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
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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
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
IN
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
GND
5V
5V
P25
P24
P27
P26
P29
P28
P31
P30
P33
P32
P35
P34
P37
P36
P39
P38
P41
P40
P43
P42
P45
P44
GND
GND
NC
NC
Radio Board
Connectors
Expansion
Header
GND
GND
VMCU
VMCU
P1
P0
P3
P2
P5
P4
P7
P6
P9
P8
P11
P10
P13
P12
P15
P14
P17
P16
P19
P18
P21
P20
GND
GND
P23
P22
VRF
VRF
3V3
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
GND
5V
5V
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
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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.
12
4
8
6
10
3
5
9
7
12
13
14
11
1516
17
18
20 19
VMCU
PD0
PD1
PD2
PD3
PD4
PD5
PE0
5V
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
GPIO
GPIO
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
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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
4
8
6
10
3
5
9
12
13 14
11
15 16
17 18
20
19
TMS / SWDIO / C2D
TCK / SWCLK / C2CK
TDO / SWO
TDI / C2Dps
TRACECLK
TRACED0
TRACED1
TRACED2
TRACED3
RESET / C2CKps
Vdevice
GND
NC
Cable Detect
NC
NC
GND
GND
GND
7
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
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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
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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
5
5V
15
GND
13
GND
11
GND
9
GND
7
GND
17
Board ID SCL
19
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
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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
5V
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
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