ARTERY AT-START-WB415 User manual

AT-START-WB415 User Manual
2022.03.28 1Rev 1.10
Getting started with AT32WB415CCU7-7
Introduction
AT-START-WB415 is designed to help you explore the high performance of the 32-bit
microcontroller AT32WB415 that embeds ARM Cortex®-M4 core and wireless Bluetooth feature,
and help expedite application development.
AT-START-WB415 is an evaluation board based on AT32WB415CCU7-7 chip, with rich
peripherals including wireless Bluetooth transceiver, LED, buttons, and an USB micro-B connector.
This evaluation board comes with debugging/programming tool AT-Link-EZ, without the need of
other development tools.

AT-START-WB415 User Manual
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Contents
1Overview ................................................................................................................. 5
1.1 Features ...................................................................................................................5
1.2 Definition of terms .................................................................................................... 5
2Quick start .............................................................................................................. 6
2.1 Get started................................................................................................................6
2.2 AT-START-WB415 toolchains ................................................................................... 6
3Hardware and layout ............................................................................................. 7
3.1 Power supply selection............................................................................................. 9
3.2 IDD ........................................................................................................................... 9
3.3 Programming and debugging: embedded AT-Link-EZ .............................................. 9
3.4 Boot mode selection................................................................................................. 9
3.5 RF antenna device ................................................................................................. 10
3.6 External clock source ..............................................................................................11
3.6.1 BLE XTAL clock source..............................................................................................11
3.6.2 MCU HEXT clock source ...........................................................................................11
3.6.3 MCU LEXT clock source............................................................................................12
3.7 LEDs ......................................................................................................................12
3.8 Buttons...................................................................................................................13
3.9 USB OTG ............................................................................................................... 13
3.10 0 Ω resistors...........................................................................................................13
3.11 QFN48 I/O extension connector............................................................................. 13
4Schematic ............................................................................................................. 14
5Revision history................................................................................................... 17

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List of tables
Table 1. Boot mode selection jumper setting.......................................................................................9
Table 2. 0 Ω resistor settings .............................................................................................................13
Table 3. Document revision history....................................................................................................17

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List of figures
Figure 1. Hardware block diagram ......................................................................................................7
Figure 2. Top layer ...............................................................................................................................8
Figure 3. Bottom layer .........................................................................................................................8
Figure 4. RF antenna pattern design dimensions ............................................................................. 11
Figure 5. Schematic (AT-Link-EZ).....................................................................................................14
Figure 6. Schematic (microcontroller)................................................................................................15
Figure 7. Schematic (power supply, peripherals and extension interfaces) .....................................16

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1 Overview
1.1 Features
AT-START-WB415 has the following characteristics:
AT32WB415CCU7-7 contains Bluetooth 5.0 dual mode, programmable protocols and
specifications, 2 Mbit/s data rate, and high-performance RF transmission/reception
AT-START-WB415 has an on-board AT32WB415CCU7-7 microcontroller that embeds ARM
Cortex®-M4 32-bit core, 256 KB Flash memory and 32 KB SRAM, in QFN48 7x7 mm
packages.
On-board AT-Link connector:
−On-board AT-Link-EZ can be used for programming and debugging (AT-Link-EZ is a
simplified version of AT-Link, without offline mode support)
Various power supply methods:
−USB bus of AT-Link-EZ
−USB OTG bus (VBUS) of AT-START-WB415
−External 3.3 V power supply
4 x LED indicators:
−LED1 (red) indicates 3.3 V power-on
−3 x USER LEDs, LED2 (red),LED3 (yellow) and LED4 (green), indicate operation status
Buttons (reset buttons for MCU and Bluetooth respectively)
16 MHz XTAL crystal
32.768 kHz LEXT crystal
QFN48 I/O extension interfaces
1.2 Definition of terms
Jumper JPx ON
Jumper is installed.
Jumper JPx OFF
Jumped is not installed.
Resistor Rx ON
Short by solder or 0Ω resistor.
Resistor Rx OFF
Open.

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2 Quick start
2.1 Get started
Configure the AT-START-WB415 board in the following sequence:
1. Check the Jumper position on board:
JP1 is connected to GND or OFF (BOOT0 = 0, and BOOT0 has an pull-down resistor in the
AT32WB415CCU7-7);
2. Connect AT_Link_EZ to PC via an USB cable (Type A to micro-B), and supply power to the
evaluation board via an USB connector CN1. LED1 (red) is always on, and the three other
LEDs (LED2 to LED4) start to blink in turn.
3. After pressing the user button (B3), the blink frequency of three LEDs are changed.
2.2 AT-START-WB415 toolchains
ARM®Keil®: MDK-ARM™
IAR™: EWARM

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3 Hardware and layout
AT-START-WB415 board is designed around an AT32WB415CCU7-7 microcontroller in QFN48
7x7 mm package.
Figure 1 shows the connections between AT-Link-EZ, AT32WB415CCU7-7 and their peripherals
(RF antenna, buttons, LEDs, USB OTG and extension connectors)
Figure 2 and Figure 3 shows their locations on the AT-Link-EZ and AT-START-WB415 board.
Figure 1. Hardware block diagram
RF
AT32WB415CCU7-7
I/O
I/O
I/O
I/O
NRST
MCU reset
button
User
button
Micro-USB
QFN48 I/O extension connector
QFN48 I/O extension connector
Antenna
AT-Link-EZ
User LED
LED2~LED4
Micro-USB
BLE reset
button
SMA
interface

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Figure 2. Top layer
QFN48 I/O extension
connector
AT32WB415CCU7-7
USB Micro-B
connector
QFN48 I/O extension
connector
LEXT 32.768 kHz
crystal
User
button
BLE reset
button
User LED
Boot mode
Select jumper
Power LED
MCU reset
button
AT-Link-EZ XTAL 16 MHz
crystal
IDD measurement
jumper
Antenna
BLE SMA interface
Figure 3. Bottom layer

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3.1 Power supply selection
The AT-START-WB415 can be provided with 5 V through a USB cable (either through USB
connector CN1 on AT-Link-EZ or USB OTG connector CN2 on AT-START-WB415). Then 5 V
power provides 3.3 V for the microcontroller and peripherals using on-board 3.3 V voltage regulator
(U2).
The VDD of J1 and J2 can also be used as 3.3 V input directly, soAT-START-WB415 board can
also be powered by a 3.3 V supply unit.
Note: 5 V power supply must be provided through USB connector (CN1) on AT-Link-EZ. Any other
method cannot power the AT-Link-EZ.
If another board is connected to J1 and J2, the VDD pin can be used as 3.3 V output.
3.2 IDD
When JP3 OFF (symbol IDD) and R38 OFF, an ammeter can be connected to measure the power
consumption of AT32WB415CCU7-7.
JP3 OFF, R38 ON:
AT32WB415CCU7-7 is powered. (Default setting and JP3 plug is not mounted before
shipping)
JP3 ON, R38 OFF:
AT32WB415CCU7-7 is powered.
JP3 OFF, R38 OFF:
An ammeter must be connected to measure the power consumption of AT32WB415CCU7-7 (If
there is no ammeter available, the AT32WB415CCU7-7 cannot be powered).
3.3 Programming and debugging: embedded AT-Link-EZ
The evaluation board integrates Artery AT-Link-EZ programming and debugging tools for users to
program/debug the AT32WB415CCU7-7 on the AT-START-WB415 board. AT-Link-EZ supports
SWD interface mode and a set of virtual COM ports (VCP) to connect to the
USART2_TX/USART2_RX (MCU PA2/MCU PA3) of AT32WB415CCU7-7.
Please refer to AT-Link User Manual for complete details on AT-Link-EZ.
3.4 Boot mode selection
At startup, two different boot modes are available for selection through pin configuration.
Table 1. Boot mode selection jumper setting
Jumper
BOOT0 pin configuration
Boot mode
JP1 connected to GND
or be OFF
0
Boot from the internal Flash memory
(Factory default setting)
JP1 connected to VDD
1
Boot from boot code area

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3.5 RF antenna device
On-board PIFA PCB antenna and antenna-related devices support transmission and reception of
2.4 GHz wireless signals. The AT-START-WB415 board also offers a SMA connector (RF1) that
can be externally connected to an instrument to test antenna-specific parameters such as power
and matching performance. When in use, C21 must be desoldered, and C40 must be soldered with
0 Ω or an appropriate match capacitor.
Murata GRM1555 0402 capacitor is recommended. The selection of PCB transmission line should
take into account PCB materials, board thickness, layers and copper thickness. Its impedance
should be limited to 50 Ω through the adjustments of matching devices. It is advised to use common
2-layer FR-4 materiall in 0.8~1.2 mm thickness and 1 oz copper sheet.
Note: It is recommended to follow the parameters of devices defined in Schematics and PCB layout when
desiging RF match circuit diagram, patten and PCB antenna in order to achieve the best quality of
signals.
RF antenna pattern design dimensions are shown in 错误 ! 未找到引用源。 . Attention should be
paid to the following:
Place RF antenna on the top layer. Top layer and the corresponding bottom layer should be of
clearance area and copper-free
No metal structure or components placed around antenna. Components or devices, if
necessary, can only be placed one side at most and kept 5 mm away from antenna
Antenna shorted pins (posts) are connected to the ground, with at least two Through holes
down to (directly) the bottom layer
0.5 mm or greater is required between antenna and PCB copper ground. Punch a row of
ground vias along the ground plane close to antenna
No routing and devices placed at the bottom layer (especially the area close to RF match
circuit) of AT32WB415 MCU. A complete ground plane allows for better RF performance