Renesas RA6M3 Application Note

Application Note

R12AN0106EJ0100 Rev.1.00 Page 1 of 25 Apr.30.2020

RA6M3 Group

RA6M3 HMI Expansion Board

Introduction

This application note explains the hardware specifications of RTK0EG001BB00001BJ, which is an

expansion board of RA6M3 MCU Group evaluation kit, EK-RA6M3G.

Target Device

RA6M3 Group

Related Document

1. EK-RA6M3G v1 – User's Manual (R20UT4629EU0101)

RA6M3 Group RA6M3 HMI Expansion Board

R12AN0106EJ0100 Rev.1.00 Page 2 of 25 Apr.30.2020

Contents

1. Outline .................................................................................................................................... 3

2. Product External Appearance .................................................................................................. 4

3. Hardware Specifications .......................................................................................................... 5

4. Block Diagram ......................................................................................................................... 6

5. Settings and Connection to the board ...................................................................................... 7

5.1 Connects EK-RA6M3 board .................................................................................................................... 7

5.2 Microphone .............................................................................................................................................. 8

5.2.1 Inside microphone ................................................................................................................................. 8

5.2.2 External Expansion microphone ............................................................................................................ 9

5.2.2.1 External Analog MEMS microphone ................................................................................................. 10

5.2.2.2 External electret condenser microphone........................................................................................... 11

5.3 Speaker ................................................................................................................................................. 12

5.4 Sensor expansion connector(optional) .................................................................................................. 12

5.5 Serial expansion connector(optional) .................................................................................................... 12

6. Circuit diagram ...................................................................................................................... 13

7. Board Layout Diagram ........................................................................................................... 16

8. BOM (parts list) ...................................................................................................................... 23

Revision History ............................................................................................................................ 25

RA6M3 Group RA6M3 HMI Expansion Board

R12AN0106EJ0100 Rev.1.00 Page 3 of 25 Apr.30.2020

1. Outline

This product provides below features and system configuration.

(1) Voice Recognition by analog output MEMS microphone circuit

Direction forming technology (Beamforming) for voice

(2) Sound playback by D-Amp Driver® circuit(*) (3) Built-in Temperature and Humidity sensor (4) Built-in Gas sensor for indoor environment gas detection

• Measurement of Total Volatile Organic Compounds(TVOC)

• Measurement of equivalent CO2(eCO2)

• Measurement of Indoor Air Quality(IAQ)

• Measurement of Odor

(5) Built-in 64Mbit Serial Flash (6) Expansion connectors (optional)

• External Analog microphone connection

• External I2C Interface device connection

• External UART Interface device connection

(*) D-Amp Driver® is a registered trademark of CRI Middleware Co., Ltd.

RA6M3 HDMI 　

expansion board

J-Link OB USB

Temperature

measurement

Humidity

measurement

Gas measurement

voice

recognition

Audio

playback

USB

EK-RA6M3G board

Figure 1 System configuration

RA6M3 Group RA6M3 HMI Expansion Board

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2. Product External Appearance

Speaker connector

Microphone 1 (back side)

Microphone 2 (back side)

External microphone 1 (optional)

External microphone 2 (optional)

Serial expansion connector (optional)

Sensor expansion I2C Interface connector (optional)

Temperature and humidity sensor Renesas (IDT)

Gas sensor Renesas (IDT)

Arduino Uno connector (Analog & Power)

Arduino Uno connector (Digital)

External microphone jumper

External microphone gain setting resistor

Internal / external microphone selection jumper

Power LED

Speaker

Microphone amplifier Renesas

Figure 2 Product External Appearance

RA6M3 Group RA6M3 HMI Expansion Board

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3. Hardware Specifications

Table 1 Hardware Specifications

Item

Description

Remarks

Board size

78.0×80.0[mm]

max external dimension

Power

EK-RA6M3G board J18

3.3V、5V

Serial Flash

MACRONIX International Co., Ltd.

MX25R6435FM2IL0

SPI I/F、64Mbit LED

For Power： yellow LED 1pc

Microphone

KNOWLES Corp SPU0410LR5H-QB 2pcs

MEMS microphone, Omnidirectional, Sensitivity: -38dBV/Pa, Analog Output Amp circuit gain 40dB(x100)

External expansion microphone (Optional)

MEMS type (Analog output) Or Electret condenser type

Omnidirectional, Amp circuit default gain 40dB(x100)

Speaker operation circuit

D-Amp Driver® support H bridge circuit

Speaker

CUI Devices CMS-28588N-L152

dimensionsΦ28mm maximum input power 2W Impedance 8Ω Sound Presser Level 88dB SPL(2W、

0.5m)

Humidity and Temperature Sensor

RENESAS(IDT) HS3001

I2C IF, 14bit resolution, Sensor Accuracy

• Temperature ±0.2℃ typ (-10 to +80℃)

• RH ±1.5%RH typ (10 to 90%RH, 25℃)

Gas Sensor

RENESAS(IDT) ZMOD4410AI1V

I2C IF, 10～16bit resolution, Measurement value

• TVOC measurement

• eCO2 measurement

• IAQ measurement

• Odor measurement

Measurement Accuracy

• TVOC±15% typ (after calibration)

• eCO2±25%typ (compared to

NDIR)

I2C Expansion Interface (Optional)

5V I/F Connector 1pc

3.3V I/F Connector 1pc

UART Expansion Interface (Optional)

3.3V I/F Connector 1pc

RA6M3 Group RA6M3 HMI Expansion Board

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4. Block Diagram

Power supply

LED

H bridge

3.3V

Speaker

D-Amp driver® external circuit

MIC0

MIC1

MEMS MIC

MIC amplifier

External MIC

(optional)

EX_MIC0

64Mbit

Serial

Flash

3.3V

SPI

Relative Humidity/

Temperature sensor

3.3V

40dB(x100)※

40dB(x100)

Gas

sensor

3.3V

Voltage level

translator

3.3V

I2C

I2C(5V)

EK- RA6M3G board

AN0

AN1

3.3V

PWM

Sensor expansion connector (5V) (optional)

Sensor expansion connector (3.3V) (optional)

UART expansion connector (optional)

UART

Arduino Uno Connectors

Jumper

※User configurable

EX_MIC1

Figure 3 Block Diagram

RA6M3 Group RA6M3 HMI Expansion Board

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5. Settings and Connection to the board

5.1 Connects EK-RA6M3 board

As figure 4 shows below, connect RA6M3 HMI expansion board with Arduino Uno connector of EK-

RA6M3G board.

Figure 4 EK-RA6M3G board Connection

RA6M3 Group RA6M3 HMI Expansion Board

R12AN0106EJ0100 Rev.1.00 Page 8 of 25 Apr.30.2020

5.2 Microphone

5.2.1 Inside microphone

Table 2 and Figure 5 shows jumper settings. Figure 3 shows direction of microphone when uses

beamforming.

Table 2 Jumper Setting(Inside microphone)

Reference

Setting

J49

Short 1-2pin

J50

Short 1-2pin

MIC1 MIC2

Direction 1 Direction 2

Figure 5 Jumper setting of inside microphone

Table 3 Microphone direction of beamforming(Inside microphone)

Direction

MIC1

MIC2

Direction1

Direction2

RA6M3 Group RA6M3 HMI Expansion Board

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5.2.2 External Expansion microphone

External Expansion microphone can be connected to Analog MEMS microphone and Electret condenser

microphone.

Table 4 shows signal of external microphone connector and Table 5 shows Amp gain settings. Also ,chapter 5.2.2.1 explains Setting of analog MEMS microphone, 5.2.2.2 explains electret condenser

microphone settings.

Table 4 External expansion microphone interface

J9, J8

Signal name

Type

POW/ECMO

POWER/OUT

MEMSO

OUT

GND

POWER

Table 5 Amp Gain setting of External Expansion microphone

Reference

Gain

U1C

Gain = (Resistance Value J31-J32) / R7 Default：1M / 10K = 100 (40dB)

U1D

Gain = (Resistance Value J41-J42) / R8 Default：1M / 10K = 100 (40dB)

+ 18 hidden pages

Renesas RA6M3 Application Note

Specifications and Main Features

Frequently Asked Questions

User Manual

1. Outline

(1) Voice Recognition by analog output MEMS microphone circuit

2. Product External Appearance

3. Hardware Specifications

4. Block Diagram

5. Settings and Connection to the board

5.1 Connects EK-RA6M3 board

5.2 Microphone

5.2.1 Inside microphone

5.2.2 External Expansion microphone