ST X-NUCLEO-AMICAM1, User Manual

Page 1: ...tor layout and with analog microphone coupon boards e g STEVAL MIC004V1 The X NUCLEO AMICAM1 embeds three MP23ABS1 microphones two connected to an external ADC and one directly routed to the STM32 embedded ADC The analog amplification stage is achieved thanks to ST TSV91x wide bandwidth operational amplifiers Figure 1 X NUCLEO AMICAM1 expansion board Getting started with the X NUCLEO AMICAM1 analo...

Page 2: ... with ST morpho connectors top and bottom and Arduino UNO R3 connectors top to allow stacking of multiple boards RoHS and WEEE compliant The X NUCLEO AMICAM1 expansion board implements an amplification stage for each microphone based on TSV91x operational amplifiers and allows microphone recording using either a dedicated third party external analog to digital converter mounted on board or the emb...

Page 3: ...e 3 X NUCLEO AMICAM1 expansion board block diagram High bandwidth Op MP23ABS1 Microphone External Ext MIC I2S Analog TSV91x Internal High bandwidth Op High bandwidth Op High bandwidth Op DFSDM Microphone MP23ABS1 Analog Microphone Analog Analog Amp TSV91x MP23ABS1 High bandwidth Op ADC Amp connector TSV91x Amp TSV91x Amp TSV91x ADC SPI USB Sensing Connectivity Amp Processing Ext MIC connector Ext ...

Page 4: ...LEO AMICAM1 expansion board power supply scheme Figure 4 X NUCLEO AMICAM1 expansion board amplification of a single microphone R1 A2V5 R2 INTREF_BUFF M1 R3 R4 R5 C1 M1 INTREF_BUFF 1 25 V The first operational amplifier is used as a buffer for the bias signal generated by a voltage divider with R1 equal to R2 the second one adds a gain equal to 1 R4 R3 to the microphone signal which is then routed ...

Page 5: ...al to R4 simply adds a phase shift of 180 degrees to the amplified signal The COMM represents the bias provided by the external ADC which is controlled by an SPI interface and microphone data are acquired by the STM32 through an I S interface 2 3 Power scheme Power scheme is designed to provide separate supplies to the critical analog parts which you can find on both the X NUCLEO AMICAM1 and the S...

Page 6: ...efault to enable this feature two actions are required unsolder a solder bridge on the STM32 Nucleo the solder bridge depends on the STM32 Nucleo type as detailed in Section 3 1 2 Single microphone acquisition configuration close J2 header Caution Do not close J2 if the proper solder bridge is not open on the STM32 Nucleo board as the STM32 Nucleo and the X NUCLEO AMICAM1 expansion board could be ...

Page 7: ...PI MOSI to external ADC SB13 SPI MISO from external ADC SB14 SPI clock SB15 I S bit clock to external ADC SB16 I S master clock to external ADC SB18 USB DP signal SB19 USB DM signal SB20 I S serial data 2 from external ADC SB21 I S bit clock to external ADC SB22 Microphone coupon M1 connected to external ADC SB23 On board microphone M1OB connected to external ADC SB24 Microphone coupon M2 connecte...

Page 8: ...14 OTG_FS_DM_NUCLEO 15 SPI1_MOSI 19 I2S_MCLK 20 GND 25 I2S_CK 26 I2S_SD2 30 I2S_CK 32 AGND Table 3 X NUCLEO AMICAM1 expansion board Arduino connectors Connector Pin Signal Remarks CN6 2 3V3 3 NRST 4 3V3 5 5V 6 GND 7 GND 8 V_IN CN8 1 M5 CN5 2 I2S_MCLK 4 SPI_MOSI 5 SPI_MISO 6 SPI_SCK 7 GND 8 A2V5 If J2 is closed CN9 7 I2S_CK UM2649 Connectors UM2649 Rev 2 page 8 18 ...

Page 9: ...om the ADC Step 2 Close SB23 and SB25 to connect M1 and M2 external headers to the ADC Step 3 Mount coupon boards on the headers Caution Do not close SB23 and SB24 at the same time to avoid potential shortcircuit between M1OB on board microphone and M1 external microphone if the coupon is mounted Do not close SB25 and SB26 at the same time it will result in a potential shortcut between M2OB onboar...

Page 10: ...Ceramic capacitors not mounted Yageo CC0402KRX7R7BB103 8 1 C20 39 nF 25 V X7R 10 0402 1005 Metric Ceramic capacitor Murata GRM155R71E393KA88D 9 1 C21 47 µF 10 V X5R 20 0805 2012 Metric Ceramic capacitor Taiyo Yuden LMK212BBJ476MG T 10 1 C23 2 2 nF 16 V X7R 10 0402 1005 Metric Ceramic capacitor Wurth Elektronik 885000000000 11 1 C27 10 µF 10 V X5R 10 0805 2012 Metric Ceramic capacitor Samsung Elect...

Page 11: ...RKF3321X 26 9 R16 R22 R23 R24 R30 R31 R34 R35 R37 56 K OHM 1 0 12 W 0402 1005 Metric SMD resistors TE Connectivity CRGP0402F56K 27 1 R17 160 OHM 1 1 16 W 0402 1005 Metric SMD resistor TE Connectivity CPF0402B160RE1 28 1 R18 4 7 K OHM 1 1 16 W 0402 1005 Metric SMD resistor ROHM MCR01MZPF4701 29 1 R19 100 K OHM 1 0 12 W 0402 1005 Metric SMD resistor TE Connectivity CRGP0402F100K 30 4 R26 R27 R39 R40...

Page 12: ...C6 ESD protection for USB 2 0 high speed ST USBLC6 2SC6 38 1 U4 AD1974 4 channel differential ADC Analog Devices AD1974YSTZ 39 1 U5 TSV912 Wide bandwidth 8MHz rail to rail input output 5 V CMOS Op Amps dual ST TSV912 40 2 U6 U7 TSV914 Wide bandwidth 8MHz rail to rail input output 5 V CMOS Op Amps quad ST TSV914 UM2649 Bill of materials UM2649 Rev 2 page 12 18 ...

Page 13: ...EO 10 SB18 6 11 13 37 2 M5 35 37 3 5 15 2 36 9 20 8 SB20 I2S_CK SPI_CS 24 SB15 35 26 12 17 19 1 4 0R 16 16 I2S_MCLK 7 7 SB12 23 38 SPI_MOSI NC SB16 5 7 14 SPI1_MOSI 15 SPI1_SCK CN6 I2S_MCLK CN10 3 14 SB14 6 SB11 1 22 21 9 I2S_SD1 31 A2V5 7 CN7 18 HEADER 19x2 2 6 NC 25 2 8 J2 4 24 28 30 29 26 I2S_SD2 NC 4 21 2 38 9 5VV_IN 10 5 1 31 33 3 7 34 36 11 5 6 13 5 25 20 22 SPI_SCK I2S_WS 32 1 CN8 27 4 SB21...

Page 14: ...C3 8 43 ADC2LP 44 R4 NC5 100nF ALRCLK CIN 23 C25 C14 M1 2 D2 3 CLATCH 27 R80 C30 NC ADC M3 possible SH3 8 D1 1 A2V5 1 V_USB I2S_CK DVDD AVDD 2 2nF 1µF MCLKI XI 3 I2S_SD1 DGND1 13 DVDD1 SP1 C27 C13 R140 1µF AUXDATA2 C17 NC9 29 Vbus OUT 5 M3 FILTR 35 M4 C6 NC SH2 7 E5V M2 GND 2 100nF R3 IN 1 AUXBCLK 18 9 NC4 12 C5 32 AGND5 33 DVDD USBLC6 2SC6U3 AGND1 3k32 NC ADC1LP 40 C23 R120 I2S_SD2 AVDD1 C20 39nF...

Page 15: ...COMM M1 1µF R26 2K IN3 IN3 10 COMM COMM R25 10K U7 1µF 3 GND1 M3 M3 1µF 1µF IN3 M3OUT GND2 6 GND4 GND3 M2OB OUT 2 M2 2 GND1 56K VCC HEADER 3X2 R35 56K AVDD 1 56K M2H M1 HEADER 3X2 4 4 GND2 3 M4OUT VCC 6 IN2 SB25 5 IN2 SB26 MP23ABS1 R33 10K SB24 4 HEADER 3X2 R38 10K R23 8 OUT3 C41 OUT1 2 IN1 R22 6 GND4 M1H M3OUT GND3 U6 C39 100nF M3 IN2 4 3 IN1 GND1 3 GND1 4 GND3 COMM R30 56K M1OB AVDD COMM M1OB CO...

Page 16: ...REF INTREF_BUFF C33 MP23ABS1 GND2 6 GND4 C36 5 GND3 TSV912 R19 100k C35 1 GND1 OUT 2 R16 56K MINTOUT INTREF A2V5 IN1 5 A2V5 1 OUT1 2 4 1M M5 6 IN2 7 OUT2 HP Filter fc 2 8Hz LP Filter fc 99 4 KHz R184 7k SB9 NC M3OB M5H INTREF_BUFF A2V5 R17 160 M5 M3OB 5 VDD HEADER 3X2 GND3 100nF U5 INTREF_BUFF 3 GND1 SB10 0R 2 1µF UM2649 Rev 2 page 16 18 UM2649 Schematic diagrams ...

Page 17: ...ble 5 Document revision history Date Version Changes 09 Dec 2019 1 Initial release 20 Mar 2020 2 Updated Section 1 Overview and Table 2 X NUCLEO AMICAM1 expansion board ST morpho connectors UM2649 UM2649 Rev 2 page 17 18 ...

Page 18: ...cts and ST assumes no liability for application assistance or the design of Purchasers products No license express or implied to any intellectual property right is granted by ST herein Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product ST and the ST logo are trademarks of ST For additional information about S...