User's Manual

Table of Contents
1. Overview ............................................................................................................................ 7
1.1 Package Components ................................................................................................................................ 7
1.2 Purpose ...................................................................................................................................................... 7
1.3 Features ..................................................................................................................................................... 7
1.4 Preparation ................................................................................................................................................ 7
1.5 EK-RA4W1: Table of Specifications .......................................................................................................... 8
1.6 Block Diagram ............................................................................................................................................ 9
2. Board Layout ................................................................................................................... 10
3. Parts Layout .................................................................................................................... 11
4. Operating Environment .................................................................................................... 12
5. User Circuits .................................................................................................................... 13
5.1 Evaluation MCU ....................................................................................................................................... 13
5.2 Bluetooth

Low Energy ............................................................................................................................ 13
5.3 Emulator ................................................................................................................................................... 14
5.4 USB-to-Serial Conversion ........................................................................................................................ 15
5.5 ACT LED .................................................................................................................................................. 15
5.6 Power LED ............................................................................................................................................... 15
5.7 User LEDs ................................................................................................................................................ 15
5.8 External Power-Supply Header ............................................................................................................... 16
5.9 Pmod Connector ................................................................................................................................... 17
5.10 Arduino UNO Headers .......................................................................................................................... 18
5.11 Current Measurement Header ................................................................................................................. 20
5.12 MCU Headers .......................................................................................................................................... 20
5.13 Reset Switch ............................................................................................................................................ 20
5.14 User Switch .............................................................................................................................................. 20
5.15 Patterns for Cutting .................................................................................................................................. 20
6. Configurations ................................................................................................................. 22
6.1 Modifying the EK-RA4W1 ........................................................................................................................ 22
6.2 Analog Power Supply ............................................................................................................................... 22
6.3 On-Chip Oscillator .................................................................................................................................... 23
7. Handling Precautions ....................................................................................................... 24
7.1 Adding Load ............................................................................................................................................. 24
7.2 Remodeling the Board ............................................................................................................................. 24
8. Additional Information ...................................................................................................... 25
9. Certification of Compliance .............................................................................................. 26
9.1 Radio-Related Laws ................................................................................................................................. 26