Silicon Laboratories UG172 User manual

UG172: Wizard Gecko Wi-Fi® Module

Wireless Starter Kit SLWSTK6120A User's

Guide

The SLWSTK6120A is an excellent starting point to get familiar

with the WGM110 Wi-Fi Module.

The Wireless Starter Kit Mainboard contains sensors and peripherals demonstrating

some of the WGM110's many capabilities. The kit provides all necessary tools for devel-

oping Wi-Fi wireless applications.

KIT FEATURES

• Supplied with WGM110 Wi-Fi Module

BRD4320A

• USB connectivity

•SEGGER J-Link on-board debugger

• Debug Multiplexer supporting external

hardware as well as radio board

• Silicon Labs' Si7021 Relative Humidity and

Temperature sensor

• Ultra low power 128x128 pixel Memory

LCD

• LEDs / Push buttons / Reset button

• 20-pin 2.54 mm header for expansion

boards

• Breakout pads for direct access to all

WGM110 I/O pins

• Power sources

• USB

• 2 x AA battery holder

EXTENSION BOARD FEATURES

• Accelerometer

• Buttons and LEDs

• Joystick

• I2C Expansion

ORDERING INFO

• SLWSTK6120A

RADIO BOARD FEATURES

• WGM110 Wizard Gecko Wi-Fi Module

• 1 MB Flash

•128 kB RAM

• P/N WGM110

• Integrated high performance chip antenna

• Transmit power +16 dBm

• CPU core 32-bit ARM Cortex-M3

SOFTWARE SUPPORT

• Wizard Gecko Wi-Fi Software

• Wizard Gecko Wi-Fi SDK

•Example applications for the kit

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1. Introduction

1.1 Description

SLWSTK6120A provides a complete development platform for Silicon Labs' Wizard Gecko WGM110Wi-Fi Module. The core of the

SLWSTK6120A is the Wireless Starter Kit Mainboard which features an on-board J-Link debugger, a virtual COM port interface, an LCD

display and a humidity/temperature sensor and through-holes to access all the pins of the Wizard Gecko Wi-Fi Module. The Mainboard

also contains two push-buttons and LEDs which can be used in user application testing. The WSTK Mainboard is paired with an Wizard

Gecko WGM110 Wi-Fi Module Radio Board that plugs directly into the Mainboard. The Radio Board includes the WGM110 Module with

a built-in high performance chip antenna, a microSD card slot and a USB interface for data transfer and power supply connection ena-

bling stand-alone testing.

WSTK6120A Wireless Starter Kit is also supplied with an Expansion Board (BRD8006A Add-on Board) that can be connected to the

WSTK Mainboard expansion header. The Expansion Board contains additional peripherals such as an accelerometer, buttons, LEDs, a

joystick and pads for I2C expansion.

To support software development with SLWSTK6120A for the Wizard Gecko WGM110 Wi-Fi Module Silicon Labs also offers a free

SDK. The SDK includes BGTool™ which can be used to configure the WGM110 Module and test its functionality.

1.2 Kit Contents

The following items are contained in the Wizard Gecko Wi-Fi Wireless Starter Kit box:

• 1 x BRD4001A Wireless Starter Kit Mainboard

• 1 x BRD4320A Wizard Gecko WGM110 Wi-Fi Module Radio Board

• 1 x Expansion Board

• 1 x battery holder for 2 x AA batteries (batteries not included)

• 1 x USB Type A <-> USB Mini-B cable

• 1 x USB Type A <-> USB Micro-B cable

Please refer to Wizard Gecko WGM110 Wi-Fi® Module Radio Board BRD4320A Reference Manual for features of the included

BRD4320A Radio Board.

1.3 Getting Started

Detailed instructions for how to get started with your new Wizard Gecko Wi-Fi Wireless Starter Kit can be found on the Silicon Labs web

pages:

http://www.silabs.com/start-wgm

UG172: Wizard Gecko Wi-Fi® Module Wireless Starter Kit SLWSTK6120A User's Guide

Introduction

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2. Kit Hardware Layout

The layout of the Wizard Gecko Wi-Fi Module Wireless Starter Kit is shown below.

WGM110

Module

Radio Board

Radio Board breakout pads

1.28" Memory-LCD Display

Ultra-low power

128 x 128 pixel resolution

SPI interface

Ethernet RJ-45

J-Link Debugger

Virtual COM port

Packet Trace

Advanced Energy Monitoring

USB mini-B

J-Link Debugger

Virtual COM port

Packet Trace

Advanced Energy Monitoring

Coin Cell Holder

CR2032 Battery

Power Select Switch

BAT / USB / AEM

2x User Push Buttons 2x User LEDs Simplicity Connector

External targets:

Virtual COM port

Packet Trace

Advanced Energy Monitoring

Debug Connector

ARM Coresight 19-pin

OUT: External targets

IN: External debug probes

Reset Button

Si7021

Relative Temperature &

Humidity Sensor

EXP Header

Expansion board connector

Expansion Board

3-axis Accelerometer

2x Push Buttons

2x LEDs

Analog Joystick

I2C device footprint

microSD/SDHC card slot

On the bottom side of the Radio Board

Figure 2.1 SLWSTK6120A Hardware Layout

Note: Some of the features and/or connections described in the above figure are not supported when using the WSTK with the

WGM110 Module. For more details see later sections in this document.

UG172: Wizard Gecko Wi-Fi® Module Wireless Starter Kit SLWSTK6120A User's Guide

Kit Hardware Layout

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3. Kit Block Diagram

An overview of the Wizard Gecko Wi-Fi Module Wireless Starter Kit is shown in the figure below.

WGM110

WiFi Module

USB Mini-B

Connector

RJ-45 Ethernet

Connector

Debug

UART

AEM

Multiplexer

Debug

UART

Packet Trace

AEM

Debug

UART

Packet Trace

AEM

Simplicity

Connector

Debug

Connector

User Buttons

& LEDs

128 x 128 pixel

Memory LCD

GPIO

Board

Controller

OUT

MCU

I2C Si7021

Temperature

& Humidity

Sensor

SPI

ADC Input

GPIO

SPI

USB Micro-B

Connector

Micro-SD

card reader

Accelerometer

BMA280

Analog

Joystick

Buttons

LEDs

Footprint for

I2C security

device

I2C

WSTK Mainboard

Peripherals

Expansion Board Peripherals

Radio Board

Peripherals

USB

WSTK Mainboard

Figure 3.1 SLWSTK6120A Block Diagram

UG172: Wizard Gecko Wi-Fi® Module Wireless Starter Kit SLWSTK6120A User's Guide

Kit Block Diagram

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4. Connectors

This chapter gives you an overview of the Wireless Starter Kit Mainboard connectivity. The placement of the connectors can be seen in

the figure below.

Simplicity

Connector

In/Out Debug

Header

GND

P25

P24

P27

P26

P29

P28

P31

P30

P33

P32

P35

P34

P37

P36

P39

P38

P41

P40

P43

P42

P45

P44

GND

Radio Board

Connectors

Expansion

Header

GND

VMCU

P11

P10

P13

P12

P15

P14

P17

P16

P19

P18

P21

P20

GND

P23

P22

VRF

3V3

Figure 4.1 Connector Layout

4.1 Breakout pads

Most of the WGM110's pins are routed from the Radio Board to breakout pads at the top and bottom edges of the Wireless Starter Kit

Mainboard. A 2.54 mm pitch pin header can be soldered on for easy access to the pins. The figure below shows you how the pins of

the WGM110 map out to the pin numbers printed on the breakout pads. To see the available functions on each, please refer to the

WGM110 Data Sheet.

GND

VMCU

P23 / NC

P21 / NC

P19 / NC

P17 / NC

GND

P15 / NC

P13 / PE0 / I2C_SDA

P11 / PD5

P9 / PD4

P7 / PD3

P5 / PD2 / SD_CLK / DISP_SCLK

P3 / PD1 / SD_MISO

P1 / PD0 / SD_MOSI / DISP_SI

GND

NCNC

P45 / NCNC / P44

P43 / NCNC / P42

P41 / NCNC / P40

3V33V3

P39 / PC15 / DISP_COMNC / P38

P37 / PC9 / SENSOR_ENNC / P36

P35 / PC14 / DISP_SCSNC / P34

P33 / PC13 / DISP_ENNC / P32

P31 / PD7 / SD_CSWIFI_CS / P30

P29 / PD6 / SD_CDWIFI_CLK / P28

P27 / PE11 / VCOM_RXWIFI_MOSI / P26

P25 / PE10 / VCOM_TXWIFI_MISO / P24

GNDGND

VRF

GND

VMCU

VCOM_EN / PE2 / P22

LED1 / PC1 / P20

LED0 / PC0 / P18

BUTTON1 / PA6 / P16

GND

BUTTON0 / PA2 / P14

I2C_SCL / PE1 / P12

VCOM_RTS / PE13 / P10

VCOM_CTS / PE12 / P8

PE15 / P6

PE14 / P4

PB12 / P2

PB11 / P0

VRF

J101 J102

Figure 4.2 Radio Board Pin Mapping on Breakout Pads

UG172: Wizard Gecko Wi-Fi® Module Wireless Starter Kit SLWSTK6120A User's Guide

Connectors

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4.2 Expansion Header

On the right hand side of the board an angled 20-pin expansion header is provided to allow connection of peripherals or plug-in boards.

The connector contains a number of I/O pins that can be used with most of the WGM110 Wizard Gecko's features. Additionally, the

VMCU, 3V3 and 5V power rails are also exported.

The connector follows a standard which ensures that commonly used peripherals such as an SPI, a UART and an I2C bus are available

on fixed locations in the connector. The rest of the pins are used for general purpose I/O. This allows the definition of expansion boards

that can plug into a number of different Silicon Labs Starter Kits.

The figure below shows the pin assignment of the expansion header for the Wizard Gecko Wi-Fi Module Wireless Starter Kit. Because

of limitations in the number of available GPIO pins, some of the expansion header pins are shared with kit features.

1516

20 19

VMCU

PD0

PD1

PD2

PD3

PD4

PD5

PE0

3V3

GND

PB11

PB12

PE14

PE15

PE12

PE13

PE1

Board ID SDA

Board ID SCL

Reserved (Board Identification)

WGM110 I/O Pin

Alternate function

SPI_MOSI

SPI_MISO

SPI_SCK

SPI_CS

UART_TX

UART_RX

I2C_SDA

GPIO

(VCOM_CTS)

(VCOM_RTS)

I2C_SCL

Figure 4.3 Expansion Header

The pin-routing available on the WGM110 Module is very flexible, so most peripherals can be routed to any pin. However, many pins

are shared between the Expansion Header and other functions on the Wireless STK Mainboard. Table 4.1 Expansion Header Pinout on

page 5 includes an overview of the mainboard features that share pins with the Expansion Header.

Table 4.1. Expansion Header Pinout

Pin Connection EXP Header function Shared feature Peripheral mapping

4 PD0 SPI_MOSI SD_MOSI / DISP_SI USART1 TX Location 1

6 PD1 SPI_MISO SD_MISO USART1 RX Location 1

8 PD2 SPI_SCLK SD_CLK / DISP_SCLK USART1_CLK Location 1

10 PD3 SPI_CS USART1_CS Location 1

12 PD4 UART_TX USART0_TX Location 0

14 PD5 UART_RX USART0_RX Location 0

16 PE0 I2C_SDA SENSOR_I2C_SDA I2C1_SDA Location 2

3 PB11 GPIO

5 PB12 GPIO

7 PE14 GPIO

9 PE15 GPIO

11 PE12 GPIO VCOM_CTS

13 PE13 GPIO VCOM_RTS

15 PE1 I2C_SCL SENSOR_I2C_SCL I2C1_SCL Location 2

UG172: Wizard Gecko Wi-Fi® Module Wireless Starter Kit SLWSTK6120A User's Guide

Connectors

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4.3 Debugging

Note: The Wireless Starter Kit Mainboard does not support this feature when used together with the Wizard Gecko WGM110 Module;

however, BGTool can be used to debug BGAPI commands and error situations.

Note: For more information on BGTool go to Silicon Labs web page http://www.silabs.com/start-wgm and download the UG160: Wizard

Gecko BGTool™ User's Guide.

The Debug Connector serves a dual purpose. Based on the "debug mode", which can be set up using Simplicity Studio. In the "Debug

IN" mode this connector allows an external debug emulator to be used with the on-board WGM110. In the "Debug OUT" mode this

connector allows the kit to be used as a debugger towards an external target. In the "Debug MCU" (default) mode this connector is

isolated from the debug interface of both the Board Controller and the on-board target device.

"The Debug Connector has three 'debug modes,' which are set using Simplicity Studio. The 'Debug MCU' mode is default and the two

other modes ('Debug IN' and 'Debug OUT') are set using Simplicity Studio.

Because this connector is automatically switched to support the different operating modes, it is only available when the Board Controller

is powered (J-Link USB cable connected). If debug access to the target device is required when the Board Controller is unpowered, this

should be done by connecting directly to the appropriate breakout pins.

The pinout of the connector follows that of the standard ARM Cortex Debug+ETM 19-pin connector. The pinout is described in detail

below.

1 2

13 14

15 16

17 18

TMS / SWDIO / C2D

TCK / SWCLK / C2CK

TDO / SWO

TDI / C2Dps

TRACECLK

TRACED0

TRACED1

TRACED2

TRACED3

RESET / C2CKps

Vdevice

GND

Cable Detect

GND

Figure 4.4 Debug Connector

Note that the pin-out matches the pin-out of an ARM Cortex Debug+ETM connector, but these are not fully compatible as pin 7 is physi-

cally removed from the Cortex Debug+ETM connector. Some cables have a small plug that prevent them from being used when this pin

is present. If this is the case, remove the plug, or use a standard 2x10 1.27 mm straight cable instead.

Table 4.2. Debug Connector Pin Descriptions

Pin number(s) Function Note

1 VTARGET Target voltage on the debugged application.

2 TMS / SDWIO / C2D JTAG test mode select, Serial Wire data or C2 data

4 TCK / SWCLK / C2CK JTAG test clock, Serial Wire clock or C2 clock

6 TDO/SWO JTAG test data out or Serial Wire Output

8 TDI / C2Dps JTAG test data in, or C2D "pin sharing" function

10 RESET / C2CKps Target device reset, or C2CK "pin sharing" function

12 TRACECLK ETM Trace Clock

14 TRACED0 ETM Trace Data 0

16 TRACED1 ETM Trace Data 1

18 TRACED2 ETM Trace Data 2

20 TRACED3 ETM Trace Data 3

UG172: Wizard Gecko Wi-Fi® Module Wireless Starter Kit SLWSTK6120A User's Guide

Connectors

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Pin number(s) Function Note

9 Cable detect This signal must be pulled to ground by the external debugger or application for ca-

ble insertion detection.

11, 13 NC Not connected

3, 5, 15, 17, 19 GND

UG172: Wizard Gecko Wi-Fi® Module Wireless Starter Kit SLWSTK6120A User's Guide

Connectors

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4.4 Simplicity Connector

Note: The Wireless Starter Kit Mainboard does not support this feature when used together with the Wizard Gecko WGM110 Module.

The Simplicity Connector featured on the Wireless Starter Kit Mainboard allows the Virtual COM port interface to be used towards an

external target. The pinout is illustrated in the figure below.

The Simplicity Connector featured on the Wireless Starter Kit Mainboard enables advanced debugging features such as the AEM, the

Virtual COM port and the Packet Trace Interface to be used towards an external target. The pinout is illustrated in the figure below.

VMCU 1

33V3

GND

Board ID SCL

Board ID SDA

2Virtual COM TX / MOSI

4Virtual COM RX / MISO

6 Virtual COM CTS / SCLK

8Virtual COM RTS / CS

10 Packet Trace 0 Sync

12 Packet Trace 0 Data

14 Packet Trace 0 Clock

16 Packet Trace 1 Sync

18 Packet Trace 1 Data

20 Packet Trace 1 Clock

Figure 4.5 Simplicity Connector

Current drawn from the VMCU voltage pin is included in the AEM measurements, while the 3V3 and 5V voltage pins are not. To monitor

the current consumption of an external target with the AEM, unplug the BRD4320A Radio Board from the WSTK Mainboard to avoid

having the Radio Board current consumption added to the measurements.

Table 4.3. Simplicity Connector Pin Descriptions

Pin number(s) Function Note

1 VMCU 3.3 V power rail, monitored by the AEM

3 3V3 3.3 V power rail

5 5V 5 V power rail

2 VCOM_TX_MOSI Virtual COM Tx/MOSI

4 VCOM_RX_MISO Virtual COM Rx/MISO

6 VCOM_CTS_#SCLK Virtual COM CTS/SCLK

8 VCOM_#RTS_#CS Virtual COM RTS/CS

10 PTI0_SYNC Packet Trace 0 Sync

12 PTI0_DATA Packet Trace 0 Data

14 PTI0_CLK Packet Trace 0 Clock

16 PTI1_SYNC Packet Trace 1 Sync

18 PTI1_DATA Packet Trace 1 Data

20 PTI1_CLK Packet Trace 1 Clock

17 EXT_ID_SCL Board ID SCL

19 EXT_ID_SDA Board ID SDA

7, 9, 11, 13, 15 GND

UG172: Wizard Gecko Wi-Fi® Module Wireless Starter Kit SLWSTK6120A User's Guide

Connectors

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5. Power Supply and Reset

This section explains the power supply options and reset functionalities of the WSTK.

5.1 Radio Board Power Selection

The WGM110 Module on the Wireless Starter Kit can be powered by either one of the three sources listed below:

• USB Debug cable

• 2 x AA sized batteries using the external battery holder supplied with the WSTK

• USB Connector on the BRD4320A Radio Board

Selecting the power source is done with the slide switch in the lower left corner of the WSTK Mainboard. Figure 5.1 SLWSTK6120A

Power Switch on page 9 shows how the different power sources can be selected with the slide switch.

3.3V

VMCU

AEM

USB

BAT

USB Mini-B

Connector

Advanced

Energy

Monitor

WGM110

BAT

USB

AEM

LDO

WSTK power select

slide switch

WGM110 Radio Board

USB Micro-B

Connector

DC/DC

Converter

Transistor

Switch

3.3V

USB 3.3V Enable

VBUS

CR2032

coin cell

(not supported for WGM110)

Figure 5.1 SLWSTK6120A Power Switch

With the switch in the AEM position, a low noise 3.3 V LDO on the WSTK Mainboard is used to power the Radio Board. This LDO is

again powered from the Debug USB cable.

With the WGM110 radio board, the USB position of the power switch is disconnected. Instead, a transistor switch on the radio board

itself connects the on-board regulator to the module power supply when the target USB cable is inserted. Please note that this happens

regardless of the power switch position, so the power switch should be set to USB or BAT when using the radio board USB connector

to avoid conflict. The transistor switch allows the radio board to be powered by a USB cable even when removed from the WSTK main-

board.

With the switch in the BAT position, the WGM110 Module is powered by 2 x AA sized batteries. This requires that the external battery

holder with 2 x AA batteries is connected to the Expansion Header (after removing the Expansion Board).

The BAT switch position is the recommended position when powering the Radio Board with an external power source, as it disconnects

the internal LDO.

Note: Please be aware that the current sourcing capabilities of a coin cell battery is too low in practical cases to supply Wi-Fi based

wireless applications.

Note: The Advanced Energy Monitor functionality is not supported when using the BRD4320A Radio Board with WSTK.

UG172: Wizard Gecko Wi-Fi® Module Wireless Starter Kit SLWSTK6120A User's Guide

Power Supply and Reset

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