Renesas RA2 Series Installation and operation manual

Rev.1.0 September 2022
Renesas Advanced (RA) Family
RA2 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-RA2L1 Engineering Manual
Renesas VUI Reference Solution
Engineering Manual

VOICE-RA2L1 Engineering Manual
VOICE-RA2L1 Engineering Manual Rev.1.0 Page
1
of 14
June 2022
Renesas VUI Reference Solution
VOICE-RA2L1Engineering 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 Microphones............................................................................................................................................9
8.2 Audio out ...............................................................................................................................................10
8.3 LEDs......................................................................................................................................................10
8.4 Buttons ..................................................................................................................................................10
8.5 Debug....................................................................................................................................................11
8.6 Power ....................................................................................................................................................13
8.7 USB Type-C ..........................................................................................................................................13
9. Certifications..........................................................................................................................14
Revision History............................................................................................................................14

Renesas VUI Reference Solution VOICE-RA2L1 Engineering Manual
VOICE-RA2L1 Engineering Manual Rev.1.0 Page
2
of 14
June 2022
Figures
Figure 1. VOICE-RA2L1 Kit Contents ............................................................................................................... 3
Figure 2. System Block Diagram....................................................................................................................... 6
Figure 3. Copper Jumpers................................................................................................................................. 7
Figure 4. PMOD connector................................................................................................................................ 9
Figure 5. VOICE-RA2L1 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 5. PMOD Port Assignments (J15) ........................................................................................................... 9
Table 6. Analog MEMS Microphone left channel (M2) Port Assignments ........................................................ 9
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) .................................................................................................. 10
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 Type-C Signal Assignments (J1) ............................................................................................ 13

Renesas VUI Reference Solution VOICE-RA2L1 Engineering Manual
VOICE-RA2L1 Engineering Manual Rev.1.0 Page
3
of 14
June 2022
1. Overview
VOICE-RA2L1 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 RA2L1 MCU with LQFP
48pin package as the core logic device, with OPAMP and power devices chosen from the Renesas product
portfolio.
2. Kit Contents
The following components are included in the kit:
1. VOICE-RA2L1 board
2. Micro USB device cable (type-A male to micro-B male)
Figure 1. VOICE-RA2L1 Kit Contents
3. Kit Ordering Information
VOICE-RA2L1 kit orderable part number: TW001-VUIA2L1POCZ

Renesas VUI Reference Solution VOICE-RA2L1 Engineering Manual
VOICE-RA2L1 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:
⚫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
only.
⚫Form Factor: 7.5 x 6 cm
5. MCU Feature Support
The RA2L1 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 this kit hardware for voice applications.
◼Arm Cortex-M23 Core
•Armv8-M architecture with DSP instruction set
•Maximum operating frequency: 48 MHz
•Support for 4-GB address space
•On-chip debugging system: SWD
•Boundary scan and Arm Memory Protection Unit (Arm MPU) with 8 regions
◼Memory
•Up to 256KB code flash memory
•8-KB data flash memory (100,000 program/erase cycles minimum)
•32KB SRAM
•Memory Protection Units (MPU)
•128-bit unique ID
◼Connectivity
•Serial Communications Interface (SCI) × 5
•Serial Peripheral Interface (SPI) × 2
•I2C bus interface (IIC) × 2
◼Analog
•19 channel 12-bit A/D Converter (ADC12) with sample-and-hold circuits
•12-bit D/A Converter (DAC12) × 1
◼Timers
•General PWM Timer 32-bit (GPT32) × 4
•General PWM Timer 16-bit (GPT16) × 6
•Port Output Enable for GPT (POEG)
•Asynchronous General-Purpose Timer (AGT) × 2
◼Safety
•ECC in SRAM

Renesas VUI Reference Solution VOICE-RA2L1 Engineering Manual
VOICE-RA2L1 Engineering Manual Rev.1.0 Page
5
of 14
June 2022
•SRAM parity error check
•Flash area protection
•ADC self-diagnosis function
•Clock Frequency Accuracy Measurement Circuit (CAC)
•Cyclic Redundancy Check (CRC) calculator
•Data Operation Circuit (DOC)
•Port Output Enable for GPT (POEG)
•Independent Watchdog Timer (IWDT)
•GPIO readback level detection
•Register write protection
•Main oscillator stop detection
◼Security and Encryption
•AES128/256
•True Random Number Generator (TRNG)
◼System and Power Management
•Low power modes
•Switching regulator
•Realtime Clock (RTC)
•Event Link Controller (ELC)
•Data Transfer Controller (DTC)
•Key Interrupt Function (KINT)
•Power-on reset
•Low Voltage Detection (LVD) with voltage settings
◼Multiple Clock Sources
●Main clock oscillator (MOSC) (1 to 20 MHz)
●Sub-clock oscillator (SOSC) (32.768 kHz)
●High-speed on-chip oscillator (HOCO) (24/32/48/64 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)
●Clock out support
General-Purpose I/O Ports
•5V tolerance, open drain, input pull-up, switchable driving ability
Operating Voltage
•VCC: 1.6 to 5.5 V

Renesas VUI Reference Solution VOICE-RA2L1 Engineering Manual
VOICE-RA2L1 Engineering Manual Rev.1.0 Page
6
of 14
June 2022
6. Kit Architecture
6.1 System Block Diagram
Figure 2. System Block Diagram

Renesas VUI Reference Solution VOICE-RA2L1 Engineering Manual
VOICE-RA2L1 Engineering Manual Rev.1.0 Page
7
of 14
June 2022
6.2 Jumper Settings
Two types of jumpers are provided on the VOICE-RA2L1 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-RA2L1 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-RA2L1 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
SCI Boot mode : Close to configures the RA2L1 MCU enter SCI boot
mode, code can be download through J15 PMOD connector.
J3
Short
J3 labeled with “measure current”, it is for measure RA2L1 MCU
current, remove this jumper wire and serial with a current meter to
measure RA2L1 MCU current. The RA2L1 current is around 8.33mA.
J7
Open
Short with a jumper wire to set the on board debug RA4M2 MCU(U8)
in RESET for disable on board debug function.
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-RA2L1 Engineering Manual
VOICE-RA2L1 Engineering Manual Rev.1.0 Page
8
of 14
June 2022
Table 2. Default Copper Jumper Settings
Location
Default Open/Closed
Function
E1
Closed
SCK output to I2S digital microphone
E3
Closed
SCK input to RA2L1 GPT_POEG1
E6
Closed
ADC0, Analog microphone left channel
E7
Closed
ADC1, Analog microphone right channel
E8
Closed
DAC out to OPAMP, audio out
E9
Closed
P201/MD signal, cut it then the J8, J9 can be debug out function
E10
Closed
SCK input for SPI0
E11
Closed
MOSI for I2S digital microphone left channel
E12
Closed
SSL input for SPI0
E13
Closed
JLINK VCOM_RXD signal
E14
Closed
JLINK VCOM_TXD signal
E15
Closed
JLINK SWCLK signal
E16
Closed
JLINK SWDIO signal
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 11 (TP11)
P012
Test point 12 (TP12)
P013
Test point 13 (TP13)
P014
Audio out DAC
P015
Test point 14 (TP14)
P100
GPT5 output for SCK to I2S D-MIC left channel
P101
SPI0 MOSIA input form I2S D-MIC left channel
P102
SPI0 RSPCKA input
P103
SPI0 SSLA0 input
P104
SCK input to RA2L1 GPT_POEG1
P108
Debug, SWDIO for SWD
P109
Connect to PMOD(J15), it can be configured as MOSI/TXD/SDA
P110
Connect to PMOD(J15), it can be configured as MISO/RXD/SCL
P111
Connect to PMOD(J15), it can be configured as SPICLK
P112
Delayed SPI SS output signal to P103
P200
NMI, pull-high with 10K
P201/MD
Boot Mode, The RA2L1 enter SCI boot mode if the MD pin is held low on release the
reset signal, it is for download code to RA2L1 flash memory.
P206
PMOD GPIO1
P207
PMOD GPIO2
P208
PMOD GPIO3
P212/EXTAL
LED3, user LED, blue color
P213/XTAL
LED2, user LED, green color
P214/XCOUT
No connection, reserve for 32768Hz crystal
P215/XCIN
No connection, reserve for 32768Hz crystal
P300
Debug, SWCLK for SWD
P301
Connect to PMOD(J15), it can be configured as SPI SS(Slave Select)
P302
PMOD, can be GPIO or IRQ5
P400
User switch(S1), also IRQ0
P401
GPT6 output for WS to I2S D-MIC left channel
P407
Test point 10 (TP10)
P408
JLOB VCOM TXD

Renesas VUI Reference Solution VOICE-RA2L1 Engineering Manual
VOICE-RA2L1 Engineering Manual Rev.1.0 Page
9
of 14
June 2022
P409
JLOB VCOM RXD
P500
LED1, user LED, red color
8. Implementation Details
One PMOD type 2A/3A/6A connectors (2x6 pin, dual row, right angle socket) is included. If the RA2L1 SCI9
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 4. PMOD Port Assignments (J15)
MCU Port
PMOD Type
2A Signal
(SPI)
PMOD Type
3A Signal
(UART)
PMOD Type
6A Signal
(I2C)
PMOD connector Pin
P301
SPI_SS
1
P109
MOSI
TXD
2
P110
MISO
RXD
SCL
3
P111
SPI_SLK
SDA(P109)
4
GND
GND
GND
5
+3.3V
+3.3V
+3.3V
6
P302
INT
INT
INT
7
P206
GPIO
GPIO
GPIO
8
P207
GPIO
GPIO
GPIO
9
P208
GPIO
GPIO
GPIO
10
GND
GND
GND
11
+3.3V
+3.3V
+3.3V
12
Figure 4. PMOD connector
8.1 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 RA2L1 ADC channels 0
& 1. One digital I2S MEMS microphone (M1, ZillTek ZTS6672) is also provided, which is connected to
RA2L1 SPI0 channels. The physical distance between the 2 analog microphones is 50mm for support
beamforming applications.
Table 5. Analog MEMS Microphone left channel (M2) Port Assignments
MCU Port
MEMS microphone Pin
P000
1 –OUT
2 –GND
3 –GND
4 –GND
5 –VDD