STEVAL-MKI138V3 STMicroelectronics

STEVAL-MKI138V3 STAudioHub USB interface board based on MP45DT02 and STM32 Data brief Description The purpose of the STEVAL-MKI138V3 STAudioHub evaluation board is to demonstrate the decoding and streaming performance of digital MEMS microphone outputs. The STEVAL-MKI138V3 hosts the MP45DT02 top-port digital microphone, which works as a sensor, and the STM32F107RC microcontroller, working as an audio decoder. These microphones are analog-to-digital transducers. They are able to sense sound pressure and convert this signal into a digital signal using the PDM technique. Features The STM32 microcontroller decodes the PDM signal coming from the microphones and streams Sound card automatically recognized by a PC the audio via the USB. as an audio device. The STEVAL-MKI138V3 evaluation board is a MEMS microphones provide a high frequency sound card which is automatically recognized by data stream (1 to 3.25 MHz) of 1-bit digital a PC as an audio device. Connection is made samples (PDM technique) through a USB cable, which also supplies the Audio signals collected from the microphones board, and then streams the audio collected from are sent to the PC by USB (powered and the microphones to the PC. connected to PC through USB) It is also possible to use the board as an interface LED status indicator for other microphone PCBs (STEVAL-MKI126Vx). RoHS compliant In this case is recommended the use of the APWorkbench software tool. June 2014 DocID026565 Rev 1 1/4 For further information contact your local STMicroelectronics sales office. www.st.comSchematic diagram STEVAL-MKI138V3 1 Schematic diagram Figure 1. STEVAL-MKI138V3 circuit schematic 2/4 DocID026565 Rev 1 REVISION RECORD <Power Supply> <JTAG> UC VDD VCC USB UC VDD LTR ECO NO: APPROVED: DATE: UC VDD 1 1 R23 VCC USB 10k 3.3V R25 1 L3 47k 2 C L6 R27 INDUCTOR2 12 UC VDD Q1 2 B 0R0 NC 12 BEAD L1 2 1 1 1 BEAD 12 C 1 A VDD E BEAD R2 R3 R4 R24 Q2 UC VDD USB DISC 1 2 B R22 R26 10K 10K 10K R38 36k 1 2 L4 1K 1k 12 5X2 HEADER MIC VDD 2 2 2 D1 + JTMS E 2 180 C41 C40 C39 U4 2 1 BEAD LED-1 10nF 100nF LD1117 1 D5 33uF + 4 3 C49 JTCK VCC USB LED-1 100nF C3 STM32 I2S BICK R8 6 5 10uF 1.5K STM32 I2S LRCK 8 7 2 J7 NRST 10 9 VBUS 1 U8 2 1 R6 22 2 2 1 I/O1 I/O1 6 1 1 D- JP3 J2 USBDM JP 3 D+ 2 GND VBUS 5 R15 4 JRST ID R1222 10K 5 3 I/O2 I/O2 4 2 1 GND USBDP 2 Mini TypeB USBLC6-2 C5 100nF <uController STM32> <Mangusta option> <Clock Generators> MIC VDD <Microphones> U7 2 1 MIC VDD VSS CAP 3 2 UC VDD VDD L/R UC VDD R39 C24 4 1 10uF C23 0R0 NC DATA CLK MIC VDD C2 100nF MIC DATA12 C28 C29 U2 18pF 2.2uF 2.2uF MP34DB01 UC OSC IN 1 1 6 GND VDD R13 R37 UC VDDUC VDD 0R U10 10k MIC1LR UC OSC OUT MIC1LR MIC1CK 2 LR DOUT 5 1 1 1 3 2 MIC DATA12 2 Y1 C31 CLK L/R 12.288MHz R42 UC VDD U3 18pF MIC1CK R30 R31 R32 12 0R NS 100 100 100 2 1 3 4 STM32 I2S DATA34 GND CLK 34 4 1 R35 R34 C27 DATA VDD 2 2 2 100nF R28 1k 1k XT ACTIVE MIC DATA12 MIC VDD MIC CK STM32 I2S BICK C26 100 12.288 CK 1 MP45DT01 15pF D2 D3 D4 MP34DT01 C25 STM32 I2S LRCK LED-1 LED-1 LED-1 R33 C17 C18 15pF 10K 100nF 4.7uF SDA 2 SCL MIC VDD JRST UC VDD <Connectors> MCO UC VDD JTCK C22 3.3V 10uF C21 I2S DAT 12 12 MIC VDD 100nF I2S DAT 34 U1 I2S DAT 56 34 C15 C16 I2S LRCK 100nF 4.7uF 1 6 I2S BICK 56 GND VDD C1 1 48 R19 100 R1 UC VDD VBAT VDD 2 R18 SDA 100nF 2 2 0R NS 0R 1 78 1 2 47 SCL PC13-TAMPER-RTC VSS 2 R20100 2 5 910 LR DOUT 3 46 JTMS MUTE FAIL MIC DATA12 PC14-OSC32 IN PA13 VSS CAP 1 MIC2LR R41 11 12 MIC2CK 4 45 USBDP PC15-OSC32 OUT PA12 RESET 0R 2 R5 3 4 1 13 14 GND CLK 10K 5 44 USBDM UC OSC IN PD0 OSC IN PA11 STBY MCLK R29 15 16 2 6 43 USB DISC C20 C19 MIC CK UC OSC OUT 100 PD1 OSC OUT PA10 MP45DT01 15pF 15pF NRST 7 42 C8 NRST PA9 C6 C7 J15 10pF 8 41 NS 10pF RESET MCO PC0 PA8 C4 U5 100nF STBY 9 40 PC1 PC9 TP2 A VDD MUTE 10 39 PC2 PC8 TP3 FAIL 11 38 STM32 I2S MCLK PC3 PC7 MCO U11 12 37 STM32 I2S MCLK VSSA PC6 STM32 I2S MCLK MIC2CK 3 2 12 13 36 MIC2LR VDDA PB15 STM32 I2S DATA12 U9 CLK L/R 12.288 CK L2 3 2 14 35 MIC VDD VDD L/R LED1 PA0-WKUP PB14 820nH 4 1 4 1 15 34 DATA CLK MIC CK STM32 I2S BICK DATA VDD MIC VDD PA1 PB13 C10 C9 16 33 J8 J10 10uF 100nF LED2 STM32 I2S LRCK PA2 PB12 CON4 CON4 MP34DT01 MIC VDD MIC VDD MP34DB01 MIC DATA12 12 2 1 L5 MIC CK MIC CK BEAD R14 LED3 0R0 MIC DATA12 MIC DATA12 STM32 LQFP64 UC VDD UC VDD J6 J9 12.288 CK CON4 CON4 R16 0R NS MIC DATA12 0R0 R9 C14 C13 2 1 C11 C12 4.7uF 100nF VSS CAP I2S DAT 12 STM32 I2S DATA12 100nF 4.7uF TP1 0R0 R7 SPI1 Clock 2 1 2 1 I2S DAT 34 STM32 I2S DATA34 0R0R11 R36 2 1 0R0 I2S BICK STM32 I2S BICK 0R0R10 2 1 I2S LRCK STM32 I2S LRCK 12 LED1 12 LED2 12 BUT1 TACT2 1 2 LED3 17 64 PA3 VDD 3 18 63 VSS 4 VSS 3 19 62 VDD 4 PB9 20 61 PA4 PB8 21 60 PA5 BOOT0 22 59 PA6 PB7 23 58 PA7 PB6 24 57 PC4 PB5 25 56 PC5 PB4 26 55 PB0 PB3 27 54 PB1 PD2 28 53 PB2 PC12 29 52 PB10 PC11 30 51 PB11 PC10 12 31 50 VSS 1 PA15 32 49 VDD 1 PA14 12 R40 2 4 1 Vout 0R SN1 R21 2 2 3 1 Vin 0R SN R17 2 2 1 1 1 Vout 0R 1 2 2 GND 3 3 4 4 1 2 1 1 2 2 3 3 4 4 5 5 GND GND 5 GND 5 GND