock has to be active as long as data need to be read. Figure 15. Reading of Single Register Byte CS SCLK SDI SDO X SCLK raising 01 pattern edge Dat a is indicates transfered from READ Mode µC www.austriamicrosystems.com/LF-Receiver/AS3932 ...
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... THCL SCL High Time TCL SCL period Time Sampling Data to CS TCLKCS down TCST CS Toggling time Figure 17. SDI Timing Diagram CS TCSCLK SPI TDCLK SCL THC L TCLK www.austriamicrosystems.com/LF-Receiver/AS3932 Conditions Min Typ 500 300 200 1 500 500 TCLKCS Revision 1.4 Max Units µs ...
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... In this way it is possible to reduce the false frequency detection. Table 15. Bit Setting of Gain Reduction R4<3> R4<2> R4<1> R4<0> www.austriamicrosystems.com/LF-Receiver/AS3932 R2<0> Gain reduction 0 no gain reduction 1 Revision 1.4 Tolerance relaxed tighter (medium) stringent reserved n.a. n.a. -4dB -8dB -12dB -16dB -20dB -24dB ...
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... Table 18. Bit Setup for the Data Slicer for Different Preamble Length R3<5> R3<4> www.austriamicrosystems.com/LF-Receiver/AS3932 Table 16 shows the bit setup. R4<4> Shunt resistor (parallel to the resonator at 125 kHz R3<0> Symbol rate [Manchester symbols/ gives a correlation between data slicer setup and minimum required preamble length. ...
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... Table 19) and if no preamble is detected the chip is set back to Table 19 as function of the Real Time Clock (RTC) periods. Bit duration in RTC R7<0> Bit rate (bits/s) clock periods Revision 1.4 Symbol rate (Manchester symbols/s) 8192 4096 6552 3276 5460 2730 4680 ...
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... Figure 18. Synchronization of Data with Recovered Manchester Clock CL_DAT DAT If the pattern detection fails the internal wake-up (on all active channels) is terminated with no signal sent to MCU and the false wakeup register will be incremented (R13<7:0>). www.austriamicrosystems.com/LF-Receiver/AS3932 Bit duration in RTC R7<0> Bit rate (bits/s) clock periods ...
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... Without Pattern Detection (Manchester decoder disabled) Figure 19. Wakeup Protocol Overview without Pattern Detection (only carrier frequency detection, Manchester decoder disabled) www.austriamicrosystems.com/LF-Receiver/AS3932 Table 12. This command terminates the MCU activity. The termination R7<5> Time out msec 0 100 msec 1 150 msec 0 200 msec ...
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... In case the data correlation is disabled (R1<1>=0) the AS3932 wakes up upon detection of the carrier frequency only as shown in order to ensure that AS3932 wakes up the carrier burst has to last longer than 550 µs. To set AS3932 back to listening mode there are two possibilities: either the microcontroller sends the direct command clear_wake via SDI or the time out option is used (R7<7:5>). In case the latter is chosen, AS3932 is automatically set to listening mode after the time defined in T_OUT (R7< ...
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... Maximum duration of the carrier burst in ON/OFF Mode 4.88 5.37 5.86 6.34 6.83 7.32 7.81 8.30 8.79 9.28 9.76 10.25 10.75 11.23 11.73 12.21 12 ...
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... Most wakeup receivers have to deal with environments that can rapidly change. By periodically monitoring the number of false wakeup events it is possible to adapt the system setup to the actual characteristics of the environment and enables a better use of the full flexibility of AS3932. Note: If the Manchester decoder is enabled, the false wakeup register is not able anymore to store the false wakeup events. ...
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... RC oscillator) should be about one forth of the carrier frequency: Where the carrier frequency and F CAR The third option for the RTC is the use of an external clock source, which must be applied directly to the XIN pin (XOUT floating). www.austriamicrosystems.com/LF-Receiver/AS3932 Wakeup Level 1 Pattern Correlator False wakeup Register Setup ...
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... The calibration is effective after the 65th reference clock edge and it will be stored in a volatile memory. In case the RC-oscillator is switched off or a power-on-reset happens (e.g. battery change) the calibration has to be repeated. Figure 23. RC-Oscillator Calibration via SDI www.austriamicrosystems.com/LF-Receiver/AS3932 Conditions Min Overall accuracy ...
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... External Clock Source To clock the AS3932 with an external signal the crystal oscillator has to be enabled (R1<1>=1). As shown in the applied on the pin XIN while the pin XOUT must stay floating. The RC time constant has to be 15µs with a tolerance of ±10% (e.g. R=680 kΩ ...
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... C 0.09 - 0.20 C1 0.09 0.127 0.16 D See Variations E1 4.30 4.40 4.50 e 0.65 BSC www.austriamicrosystems.com/LF-Receiver/AS3932 Symbol Min Typ E L 0.50 0.60 a 0º 4º See Variations Variations: D AA/AAT 2.90 3.00 3.10 AB-1/ABT-1 4.90 5.00 5.10 AB/ABT 4.90 5 ...
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... Dimensions P and P1 are thermally enhanced variations. Values shown are maximum size of exposed pad within lead count and body size. End user should verify available size of exposed pad for specific device application. 12. All dimensions are in millimeters, angle is in degrees. 13 the total number of terminals. www.austriamicrosystems.com/LF-Receiver/AS3932 Revision 1 ...
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... Dimensioning and tolerances conform to ASME Y14.5M-1994. 3. Dimension b applies to metallized terminal and is measured between 0.25mm and 0.30mm from terminal tip. Dimension L1 represents terminal full back from package edge up to 0.1mm is acceptable. 4. Coplanarity applies to the exposed heat slug as well as the terminal. 5. Radius on terminal is optional www.austriamicrosystems.com/LF-Receiver/AS3932 ...
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... Wakeup Protocol - Carrier Frequency 125 kHz 8.6 8.8.2 RC-Oscillator on page 29 Updated Key Features for External Clock Added Figure 3 AS3932 Typical Application Diagram with Clock from External Source Added External Clock Source in Electrical System SpecificationsTable 5 Deleted table Minimum duration of carrier burst in ON/OFF mode (Manchester decoder ...
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... Ordering Information The devices are available as the standard products shown in Table 29. Ordering Information Ordering Code Type AS3932-BTST 16 pin TSSOP AS3932-BQFT QFN 4x4 16LD 1. Dry Pack Sensitivity Level =3 according to IPC/JEDEC J-STD-033A for full reels. Note: All products are RoHS compliant and austriamicrosystems green. ...
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... No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or other services. Contact Information Headquarters austriamicrosystems AG Tobelbaderstrasse 30 A-8141 Unterpremstaetten, Austria Tel: +43 (0) 3136 500 0 Fax: +43 (0) 3136 525 01 For Sales Offices, Distributors and Representatives, please visit: http://www.austriamicrosystems.com/contact www.austriamicrosystems.com/LF-Receiver/AS3932 Revision 1 ...