Renesas RA4 Series Installation and operation manual

Rev.1.0 June 2022
Renesas Advanced (RA) Family
RA4 Series
User’ s Manual
www.renesas.com
All information contained in these materials, including products and product specifications, represents
information on the product at the time of publication and is subject to change by Renesas Electronics
Corp. without notice. Please review the latest information published by Renesas Electronics Corp.
through various means, including the Renesas Electronics Corp. website (http://www.renesas.com).
VOICE-RA4E1 Engineering Manual
Renesas VUI Reference Solution
Engineering Manual

VOICE-RA4E1 Engineering Manual
VOICE-RA4E1 Engineering Manual Rev.1.0 Page
1
of 14
June 2022
Renesas VUI Reference Solution
VOICE-RA4E1 Engineering Manual
Contents
1. Overview .................................................................................................................................3
2. Kit Contents.............................................................................................................................3
3. Kit Ordering Information...........................................................................................................3
4. Kit Peripheral Features............................................................................................................4
5. MCU Feature Support..............................................................................................................4
6. Kit Architecture........................................................................................................................6
6.1 System Block Diagram............................................................................................................................6
6.2 Jumper Settings ......................................................................................................................................7
6.2.1 Traditional Pin Header Jumpers............................................................................................................7
6.2.2 Copper Jumpers....................................................................................................................................7
7. MCU Port Mapping..................................................................................................................8
8. Implementation Details............................................................................................................9
8.1 QSPI NOR flash ......................................................................................................................................9
8.2 PMOD......................................................................................................................................................9
8.3 Microphones..........................................................................................................................................10
8.4 Audio out ...............................................................................................................................................10
8.5 LEDs......................................................................................................................................................10
8.6 Buttons ..................................................................................................................................................11
8.7 Debug....................................................................................................................................................11
8.8 Power ....................................................................................................................................................13
8.9 USB .......................................................................................................................................................13
9. Certifications..........................................................................................................................14
Revision History............................................................................................................................14

Renesas VUI Reference Solution VOICE-RA4E1 Engineering Manual
VOICE-RA4E1 Engineering Manual Rev.1.0 Page
2
of 14
June 2022
Figures
Figure 1. VOICE-RA4E1 Kit Contents............................................................................................................... 3
Figure 2. System Block Diagram....................................................................................................................... 6
Figure 3. Copper Jumpers................................................................................................................................. 7
Figure 4. PMOD connector................................................................................................................................ 9
Figure 5. VOICE-RA4E1 Power Block Diagram.............................................................................................. 13
Tables
Table 1. Default Jumper Settings ..................................................................................................................... 7
Table 2. Default Copper Jumper Settings ........................................................................................................ 8
Table 3. MCU Port Assignments ...................................................................................................................... 8
Table 4. QSPI Flash Port Assignments............................................................................................................ 9
Table 5. PMOD Port Assignments (J15) ........................................................................................................... 9
Table 6. Analog MEMS Microphone left channel (M2) Port Assignments ...................................................... 10
Table 7. Analog MEMS Microphone right channel (M3) Port Assignments.................................................... 10
Table 8. Digital I2S MEMS Microphone left channel (M1) Port Assignments ................................................. 10
Table 10. Headphone Jack Pin Assignments.................................................................................................. 10
Table 11. User LED Port Assignments............................................................................................................ 10
Table 12. User Button Port Assignment (S1) .................................................................................................. 11
Table 13. Jumper Connection Summary for Different Debug ......................................................................... 11
Table 14. Debug USB Connector.................................................................................................................... 11
Table 15. 10-pin JTAG/SWD Connector (J8)................................................................................................ 12
Table 16. 20-pin JTAG/SWD Connector (J9)................................................................................................ 12
Table 17. Debug Port Signal Assignments...................................................................................................... 12
Table 18. USB Full Speed / USB Type-C Signal Assignments (J1)................................................................ 13

Renesas VUI Reference Solution VOICE-RA4E1 Engineering Manual
VOICE-RA4E1 Engineering Manual Rev.1.0 Page
3
of 14
June 2022
1. Overview
VOICE-RA4E1 is an edge voice recognition evaluation kit designed to be used by Ecosystem Partners,
Application Engineers, Field Application Engineers, and for Business Development opportunities. The
primary purpose is to evaluate the functionality of projects developed by Ecosystem Partners, and to
facilitate the development of additional partner projects. The kit design to use the RA4E1 MCU with QFN
48pin package as the core logic device, with QSPI flash, OPAMP and power devices chosen from the
Renesas product portfolio.
2. Kit Contents
The following components are included in the kit:
1. VOICE-RA4E1 board
2. Micro USB device cable (type-A male to micro-B male)
Figure 1. VOICE-RA4E1 Kit Contents
3. Kit Ordering Information
VOICE-RA4E1 kit orderable part number: TW001-VUIA4E1POCZ

Renesas VUI Reference Solution VOICE-RA4E1 Engineering Manual
VOICE-RA4E1 Engineering Manual Rev.1.0 Page
4
of 14
June 2022
4. Kit Peripheral Features
Following is a list of the specific features that have been implemented:
•QSPI: One QSPI flash memory device, Dialog AT25SF641B-MHB-T, 64M-bit (8MB).
•PMOD: 1 Digilent PMOD connectors, supporting UART, SPI and I2C configurations.
•Microphones: 1 I2S MEMS digital microphones and 2 MEMS analog microphones, distance between
each pair of microphones is 50mm which is suitable for beamforming applications.
•Audio out: One stereo audio headphone jack supporting mono output on both channels.
•LEDs: Five LEDs, D2 (Red), D3 (Green) and D4 (Blue) configurable by user, D5 (Blue) as a 3.3V power
indicator, D8(Green) as a JLOB (J-LINK on board) indicator.
•Buttons: One RESET button (S2), and one USER button (S1).
•Debug: J-Link On-Board debug interface, supporting JTAG or SWD debug port.
•USB: Micro USB-B (J6) for power input and J-Link On-Board function, USB-C (J1) for power input and
RA4E1 USB Full Speed port as a USB device.
•Form Factor: 7.5 x 6 cm
5. MCU Feature Support
The RA4E1 MCU supports a full array of peripheral functions. The published features of the MCU are listed
below. Features highlighted in BOLD text are directly supported by the kit hardware for voice applications.
•Arm Cortex-M33 Core with Floating Point Unit (FPU)
•Armv8-M architecture with DSP instruction set
•Maximum operating frequency: 100 MHz
•Support for 4-GB address space
•On-chip debugging system: JTAG, SWD
•Boundary scan and Arm Memory Protection Unit (Arm MPU)
•Memory
•Up to 512KB code flash memory
•8-KB data flash memory (100,000 program/erase cycles minimum)
•Up to 128KB SRAM
•1KB Standby SRAM
•Flash Cache (FCACHE)
•Memory Protection Units (MPU)
•Memory Mirror Function (MMF)
•128-bit unique ID
•Connectivity
•USB 2.0 Full-Speed (USBFS) module
•On-chip transceiver with voltage regulator
•Serial Communications Interface (SCI) with FIFO × 4
•Serial Peripheral Interface (SPI) × 1
•I2C bus interface (IIC) × 1
•Quad Serial Peripheral Interface (QSPI)
•Analog
•7 channel 12-bit A/D Converter (ADC12) with sample-and-hold circuits

Renesas VUI Reference Solution VOICE-RA4E1 Engineering Manual
VOICE-RA4E1 Engineering Manual Rev.1.0 Page
5
of 14
June 2022
•12-bit D/A Converter (DAC12) × 1
•Timers
•General PWM Timer 32-bit (GPT32) × 2
•General PWM Timer 16-bit (GPT16) × 2
•Asynchronous General-Purpose Timer (AGT) × 5
•Safety
•FACI command protection by FENTRYR register
•Flash memory is protected by FWEPROR register
•The user area is protected by the block protect setting
•Error is detected when unintended commands or prohibited settings occur. The FACI command is
not accepted after an error detection.
•The start-up area select function allows customer to safely update the boot firmware. The size of the
start-up area is 8 KB.
•System and Power Management
•Low power modes
•Battery backup function (VBATT)
•Realtime Clock (RTC) with calendar and VBATT support
•Event Link Controller (ELC)
•Data Transfer Controller (DTC)
•DMA Controller (DMAC) × 8
•Power-on reset
•Low Voltage Detection (LVD) with voltage settings
•Watchdog Timer (WDT)
•Independent Watchdog Timer (IWDT)
•Security and Encryption
•ARMv8-M TrustZone security
•Device lifecycle management
•Debug access level
•Key injection
•Secure pin multiplexing
•Secure Crypto Engine 9 (SCE9)
•Symmetric algorithms: AES
•Asymmetric algorithms: RSA, ECC, and DSA
•Hash-value generation: SHA224, SHA256, GHASH
•128-bit unique ID.
•Multiple Clock Sources
●Main clock oscillator (MOSC) (8 to 24 MHz)
●Sub-clock oscillator (SOSC) (32.768 kHz)
●High-speed on-chip oscillator (HOCO) (16/18/20 MHz)
●Middle-speed on-chip oscillator (MOCO) (8 MHz)
●Low-speed on-chip oscillator (LOCO) (32.768 kHz)
●IWDT-dedicated on-chip oscillator (15 kHz)

Renesas VUI Reference Solution VOICE-RA4E1 Engineering Manual
VOICE-RA4E1 Engineering Manual Rev.1.0 Page
6
of 14
June 2022
●Clock trim function for HOCO/MOCO/LOCO
•General-Purpose I/O Ports
•5V tolerance, open drain, input pull-up, switchable driving ability
•Operating Voltage
•VCC: 2.7 to 3.6 V
6. Kit Architecture
6.1 System Block Diagram
Figure 2. System Block Diagram

Renesas VUI Reference Solution VOICE-RA4E1 Engineering Manual
VOICE-RA4E1 Engineering Manual Rev.1.0 Page
7
of 14
June 2022
6.2 Jumper Settings
Two types of jumpers are provided on the VOICE-RA4E1 board.
1. Traditional pin header jumpers copper jumpers
2. Copper jumpers (trace-cut type and solder bridge type)
6.2.1 Traditional Pin Header Jumpers
These jumpers are traditional small pitch jumpers that require an external shunt to open/close them. The
traditional pin jumpers on the VOICE-RA4E1 board are 2.54mm pitch headers and require compatible
2.54mm shunt jumpers.
Default Jumper Configuration
The following table describes the default settings for each jumper on the VOICE-RA4E1 board. This includes
copper jumpers (Ex designation) and traditional pin jumpers (Jx designation.)
Functional details for many of the listed jumpers may be found in sections associated with each functional
area of the kits.
Table 1. Default Jumper Settings
Location
Default Open/Closed
Function
J2
Open
USB Boot mode : Close to configures the RA4E1 MCU enter USB
boot mode, code can be download through J1 USB TYPE-C
connector.
J3
Short
For MCU current measurement, remove this jumper wire and serial
with a current meter to measure MCU current.
J7
Open
Short with a jumper wire to set on board debug RA4M2 MCU(U8) in
RESET for disable on board debug.
J16
open
Short with jumper wire to route I2C SDA signal to J15 PMOD
connector pin 4.
6.2.2 Copper Jumpers
Copper jumpers are of two types, designated trace-cut and solder-bridge.
A trace-cut jumper is provided with a narrow copper trace connecting its pads. The silk screen overlay
printing around a trace-cut jumper is a solid box. To isolate the pads, cut the trace between pads adjacent to
each pad, then remove the connecting copper foil either mechanically or with the assistance of heat. Once
the etched copper trace is removed, the trace-cut jumper is turned into a solder-bridge jumper for any later
changes.
A solder-bridge jumper is provided with two isolated pads that may be joined together by one of three
methods:
⚫Solder may be applied to both pads to develop a bulge on each and the bulges joined by touching a
soldering iron across the two pads.
⚫A small wire may be placed across the two pads and soldered in place.
⚫A SMT resistor, size 0805, 0603, or 0402, may be placed across the two pads and soldered in place. A
zero-ohm resistor shorts the pads together.
For any copper jumper, the connection is considered closed if there is an electrical connection between the
pads (default for trace-cut jumpers.) The connection is considered open if there is no electrical connection
between the pads (default for the solder-bridge jumpers.)
Figure 3. Copper Jumpers

Renesas VUI Reference Solution VOICE-RA4E1 Engineering Manual
VOICE-RA4E1 Engineering Manual Rev.1.0 Page
8
of 14
June 2022
Table 2. Default Copper Jumper Settings
Location
Default Open/Closed
Function
E1
Closed
WS output to I2S digital microphone
E2
Closed
SSL input for SPI0
E3
Closed
SCK output to I2S digital microphone
E4
Closed
SCK input for SPI0
E5
Closed
MOSI for I2S digital microphone left channel
E6
Closed
ADC0, Analog microphone left channel
E7
Closed
ADC1, Analog microphone right channel
E8
Closed
DA out to OPAMP, audio out
E9
Closed
P201/MD signal, cut it then the J8, J9 can be debug out function
7. MCU Port Mapping
Here are the port and pin assignments for the kit.
Table 3. MCU Port Assignments
Port
Assigned Function(s)
P000
Analog microphone, left channel
P001
Analog microphone, right channel
P002
Test point 4 (TP4)
P013
Test point 7 (TP7)
P014
Audio out DAC
P015
Test point 8 (TP8)
P100
If configure as QSPI, it is QSPI CLK signal for QSPI flash.
If configure as PMOD, it can be RXD/SCL/MISO signal.
P101
If configure as QSPI, it is QSPI DQ1 signal for QSPI flash.
If configure as PMOD, it can be TXD/SDA/MOSI signal.
P102
If configure as QSPI, it is QSPI DQ0 signal for QSPI flash.
If configure as PMOD, it can be NC/NC/SCK signal.
P103
If configure as PMOD, it can be CTS_RTS/NC/SS signal.
P104
GPT1 output for SCK to I2S D-MIC
P108
Debug, SWDIO for SWD or TMS for JTAG
P109
MOSI for I2S digital microphone left channel, when debug, it is TDO for JTAG
P110
Debug, TDI for JTAG, or PMOD GPIO3
P111
SPICLK input
P112
SPI SS input
P200
NMI, pull-high with 10K
P201/MD
Boot Mode, The MCU enter SCI and USB boot mode if the MD pin is held low on release
the reset signal, it is for download code to MCU flash memory.
or PMOD GPIO1
P206
PMOD GPIO2
P207
QSPI_CS# for QSPI flash
P212/EXTAL
LED3, user LED, blue color
P213/XTAL
LED2, user LED, green color
P300
Debug, SWCLK for SWD or TCK for JTAG
P301
WS output to I2S digital microphone
P302
PMOD, can be GPIO or IRQ5
P402
User switch(S1), also IRQ4
P407
USB VBUS, USB cable connection monitor pin
P408
JLOB VCOM TXD
P409
JLOB VCOM RXD
P500
LED1, user LED, red color

Renesas VUI Reference Solution VOICE-RA4E1 Engineering Manual
VOICE-RA4E1 Engineering Manual Rev.1.0 Page
9
of 14
June 2022
8. Implementation Details
8.1 QSPI NOR flash
There is one QSPI NOR Flash on board. The device is Dialog AT25SF641B-MHB-T, 64 Mbit (8 Mbyte) in a
8-pad Ultra-Thin DFN (5 x 6 x 0.6mm) package. The QSPI port of RA4E1 is configured as Fast Read Dual
I/O mode on this kit.
Table 4. QSPI Flash Port Assignments
MCU Port
QSPI Signal
QSPI Pin
P100
CLK
6
P207
Chip Select
1
P102
DQ0
5
P101
DQ1
2
8.2 PMOD
One PMOD type 2A/3A/6A connectors (2x6 pin, dual row, right angle socket) is included. If the RA4E1 SCI0
has been configured as Simple I2C, please insert a jumper on header J16 to route SDA signal to PMOD
connector pin 4 for meet PMOD 6A pin definition.
Table 5. PMOD Port Assignments (J15)
MCU Port
PMOD Type
2A Signal
(SPI)
PMOD Type
3A Signal
(UART)
PMOD Type
6A Signal
(I2C)
PMOD connector Pin
P103
SS
CTS_RTS
1
P101
MOSI
TXD
2
P100
MISO
RXD
SCL
3
P102
SCK
SDA(P101)
4
GND
GND
GND
5
+3.3V
+3.3V
+3.3V
6
P302
INT
INT
INT
7
P303
GPIO
GPIO
GPIO
8
P304
GPIO
GPIO
GPIO
9
P208
GPIO
GPIO
GPIO
10
GND
GND
GND
11
+3.3V
+3.3V
+3.3V
12
Figure 4. PMOD connector

Renesas VUI Reference Solution VOICE-RA4E1 Engineering Manual
VOICE-RA4E1 Engineering Manual Rev.1.0 Page
10
of 14
June 2022
8.3 Microphones
This board includes a pair of analog MEMS microphones (M2 & M3, ZillTek ZTS6053). These 2 analog
microphone signals are amplified by Renesas READ2302GSP OPAMP, then fed to RA4E1 ADC channels 0
& 1. One digital I2S MEMS microphone (M1, ZillTek ZTS6672) is also provided, which is connected to
RA4E1 SPI0 channels. The physical distance between each 2 microphones is 50mm to support
beamforming applications.
Table 6. Analog MEMS Microphone left channel (M2) Port Assignments
MCU Port
MEMS microphone Pin
P000
1 –OUT
2 –GND
3 –GND
4 –GND
5 –VDD
Table 7. Analog MEMS Microphone right channel (M3) Port Assignments
MCU Port
MEMS microphone Pin
P001
1 –OUT
2 –GND
3 –GND
4 –GND
5 –VDD
Table 8. Digital I2S MEMS Microphone left channel (M1) Port Assignments
MCU Port
SPI0 Signal
MEMS microphone Pin
P112
SSLA0
1 –LRC (Word Select)
GND –for Select as left channel
2 –SELECT
GND
3 –GND
P111
RSPCK0
4 –BCLK
3.3V
5 –VDD
P109
MOSI0
6 –DATA
7 –CONFIG
8.4 Audio out
A stereo headphone jack is connected to the MCU DAC. The DAC signals are connected through an
OPAMP. The device is Renesas READ2302GSP, in ultra-small 8 pins TSSOP packages.
Table 9. Headphone Jack Pin Assignments
MCU Port
Audio out Signal
Headphone Jack Pin
P014 (DA0)
VOUT1
1 (Sleeve)
VOUT2
2 (Mono signal)
VOUT2
3 (Mono signal)
8.5 LEDs
3 LED are included on the board and are connected to the MCU I/O. These are Red, Green, and Blue, and
can be used for any user defined functions.
Table 10. User LED Port Assignments
MCU Port
Connected User LED
P500
Red (D2)
P213
Green (D3)
P212
Blue (D4)
D5 (blue) is power LED, and D8 (Green) is debug status LED to indicate the status of the JLOB connection.

Renesas VUI Reference Solution VOICE-RA4E1 Engineering Manual
VOICE-RA4E1 Engineering Manual Rev.1.0 Page
11
of 14
June 2022
8.6 Buttons
There are two mechanical push-button switches on the board. One button is for system/MCU reset (S2).
The second button is a user programmable button (S1).
Table 11. User Button Port Assignment (S1)
MCU Port
User Button Interrupt
P402
IRQ4
8.7 Debug
The VOICE-RA4E1 board supports following three debug modes.
Debug Modes
Debug MCU
(one that connects
to the IDE on PC)
Target MCU
(one that is being
debugged)
Debugging
Interface/Protocol
Connector Used
Debug on-board
RA4M2 (on-board)
RA4E1 (on-board)
SWD, JTAG
Micro USB (J6)
Debug in
External debugging
tools
RA4E1 (on-board)
SWD, JTAG
20-pin connector (J9)
or 10-pin connector
(J8)
Debug out
RA4M2 (on-board)
Any external RA
MCU
SWD, JTAG
20-pin connector (J9)
or 10-pin connector
(J8)
Notes:
• Please cut E9 for Debug out function
• See Table 14 for the Debug USB connector pin definition.
• See Table 15 for the 10-pin JTAG connector pin definition.
• See Table 16 for the 20-pin JTAG connector pin definition.
Table 12. Jumper Connection Summary for Different Debug
Debug Modes
J7
Debug on-board
Open
Debug in
Closed
Debug out
Open
The J-Link On-Board (JLOB) debug interface supporting JTAG, SWD debug interface and also supports the
VCOM (Virtual COM port) function. The debug MCU is a Renesas RA4M2, programmed with J-Link firmware
licensed by Segger. This interface includes one USB micro-B connector (J6) for host debug through the J-
Link MCU, one 10-pin and one 20-pin debug header (supporting JTAG and SWD).
Table 13. Debug USB Connector
Debug USB Connector(J6)
VOICE-RA4E1
Pin
Description
Signal / Bus
J6-1
+5VDC
VBUS2 / TP5
J6-2
Data-
D_N
J6-3
Data+
D_P
J6-4
USB ID, jack internal switch, cable inserted
N.C.
J6-5
Ground
GND / TP6

Renesas VUI Reference Solution VOICE-RA4E1 Engineering Manual
VOICE-RA4E1 Engineering Manual Rev.1.0 Page
12
of 14
June 2022
Table 14. 10-pin JTAG/SWD Connector (J8)
Pin
JTAG Pin Name
SWD Pin Name
Signal/Bus
J9-1
Vtref
Vtref
+3V3
J9-2
TMS
SWDIO
P108/SWDIO
J9-3
GND
GND
GND
J9-4
TCK
SWCLK
P300/SWCLK
J9-5
GND
GND
GND
J9-6
TDO
P109
J9-7
Key
Key
N.C.
J9-8
TDI
P110
J9-9
GND Detect
GND Detect
GND
J9-10
nSRST
nSRST
RESET#
Table 15. 20-pin JTAG/SWD Connector (J9)
Pin
JTAG Pin Name
SWD Pin Name
Signal/Bus
J9-1
Vtref
Vtref
+3V3
J9-2
TMS
SWDIO
P108/SWDIO
J9-3
GND
GND
GND
J9-4
TCK
SWCLK
P300/SWCLK
J9-5
GND
GND
GND
J9-6
TDO
P109
J9-7
Key
Key
N.C.
J9-8
TDI
P110
J9-9
GND Detect
GND Detect
GND
J9-10
nSRST
nSRST
RESET#
J9-11
GND
GND
GND
J9-12
N/A
N/A
N.C.
J9-13
GND
GND
GND
J9-14
N/A
N/A
N.C.
J9-15
GND
GND
GND
J9-16
N/A
N/A
N.C.
J9-17
GND
GND
GND
J9-18
N/A
N/A
N.C.
J9-19
N/A
N/A
GND
J9-20
N/A
N/A
N.C.
Table 16. Debug Port Signal Assignments
RA4E1 MCU Port
Debug signal usage
P108
TMS/SWDIO
P109
TDO
P110
TDI
P300
TCK/SWCLK

Renesas VUI Reference Solution VOICE-RA4E1 Engineering Manual
VOICE-RA4E1 Engineering Manual Rev.1.0 Page
13
of 14
June 2022
8.8 Power
5 V may be supplied from an external USB host to the USB Debug connector (J6) labelled with J-Link OB
on the board or from USB type-C connector(J1) labelled with DEVICE USB.
Figure 5. VOICE-RA4E1 Power Block Diagram
8.9 USB
The board includes one USB TYPE-C connector (J1), supporting USB Full Speed device mode.
Table 17. USB Full Speed / USB Type-C Signal Assignments (J1)
MCU Port
USB FS Signal
USB-C Signal Name
USB-C Connection
GND
GND
A1
N.C.
TXp1
A2
N.C.
TXn1
A3
VBUS1
VBUS
A4
N.C.
CC1
A5
USB_DP
USB1_P
DP1
A6
USB_DN
USB1_N
DN1
A7
N.C.
SBU1
A8
VBUS1
VBUS
A9
N.C.
RXN2
A10
N.C.
RXP2
A11
GND
GND
A12
GND
GND
B1
N.C.
TXP2
B2
N.C.
TXN2
B3
VBUS1
VBUS
B4
N.C.
CC2
B5
USB_DP
USB1_P
DP2
B6
USB_DN
USB1_N
DN2
B7
N.C.
SBU2
B8
VBUS1
VBUS
B9
N.C.
RXN1
B10
N.C.
RXP1
B11
GND
GND
B12

Renesas VUI Reference Solution VOICE-RA4E1 Engineering Manual
VOICE-RA4E1 Engineering Manual Rev.1.0 Page
14
of 14
June 2022
9. Certifications
To support international distribution, the following certification requirements are met, both by design and test.
Americas: FCC Class B
Europe: CE Class B
Revision History
Rev.
Date
Description
Page
Summary
1.0
June 2022
Initial release

Engineering Manual for Project VOICE-RA4E1
Publication Date: May . 11. 2022
Published by: Renesas Electronics Corporation

Eng Manual VOICE-RA4E1
Renesas VUI Reference Solution
VOICE-RA4E1 Engineering Manual