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
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