Silicon Laboratories Wizard Gecko WGM110 Wi-Fi Wireless Starter... User manual

UG172: WGM110 Wi-Fi Module
Wireless Starter Kit User's Guide
A Silicon Labs Wireless Starter Kit for the WGM110 Wizard Gecko
Wi-Fi® Module is an excellent starting point to get familiar with the
device, and it provides all necessary tools for developing a Silicon
Labs wireless application.
The Wireless Starter Kit Mainboard contains sensors and peripherals enabling easy
demonstration of some of the WGM110's many capabilities. An on-board J-Link debug-
ger allows debugging of the attached radio board as well as providing a debug connec-
tion for external hardware.
A plug-in Radio Board contains the reference design for the WGM110 itself, including the
RF section and device-specific hardware.
WSTK MAINBOARD FEATURES
• Ethernet and USB connectivity
• SEGGER J-Link on-board debugger
• Supports debugging the attached radio
board or an external device
• Silicon Labs' Si7021 Relative Humidity and
Temperature sensor
• Ultra low power 128x128 pixel Memory
LCD
• User LEDs / Pushbuttons
• 20-pin 2.54 mm header for expansion
boards
• Breakout pads for direct access to radio
board I/O pins
• Power sources include USB and CR2032
coin cell.
BRD4320A RADIO BOARD FEATURES
• WGM110 Wizard Gecko Wi-Fi Module with
1 MB Flash and 128 kB RAM, with on-
board chip antenna, RF match.
• USB Micro-B connector offers device mode
support.
• MicroSD card slot.
EXPANSION BOARD FEATURES
• Accelerometer
• Buttons and LEDs
• Joystick
SOFTWARE SUPPORT
• Wizard Gecko Wi-Fi Software
• Wizard Gecko Wi-Fi SDK
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1. Introduction
The WGM110 Wizard Gecko Wi-Fi Module itself is featured on a Radio Board that forms a complete reference design, inluding the RF
section and other components.
The WGM110 Radio Board plugs directly into a Wireless Starter Kit Mainboard. The WSTK Mainboard features several tools for easy
evaluation and development of wireless applications. An on-board J-Link debugger enables programming and debugging on the target
device over USB or Ethernet. The Advanced Energy Monitor (AEM) offers real-time current and voltage monitoring. A virtual COM port
interface (VCOM) provides an easy-to-use serial port connection over USB or Ethernet. The Packet Trace Interface (PTI) offers invalua-
ble debug information about transmitted and received packets in wireless links.
All debug functionality, including AEM, VCOM and PTI, can also be used towards external target hardware instead of the attached radio
board.
To further enhance its usability, the WSTK Mainboard contains sensors and peripherals demonstrating some of the WGM110's many
capabilities.
The Wireless Starter Kit for WGM110 includes an add-on board (BRD8006A) that can be connected to the WSTK Mainboard expansion
header. The expansion board contains additional peripherals such as an accelerometer, buttons, LEDs, joystick and a footprint for an
I2C authentication device. To support software development 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.
1.1 Radio Boards
A Wireless Starter Kit consists of one or more mainboards and radio boards that plug into the mainboard. Different radio boards are
available. Each featuring different Silicon Labs devices with different operating frequency bands.
Since the mainboard is designed to work with all different radio boards, the actual pin mapping from a device pin to a mainboard feature
is done on the radio board. This means that each radio board has its own pin mapping to the Wireless Starter Kit features such as
buttons, LEDs, the display, the EXP header and the breakout pads. Because this pin mapping is different for every radio board, it is
important that the correct document be consulted which shows the kit features in context of the radio board plugged in.
This document explains how to use the Wireless Starter Kit when the WGM110 Wi-Fi Module Radio Board (BRD4320A) is combined
with a Wireless STK Mainboard. The combination of these two boards is hereby referred to as a Wireless Starter Kit (Wireless STK).
1.2 Ordering Information
BRD4320A can be obtained as part of SLWSTK6120A Wi-Fi Module Wireless Starter Kit or as a separate radio board, SLWRB4320A.
Table 1.1. Ordering Information
Part Number Description Contents Notes
SLWSTK6120A Wi-Fi Module Wireless Starter Kit 1x BRD4001A Wireless Starter Kit Mainboard
1x BRD4320A WGM110 Wi-Fi Module Radio Board
1x BRD8006A Blue Gecko Module Kit Add-on Board
1x AA Battery Holder
1x USB Type A <-> USB Mini-B cable
1x USB Type A <-> USB Micro-B cable
Obsoleted
SLWRB4300A WGM110 Wi-Fi Module Radio Board 1x BRD4320A WGM110 Wi-Fi Module Radio Board
1.3 Getting Started
Detailed instructions for how to get started can be found on the Silicon Labs web pages:
http://www.silabs.com/start-wgm
UG172: WGM110 Wi-Fi Module Wireless Starter Kit User's Guide
Introduction
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2. Kit Hardware Overview
The layout of the WGM110 Wi-Fi Module Wireless Starter Kit is shown in the figure 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. Kit Hardware Overview
UG172: WGM110 Wi-Fi Module Wireless Starter Kit User's Guide
Kit Hardware Overview
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3. Kit Block Diagram
An overview of the WGM110 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
USB
Debug
USB Mini-B
Connector
UART
RJ-45 Ethernet
Connector
AEM
Multiplexer
Debug
UART
ETM Trace
Packet Trace
AEM
Debug
UART
Packet Trace
AEM
Simplicity
Connector
Debug
Connector
Board
Controller
OUT
IN
MCU
WGM110
WiFi Module
Figure 3.1. Kit Block Diagram
UG172: WGM110 Wi-Fi Module Wireless Starter Kit User's Guide
Kit Block Diagram
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4. Connectors
This chapter gives you an overview of the Wireless STK 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. Mainboard 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 STK Main-
board. 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 maps 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
GNDGND
5V5V
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 plugin 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 IO. 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 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
SPI_MOSI / PD0
SPI_MISO / PD1
SPI_SCK / PD2
SPI_CS / PD3
GPIO / PD4
GPIO / PD5
I2C_SDA / PE0
5V
3V3
GND
PB11 / GPIO
PB12 / GPIO
PE14 / GPIO
PE15 / GPIO
PE12 / (VCOM_CTS)
PE13 / (VCOM_RTS)
PE1 / I2C_SCL
Board ID SDA
Board ID SCL
Reserved (Board Identification)
WGM110 I/O Pin
Figure 4.3. Expansion Header
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4.2.1 Expansion Header Pin-out
Many pins on the WGM110 are shared between the Expansion Header and other functions on the Wireless STK Mainboard. Table
4.1 Expansion Header Pinout on page 6 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
20 3V3 Board controller supply
18 5V Board USB voltage
16 PE0 I2C_SDA SENSOR_I2C_SDA I2C1_SDA #2
14 PD5 GPIO
12 PD4 GPIO
10 PD3 SPI_CS USART1_CS #1
8 PD2 SPI_CLK SD_CLK / DISP_SCLK USART1_CLK #1
6 PD1 SPI_MISO SD_MISO USART1_RX #1
4 PD0 SPI_MOSI SD_MOSI / DISP_SI USART1_TX #1
2 VMCU WGM110 voltage domain, included in AEM measurements.
19 BOARD_ID_SDA Connected to Board Controller for identification of add-on boards.
17 BOARD_ID_SCL Connected to Board Controller for identification of add-on boards.
15 PE1 I2C_SCL SENSOR_I2C_SCL I2C1_SCL #2
13 PE13 GPIO VCOM_RTS
11 PE12 GPIO VCOM_CTS
9 PE15 GPIO
7 PE14 GPIO
5 PB12 GPIO
3 PB11 GPIO
1 GND Ground
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4.3 Debug Connector
The Debug Connector serves multiple purposes based on the "debug mode" setting which can be configured in Simplicity Studio. When
the debug mode is set to "Debug IN", the debug connector can be used to connect an external debugger to the WGM110 on the radio
board. When set to "Debug OUT", this connector allows the kit to be used as a debugger towards an external target. When set to "De-
bug MCU" (default), the connector is isolated from both the on-board debugger and the radio board target device.
Because this connector is electronically switched between the different operating modes, it can only be used when the Board Controller
is powered (i.e. J-Link USB cable connected). If debug access to the target device is required when the Board Controller is unpowered,
connect 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. Even though the connector has support for both JTAG and ETM Trace, it does not necessarily mean that the kit or the on-board
target device supports this.
1 2
4
8
6
10
3
5
9
12
13 14
11
15 16
17 18
2019
TMS / SWDIO / C2D
TCK / SWCLK / C2CK
TDO / SWO
TDI / C2Dps
TRACECLK
TRACED0
TRACED1
TRACED2
TRACED3
RESET / C2CKps
GND
NC
NC
GND
GND
GND
7
GND
VTARGET
Cable Detect
NC
Figure 4.4. Debug Connector
Note: The pinout matches the pinout of an ARM Cortex Debug+ETM connector, but these are not fully compatible as pin 7 is physically
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 Description
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
14 TRACED0
16 TRACED1
18 TRACED2
20 TRACED3
9 Cable detect Connect to ground
11, 13 NC Not connected
3, 5, 15, 17, 19 GND Ground
Note: The Wireless STK Mainboard does not support this feature when used together with the Wizard Gecko WGM110 Module; howev-
er, BGTool can be used to debug BGAPI commands and error situations. For more information on BGTool go to Silicon Labs web page
http://www.silabs.com/start-wgm and download UG160: Wizard Gecko BGTool™ User's Guide.
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Connectors
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4.4 Simplicity Connector
The Simplicity Connector enables the advanced debugging features, such as the AEM, the Virtual COM port and the Packet Trace In-
terface, 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
6Virtual 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
Note: 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 Radio Board from the Wireless STK Mainboard to avoid
that the Radio Board current consumption is added to the measurements.
Table 4.3. Simplicity Connector Pin Descriptions
Pin number(s) Function Description
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 Ground
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5. Power Supply and Reset
5.1 Radio Board Power Selection
The WGM110 on a Wireless Starter Kit can be powered by one of these sources:
• the debug USB cable;
• a 3V coin cell battery; or
• a USB regulator on the Radio Board (for devices with USB support only).
The power source for the radio board is selected with the slide switch in the lower left corner of the Wireless STK Mainboard. 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. 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. The Advanced Energy Monitor is now also connected in series, allowing accurate high
speed current measurements and energy debugging/profiling.
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: The current sourcing capabilities of a coin cell battery is too low to supply normal operation of Wi-Fi based wireless applications.
Note: The Advanced Energy Monitor functionality is not supported when using the BRD4320A Radio Board with the Wireless STK
Mainboard.
UG172: WGM110 Wi-Fi Module Wireless Starter Kit User's Guide
Power Supply and Reset
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