IA8201-RDI-01

IA8201 EVM Kit Hardware User Guide This document details the architecture and design of the IA8201-LT development kit, as well as the hardware implementation of the Knowles IA8201-RDI-01. The extension kit is the IA8201 Reference Design for IoT designed to work with the Raspberry Pi. 1 knowles.com | Rev 1.1 ©2021; Knowles Electronics, LLC, Itasca, IL, USA, All Rights Reserved. SiSonic, Knowles and the trademarks of Knowles Electronics, LLC IA8201 EVM Kit Hardware User Guide Table of Contents Chapter 1: Hardware Setup ............................................................................................................................................... 3 1.1 Overview.......................................................................................................................... 3 1.2 Setup................................................................................................................................ 3 1.3 Hardware Components ..................................................................................................... 3 1.3.1 IA8201-LT DSP Board Components ......................................................................... 4 1.3.2 IA8201-LT-Pi Adapter Board Components ............................................................... 4 1.3.3 IA8201-LT 3 Microphone Array Board Components ................................................. 4 1.3.4 IA8201-LT 2 Microphone Array Board Components ................................................. 5 Chapter 2: IA8201-RDI-01 Kit Hardware ..................................................................................................................... 6 2.1 IA8201 Hardware Connection........................................................................................... 6 2.1.1 IA8201 Raspberry Pi Adapter Board ......................................................................... 6 2.1.2 IA8201 LT DSP Board ............................................................................................. 7 2.1.3 IA8201 LT 3 Microphone Array Board (Triangle) ..................................................... 8 2.1.4 IA8201 LT 2 Microphone Array Board (Linear) ........................................................ 8 Chapter 3: Schematics ......................................................................................................................................................... 9 3.1 Bill of Materials .............................................................................................................. 12 2 knowles.com | Rev 1.1 ©2021; Knowles Electronics, LLC, Itasca, IL, USA, All Rights Reserved. SiSonic, Knowles and the trademarks of Knowles Electronics, LLC IA8201 EVM Kit Hardware User Guide Chapter 1: Hardware Setup 1.1 Overview The Knowles IA8201-RDI-01 Reference Design for IoT is IA8201CQ1 DSP-based, which is a dual core Digital Signal Processor (DSP) for audio processing designed to implement with a readily available Raspberry Pi board to achieve low power and compact design. The IA8201 supports wake-on-voice processing for low latency voice UI, noise reduction, context awareness, and accelerated machine learning inferencing for sensor inputs edge processing. Figure 1 1.2 Setup The IA8201-LT, when connected to a Raspberry Pi, is constantly listening for wake words and commands. Upon detection of correct keyword, to signal a wake word detection, the IA8201 sends an interrupt using the IRQ signal connected to a GPIO on the Raspberry Pi (GPIO-06). The Raspberry Pi will then begin recording audio and initiates appropriate actions. Figure 2: IA8201-LT Connected to a Raspberry Pi Development Board with a 3-microphone array board. 1.3 Hardware Components This section details the hardware components of the following boards: 1. IA8201-LT DSP Board Components 2. IA8201-LT-Pi Adapter Board Components 3. IA8201-LT 3 Microphone Array Board Components 4. IA8201-LT 2 Microphone Array Board Components 3 knowles.com | Rev 1.1 ©2021; Knowles Electronics, LLC, Itasca, IL, USA, All Rights Reserved. SiSonic, Knowles and the trademarks of Knowles Electronics, LLC IA8201 EVM Kit Hardware User Guide 1.3.1 IA8201-LT DSP Board Components LDOs Reset Button 8Mb SPI Flash IA8201CQ1 22 Pin Flex Connector 10 Pin Flex Connector USB 3.5mm Audio Jack TLV320DAC3203 DAC Figure 3: IA8201-LT DSP Board 1.3.2 IA8201-LT-Pi Adapter Board Components 3 Pushbuttons 22 Pin Flex Connector Pi UART (optional) Figure 4: IA8201 Raspberry Pi Adapter Board connected to the Pi 1.3.3 IA8201-LT 3 Microphone Array Board Components Microphones 10 Pin Flex Connector Figure 5: IA8201 3 Microphone Array Board 4  Three Knowles SPH0690LM4H-1 Everest Microphones in a triangle pattern spaced 25mm apart.  10 Pin DSP Flex connector knowles.com | Rev 1.1 ©2021; Knowles Electronics, LLC, Itasca, IL, USA, All Rights Reserved. SiSonic, Knowles and the trademarks of Knowles Electronics, LLC IA8201 EVM Kit Hardware User Guide 1.3.4 IA8201-LT 2 Microphone Array Board Components Microphones 10 Pin Flex Connector Figure 6: IA8201 2 Microphone Array Board 5  2 Knowles SPH0690LM4H-1 Everest Microphones spaced 60mm apart  10-pin DSP Flex connector knowles.com | Rev 1.1 ©2021; Knowles Electronics, LLC, Itasca, IL, USA, All Rights Reserved. SiSonic, Knowles and the trademarks of Knowles Electronics, LLC IA8201 EVM Kit Hardware User Guide Chapter 2: IA8201-RDI-01 Kit Hardware The IA8201-LT development boards are part of the Knowles IA8201 Reference Design for IoT platform. These boards connect the IA8201 series of DSPs to low-cost microprocessors for IoT integration. Figure 7: Basic Hardware Architecture for IA8201 Reference Design Kit for IoT using a Raspberry Pi 2.1 IA8201 Hardware Connection Connect IA8201-LT DSP board through the 40-pin expansion connector on the Raspberry Pi. The necessary signals are fed to the IA8201LT Processor board through a 22-pin Flex cable. These signals include an SPI connection, an I2S connection, an I2C connection, 3.3V power, Ground, and various GPIOs. Connect the microphone array board on the opposite side of the DSP board, through a 10-pin flex connector that supplies the array boards with a microphone clock, power, and ground. The data from the microphones is routed from the array board to the DSP board through pre-configured lines. 2.1.1 IA8201 Raspberry Pi Adapter Board 3 Pushbuttons 22 Pin Flex Connector Pi UART (optional) Figure 8: IA8201 Raspberry Pi Adapter Board connected to the Pi. 6 knowles.com | Rev 1.1 ©2021; Knowles Electronics, LLC, Itasca, IL, USA, All Rights Reserved. SiSonic, Knowles and the trademarks of Knowles Electronics, LLC IA8201 EVM Kit Hardware User Guide Use the Raspberry Pi’s SPI port is to program and control the IA8201. The Raspberry Pi’s I2S is connected to both the IA8201 and the TI DAC for Audio output and input to the Pi. The I2C interface on the Raspberry Pi is only used to configure the TI DAC on the IA8201 Processor board. For more information on specific programming and control details, see IA8201 EVM Kit Software User Guide. Three GPIOs are connected between the Pi and the IA8201-LT Processor board to allow the Pi (CH-RST) to reset the IA8201, receive an IRQ (CH-IRQ) from the IA8201, and wake (WAKE) the processor from various sleep modes. The Pi adapter board has three pushbuttons connected to GPIO26, GPIO23, and GPIO22. These buttons are intended to be used by the host application and do not directly connect to the IA8201LT DSP Board. 2.1.2 IA8201 LT DSP Board LDOs 22 Pin Flex Connector Reset Button 8Mb SPI Flash IA8201CQ1 10 Pin Flex Connector USB TLV320DAC3203 DAC 3.5mm Audio Jack Figure 9: IA8201-LT DSP Board The IA8201 CQ requires a 1.8V reference voltage to generate the correct processor voltage for both DSPs, hence the IA8201LT DSP board includes a 1.8V LDO (LDO1) to generate this voltage for the IA8201’s internal LDO. The IA8201 LT DSP board includes a 19.2MHz oscillator to provide a time base and boot clock to the IA8201 CQ. The user can remove this time base, but the latch on reset pin to boot from the IA8201CQ from its internal oscillator must be modified using the CLK-BOOT-LOR jumper. To boot from an internal oscillator, the jumper must be moved from the default 3-2 position to the 1-2 positon. The IA8201 LT DSP board also includes two LEDs. The green LED indicates that the board is powered by 3.3V. The Red LED is connected to the IRQ pin through a FET to indicate when the IA8201 CQs interrupt pin becomes active. The IRQ pin is active at power up and remains so until the IA8201 CQ is programmed and operational. In a host-less mode, the IA8201 LT DSP board and other components requires 3.3V to operate. A 3.3V LDO (LDO2) was used to power the board from the USB, independent of the Host 3.3V supply. When using the external USB power, Jumper VDDIO-SELECT must be moved to the USB position. When configuring the IA8201 CQ to boot from flash, the latch on reset pin (GPIO1) must be configured using the FLASH-BOOT-LOR selector jumper. When booting from flash, move the jumper o position 2-3. 7 knowles.com | Rev 1.1 ©2021; Knowles Electronics, LLC, Itasca, IL, USA, All Rights Reserved. SiSonic, Knowles and the trademarks of Knowles Electronics, LLC IA8201 EVM Kit Hardware User Guide 2.1.3 IA8201 LT 3 Microphone Array Board (Triangle) Microphones 10 Pin Flex Connector Figure 10: IA8201 3 Microphone Array Board The IA8210 LT 3 microphone array board includes three Knowles SPH0690 Everest microphones. Microphones 1 and 2 share a data line (D1), whereas Microphone 3has its own data line (D2). The microphone array board includes a clock cleanup circuit that allows longer distance flex cables to be connected between the DSP board and the microphone array. The maximum recommended length of this cable is 20cm. 2.1.4 IA8201 LT 2 Microphone Array Board (Linear) Figure 11: IA8201 2 Microphone Array Board The IA8201 LT 2 microphone array board includes two Knowles SPH0690 Everest microphones, which share a data line (D1). This array, like the IA8201 LT3 microphone array board has a clock cleanup circuit that allows the microphones to be placed up to 20cm away from the DSP board. 8 knowles.com | Rev 1.1 ©2021; Knowles Electronics, LLC, Itasca, IL, USA, All Rights Reserved. SiSonic, Knowles and the trademarks of Knowles Electronics, LLC IA8201 EVM Kit Hardware User Guide Chapter 3: Schematics Figure 12: Schematic of the Knowles IA8201-LT DSP Board 9 knowles.com | Rev 1.1 ©2021; Knowles Electronics, LLC, Itasca, IL, USA, All Rights Reserved. SiSonic, Knowles and the trademarks of Knowles Electronics, LLC IA8201 EVM Kit Hardware User Guide Figure 13: Schematic of the Knowles IA8201-LT Pi Adapter Board 10 knowles.com | Rev 1.1 ©2021; Knowles Electronics, LLC, Itasca, IL, USA, All Rights Reserved. SiSonic, Knowles and the trademarks of Knowles Electronics, LLC IA8201 EVM Kit Hardware User Guide Figure 14: Schematic of the Knowles IA8201-LT Mic Array Boards 11 knowles.com | Rev 1.1 ©2021; Knowles Electronics, LLC, Itasca, IL, USA, All Rights Reserved. SiSonic, Knowles and the trademarks of Knowles Electronics, LLC IA8201 EVM Kit Hardware User Guide 3.1 Bill of Materials Ref Designator 12 Manufacturer HOSTFLEX, HOST-KONA-LT AMPHENOL FCI (VA) Manufacturer Part Number SFV22R-1STE1HLF MIC-ARRAY, MICARRAY1, MICARRAY2 VDDIO-SELECT, SDA-SEL, SCL-SEL, CODEC-IN-SEL, FLASH-BOOT-LOR, CLKBOOT-LOR SV1 AMPHENOL FCI (VA) SFV10R-3STE1HLF USB ADAM TECH (VA) STEREO-OUT CUI DEVICES (VA) Placed in default locations FL1 Sullins Connector Solutions Molex FL2 Molex SW1, SW2, SW3, RESET E-SWITCH (VA) TL3305AF160QG R17,R18,R19,R20,R24 Yageo RC0603JR-070RL RM1,RM2,RM3,RM5,RM6 Yageo RC0603JR-0751RL R13,R14 Yageo RC0603JR-07300RL RM8,RM9,RM10,RM13,R M14 R9, Yageo RC0603JR-07100RL Yageo RC0603JR-071KL R1,R2,R3,R4,R5,R6,R7,R8,R 10,R11,R15,R16,R22,R23, R12 Yageo RC0603JR-0710KL Yageo RC0603JR-071ML C1,C2,C9,C12,C13,C16,C17 ,C18,C19,C20,C21,C22,C23 ,C25,C27,C30,C31,C32,C33 ,C34,C36,C37,C38 Samsung ElectroMechanics HARWIN INC M20-9990346 HARWIN INC M20-7832046 MCR-B-S-RA-TSMT-NPCS2-T/R SJ-3524-SMT-TR QPC02SXGN-RC 0150200233 0152660105 CL10F104ZB8NNNC Description CONN FFC BOTTOM 22POS 0.50MM R/A CONN FPC BOTTOM 10POS 0.50MM R/A CONN HEADER VERT 3POS 2.54MM CONN RCPT 40POS 0.1 TIN PCB MICRO USB, TYPE B, RIGHT ANGLE, CONN JACK STEREO 3.5MM SMD R/A CONN JUMPER SHORTING .100" GOLD FFC, FPC Cable 0.020" (0.50mm) 4.000" (101.60mm) CABLE FFC 10POS 0.50MM 6" SWITCH TACTILE SPST-NO 50MA 12V RES SMD 0 OHM JUMPER 1/10W 0603 RES SMD 51 OHM 5% 1/10W 0603 RES SMD 220 OHM 5% 1/10W 0603 RES SMD 100 OHM 5% 1/10W 0603 RES SMD 1K OHM 5% 1/10W 0603 RES SMD 10K OHM 5% 1/10W 0603 RES SMD 1M OHM 5% 1/10W 0603 CAP CER 0.1UF 50V Y5V 0603 knowles.com | Rev 1.1 ©2021; Knowles Electronics, LLC, Itasca, IL, USA, All Rights Reserved. SiSonic, Knowles and the trademarks of Knowles Electronics, LLC IA8201 EVM Kit Hardware User Guide Ref Designator C3,C5,C6,C14,C15,C24,C26 ,C35 C11 Manufacturer Part Number CL10B105KA8NFNC C28, C29 Samsung ElectroMechanics Samsung ElectroMechanics Samsung ElectroMechanics Samsung ElectroMechanics Taiyo Yuden LDO2 TEXAS INSTRUMENTS TLV70233PDBVT LDO1 TEXAS INSTRUMENTS TLV70218PDBVT Q1 RUM002N05T2L D1 ROHM SEMICONDUCTOR (VA) Infineon Technologies U5,U6 ON Semiconductor REFOSC TAITIEN USA IRQ Würth Elektronik 150080SS75000 POWER Würth Elektronik 150080GS75000 U4 Macronix MX25V8035FZUI U2 DNP U3 Texas Instruments U1 Knowles Corporation M1,M2,M3,ML1,ML2 Knowles Corporation C10 C4,C7,C8 13 Manufacturer CL10A225KP8NNNC CL10A475MQ8NNNC CL10A106KQ8NNWC JMK212BBJ476MG-T BAT5405E6327HTSA1 Description CAP CER 1UF 25V X7R 0603 CAP CER 2.2UF 10V X5R 0603 CAP CER 4.7UF 6.3V X5R 0603 CAP CER 10UF 6.3V X5R 0603 CAP CER 47UF 6.3V X5R 0805 IC REG LINEAR 3.3V 300MA SOT23-5 IC REG LINEAR 1.8V 300MA SOT23-5 MOSFET N-CH 50V 200MA VMT3 DIODE ARRAY SCHOTTKY 30V SOT23 NC7WZ17P6X OXKTGLJANF-19.200000 TLV320DAC3203IRGET IA8201CQ-1 SPH0690LMH4H-1-1 XTAL OSC XO 19.2000MHZ CMOS SMD Red 630nm LED Indication - Discrete 1.9V 0805 (2012 Metric) Green 520nm LED Indication - Discrete 3.2V 0805 (2012 Metric) IC FLASH 8MBIT SPI 104MHZ 8USON IC AMP CLASS AB STEREO 24VQFN IA8201 DSP QFN Knowles Everest Microphone knowles.com | Rev 1.1 ©2021; Knowles Electronics, LLC, Itasca, IL, USA, All Rights Reserved. SiSonic, Knowles and the trademarks of Knowles Electronics, LLC IA8201 EVM Kit Hardware User Guide Revision History Version 1.0 1.1 Comments Initial Release Updated part number Knowles Corporation 1151 Maplewood Drive Itasca, Illinois 60143 Date 7/16/2021 3/08/2021 Phone: (630) 250-5100 Fax: (630) 250-0575 info@knowles.com Model/Reference Number: Rev 1.1 © 2021 Knowles