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UM1900 

Revision

 history 

 

 

DocID027905 Rev 4 

19/20 

 

7 

Revision history 

Table 9: Document revision history 

Date 

Revision 

Changes 

28-May-2015 

1 

Initial release. 

28-Jan-2016 

2 

Minor text edits throughout document. 

Updated Section "Introduction". 

Updated Section 3.3: "Audio acquisition strategy". 

Updated Section 3.4: "Solder bridge configurations". 

14-Jul-2016 

3 

Added Section 4: "Nucleo 144 support". 

09-May-2017 

4 

Updated 

Section 2.3.2.2: "Jumper settings for I²S-plus-SPI-based 

systems"

. 

 

Содержание X-NUCLEO-CCA02M1

Страница 1: ...nd STMicroelectronics MP34DT01 M digital microphones It has two microphones soldered on board and it is compatible with digital microphone coupon boards such as STEVAL MKI129Vx and STEVAL MKI155Vx The...

Страница 2: ...ion 7 2 1 USB connector and power source 7 2 2 Audio acquisition strategy 8 2 2 1 DFSDM microphone acquisition 8 2 2 2 I S and SPI microphone acquisition 8 2 3 Solder bridge configurations 9 2 3 1 Sol...

Страница 3: ...3 Solder bridge configuration for 4 microphone acquisition 11 Table 4 Solder bridge configuration for 1 microphone acquisition 11 Table 5 Solder bridge configuration for 2 microphone acquisition 12 Ta...

Страница 4: ...CCA02M1 on STM32 Nucleo board 5 Figure 3 Connection with STEVAL MKI155V1 7 Figure 4 General acquisition strategy using I S and SPI 9 Figure 5 Board schematic Part 1 16 Figure 6 Board schematic Part 2...

Страница 5: ...ction between the STM32 Nucleo and the X NUCLEO CCA02M1 is designed for use with any STM32 Nucleo board When mounting the X NUCLEO CCA02M1 on the STM32 Nucleo ensure that all the pins are aligned with...

Страница 6: ...ation of the board firmware package order code X CUBE MEMSMIC1 a utility running on the user s PC will complete the demo The user PC must have the following characteristics at least 128 MB of RAM 40 M...

Страница 7: ...als for the synchronized acquisition of up to 4 microphones The board also provides USB streaming using the STM32 Nucleo microcontroller USB peripheral for this purpose a USB connector is available as...

Страница 8: ...eral for the third and the fourth 2 2 1 DFSDM microphone acquisition The DFSDM peripheral generates the precise clock needed by the microphones and reads the data on the rising and falling edges of ea...

Страница 9: ...ith appropriate solder bridges Clock routing can also be changed according to specific needs 2 3 1 Solder bridge roles The table below lists the solder bridge functions with respect to audio acquisiti...

Страница 10: ...s Custom setups are also possible for ad hoc functionalities SB1 SB2 SB6 are reserved for the USB or Oscillator pins and are not part of the audio acquisition process These configurations depend on th...

Страница 11: ...4 microphone acquisition SB Status SB7 Open SB8 Open SB9 Open SB10 Open SB11 Open SB12 Close SB13 Open SB14 Open SB15 Open SB16 Close SB17 Close SB18 Open SB19 Open SB20 Open SB21 Open In addition J2...

Страница 12: ...d by the microphones In this scenario the clock is then halved by the timer and routed to the microphones to give them the right clock I S therefore reads values from both edges of the merged PDM line...

Страница 13: ...ead values from both the edges of the merged PDM lines For this use case you need the following SB configuration Table 6 Solder bridge configuration for 4 microphone acquisition SB Status SB7 Close SB...

Страница 14: ...port In order to accept Nucleo 144 boards morpho header connectors must be soldered on the relevant footprint available on the Nucleo You only need a pair of 2 x 38 pin stripline connectors for the ex...

Страница 15: ...35 MIC_CLK_NUCLEO If SB12 is closed CN10 11 MIC_CLKx2 If SB8 is closed 12 OTG_FS_DP_NUCLEO If SB1 is closed 14 OTG_FS_DM_NUCLEO If SB2 is closed 15 MIC_PDM34 If SB10 is closed 25 MIC_PDM34 If SB17 is...

Страница 16: ...Board schematics UM1900 16 20 DocID027905 Rev 4 5 Board schematics Figure 5 Board schematic Part 1 Figure 6 Board schematic Part 2...

Страница 17: ...UM1900 Board schematics DocID027905 Rev 4 17 20 Figure 7 Board schematic Part 3 Figure 8 Board schematic Part 4...

Страница 18: ...Layout UM1900 18 20 DocID027905 Rev 4 6 Layout Figure 9 Top layout Figure 10 Bottom layout...

Страница 19: ...015 1 Initial release 28 Jan 2016 2 Minor text edits throughout document Updated Section Introduction Updated Section 3 3 Audio acquisition strategy Updated Section 3 4 Solder bridge configurations 14...

Страница 20: ...sers are solely responsible for the choice selection and use of ST products and ST assumes no liability for application assistance or the design of Purchasers products No license express or implied to...

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