E73-TBB

Overview

The EBYTE E73-TBB hardware provides support for the Nordic Semiconductor nRF52832 ARM Cortex-M4F CPU and the following devices:

  • ADC

  • CLOCK

  • FLASH

  • GPIO

  • I2C

  • MPU

  • NVIC

  • PWM

  • RADIO (Bluetooth Low Energy)

  • RTC

  • Segger RTT (RTT Console)

  • SPI

  • UART

  • WDT

More information about the board can be found at the E73-TBB website [1]. The Nordic Semiconductor Infocenter [2] contains the processor’s information and the datasheet.

Hardware

E73-TBB has two external oscillators. The frequency of the slow clock is 32.768 kHz. The frequency of the main clock is 32 MHz. Additionally the board features CH340 USB-UART converter. It is possible to connect external BT antenna using U.FL socket and solder NFC antenna using NFC_ANT connector.

Supported Features

The ebyte_e73_tbb board supports the hardware features listed below.

on-chip / on-board
Feature integrated in the SoC / present on the board.
2 / 2
Number of instances that are enabled / disabled.
Click on the label to see the first instance of this feature in the board/SoC DTS files.
vnd,foo
Compatible string for the Devicetree binding matching the feature.
Click on the link to view the binding documentation.

See E73-TBB website [1] and Nordic Semiconductor Infocenter [2] for a complete list of nRF52832 hardware features.

Connections and IOs

LED

  • LED0 (red) = P0.17

  • LED1 (red) = P0.18

Push buttons

  • BUTTON0 = SW1 = P0.14

  • BUTTON1 = SW2 = P0.13

External Connectors

P1 Header

PIN #

Signal Name

1

GND

2

3.3V

3

P0.04

4

P0.03

5

P0.02

6

P0.31

7

P0.30

8

P0.29

9

P0.28

10

P0.27

11

P0.26

12

P0.25

P2 Header

PIN #

Signal Name

1

P0.24

2

P0.23

3

P0.22

4

SWDIO

5

SWDCLK

6

P0.21/RST

7

P0.20

8

P0.19

9

P0.16

10

P0.15

11

P0.12

12

P0.11

NFC_ANT

PIN #

Signal Name

1

P0.10

2

P0.09

Programming and Debugging

The ebyte_e73_tbb board supports the runners and associated west commands listed below.

flash debug

Flashing

Follow the instructions in the Nordic nRF5x Segger J-Link page to install and configure all the necessary software. To flash the board connect pins: SWDIO, SWDCLK, RST, GND from E73-TBB to corresponding pins on your J-Link device, then build and flash the application in the usual way.

# From the root of the zephyr repository
west build -b ebyte_e73_tbb/nrf52832 samples/basic/blinky
west flash

Debugging

Refer to the Nordic nRF5x Segger J-Link page to learn about debugging Nordic chips with a Segger IC.

Testing the LEDs and buttons in the E73-TBB

There are 2 samples that allow you to test that the buttons (switches) and LEDs on the board are working properly with Zephyr:

:zephyr:code-sample:`blinky`
:zephyr:code-sample:`button`

You can build and flash the examples to make sure Zephyr is running correctly on your board. The button and LED definitions can be found in boards/ebyte/e73_tbb/ebyte_e73_tbb_nrf52832.dts.

References