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UG194: EZR32 Happy Gecko 169 MHz
Wireless Starter Kit
The SLWSTK6244A is an excellent starting point to get familiar
with the EZR32™ Happy Gecko Wireless Microcontroller.
The Wireless Starter Kit Mainboard contains sensors and peripherals demonstrating
some of the EZR32 Happy Gecko's many capabilities. The kit provides all necessary
tools for developing a Silicon Labs wireless application.
KIT FEATURES
• Ethernet and USB connectivity
• Advanced Energy Monitor
• Packet Trace Interface support
• 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
• User LEDs / Pushbuttons
• 20-pin 2.54 mm header for expansion
boards
• Breakout pads for direct access to all radio
I/O pins
• Power sources includes USB and CR2032
coin cell holder.
RADIO BOARD FEATURES
• EZR32 Happy Gecko Wireless MCU with
64 kB Flash and 8 kB RAM.
(EZR32HG320F64R63G)
• SMA connector for RF
• USB Micro-B connector
SOFTWARE SUPPORT
• Simplicity Studio™
• Energy Profiler
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UG194: EZR32 Happy Gecko 169 MHz Wireless Starter Kit
Introduction
1. Introduction
The SLWSTK6244A Wireless Starter Kit provides a complete development platform for Silicon Labs EZR32 Happy Gecko Wireless Microcontrollers.
The core of the SLWSTK6244A is the Wireless Starter Kit Mainboard which features an on-board J-Link debugger, an Advanced Energy Monitor (AEM) for real-time current and voltage monitoring, a Virtual COM port interface (VCOM), and access to the Packet Trace
Interface (PTI).
The WSTK Mainboard is paired with an EZR32HG 169 MHz 20 dBm radio board that plugs directly into the mainboard. The radio board
features the EZR32 itself and the RF interface. Please refer to the Reference Manual for the included radio boards for detailed specifications and RF performance figures.
All debug functionality, including AEM, VCOM and PTI, can also be used towards an external target instead of the included radio board.
To further enhance the WSTK usability, the WSTK Mainboard contains sensors and peripherals demonstrating some of the Wireless
MCU's many capabilities.
1.1 Kit Contents
The following items are included in the box:
• 2x BRD4001A Wireless Starter Kit Mainboards
• 2x BRD4544A EZR32HG 169 MHz 20 dBm Radio Boards
• 2x 169 MHz antennas with SMA connector
• 2x CR2032 Lithium batteries
• 2x USB Type A <-> USB Mini-B cables
• 2x USB Type A <-> USB Micro-B cables
• 1x BRD8010A WSTK Debug Adapter
1.2 Getting Started
Detailed instructions for how to get started can be found on the Silicon Labs web pages:
http://www.silabs.com/simplicity
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UG194: EZR32 Happy Gecko 169 MHz Wireless Starter Kit
Kit Hardware Layout
2. Kit Hardware Layout
The layout of the EZR32 Happy Gecko 169 MHz Wireless Starter Kit is shown below.
Radio Board Breakout Pads
Plug-in Radio Board
Si7021 Humidity and
Temperature Sensor
On-board USB and
Ethernet J-Link
Debugger
EXP-header for
expansion boards
USB-serial-port
Packet-trace
Advanced Energy
Monitoring
Battery or
USB power
USB Micro-B connector
for EZR32
Ultra-low power 128x128
pixel memory LCD,
buttons and LEDs
ARM Coresight 19-pin
trace/debug header
Serial-port, packet trace and Advanced
Energy Monitoring header
Figure 2.1. SLWSTK6244A Hardware Layout
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UG194: EZR32 Happy Gecko 169 MHz Wireless Starter Kit
Kit Block Diagram
3. Kit Block Diagram
An overview of the EZR32 Happy Gecko 169 MHz Wireless Starter Kit is shown in the figure below.
Board
Controller
UART
Simplicity
Connector
USB Mini-B
Connector
Debug
Packet Trace
AEM
UART
RJ-45 Ethernet
Connector
Multiplexer
Packet Trace
IN
Debug
Debug
Connector
MCU
O
U
T
AEM
EXP
Header
ETM Trace
Debug
Packet Trace
GPIO
128 x 128 pixel
Memory LCD
GPIO
EZR32HG
Wireless MCU
Si7021
I2C
Temperature
& Humidity
Sensor
RF
User Buttons
& LEDs
AEM
UART
ETM Trace
SMA
Connector
USB Micro-B
Connector
Figure 3.1. Kit Block Diagram
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UG194: EZR32 Happy Gecko 169 MHz Wireless Starter Kit
Connectors
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.
3
3V V 3
3
D
N D
G GN
C
N NC
5 4
P4 P4
3 2
P4 P4
1 0
P4 P4
9 8
P3 P3
7 6
P3 P3
5 4
P3 P3
3 2
P3 P3
1 0
P3 P3
9 8
P2 P2
7 6
P2 P2
5 4
P2 P2
D
N D
G G N 5V
5V
Ra
Co dio B
nn
ec oard
tor
s
Ex
He pans
ad
i
er on
Simplicity
Connector
In/Out Debug
Header
F F
VR R
V
D
N D
G GN
3 2
P2 P2
1 0
P2 P2
9 8
P1 P1
7 6
P1 P1
5 4
P1 P1
3 2
P1 P1
1 0
P1 P1
P9 P8
P7 P6
P5 P4
P3 P2
P1 P0
D
N D
G GN
U
C U
VM MC
V
Figure 4.1. Mainboard Connector Layout
4.1 Breakout Pads
Most of the EZR32'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 EZR32 maps to the pin numbers printed on the breakout pads. To see the available functions on each, please refer to the
EZR32HG320F64R63G Data Sheet.
J101
VMCU
GND
LED1 / PF2 / EXP3 / P0
LED0 / PF4 / EXP5 / P2
BTN0 / PC9 / EXP7 / P4
BTN1 / PC10 / EXP9 / P6
PB11 / EXP11 / P8
NC / EXP13 / P10
I2C_SCL / PD7 / EXP15 / P12
DISP_CS / PA0 / P14
NC / P16
NC / P18
DBG_TCK_SWCLK / PF0 / P20
DISP_EXTCOMIN / PF3 / P22
GND
VRF
J102
VMCU
GND
P1 / EXP4 / PE10 / DISP_SI
P3 / EXP6 / PE11
P5 / EXP8 / PE12 / DISP_SCLK
P7 / EXP10 / PE13
P9 / EXP12 / PD4 / VCOM_TX
P11 / EXP14 / PD5 / VCOM_RX
P13 / EXP16 / PD6 / I2C_SDA
P15 / PA1 / DISP_ENABLE
P17 / NC
P19 / PC8 / VCOM_ENABLE
P21 / DBG_TMS_SWDIO / PF1
P23 / NC
GND
VRF
5V
GND
NC / P24
NC / P26
NC / P28
PTI_DATA / RF_GPIO0 / P30
RF_GPIO2 / P32
NC / P34
NC / P36
NC / P38
NC / P40
NC / P42
NC / P44
NC
GND
3V3
5V
GND
P25 / NC
P27 / NC
P29 / NC
P31 / RF_GPIO1 / PTI_FRAME
P33 / RF_GPIO3
P35 / NC
P37 / Tied High / SENSOR_ENABLE
P39 / NC
P41 / NC
P43 / NC
P45 / NC
NC
GND
3V3
Figure 4.2. Radio Board Pin Mapping on Breakout Pads
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UG194: EZR32 Happy Gecko 169 MHz Wireless Starter Kit
Connectors
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 EZR32 Happy 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 EZR32 Happy Gecko 169 MHz Wireless Starter Kit. Because of limitations in the number of available GPIO pins, some of the expansion header pins are shared with kit features.
3V3
5V
I2C_SDA / PD6
UART_RX / PD5
UART_TX / PD4
SPI_CS / PE13
SPI_CLK / PE12
SPI_MISO / PE11
SPI_MOSI / PE10
VMCU
20
18
16
14
12
10
8
6
4
2
19
17
15
13
11
9
7
5
3
1
Board ID SDA
Board ID SCL
PD7 / I2C_SCL
NC
PB11 / GPIO
PC10 / GPIO
PC9 / GPIO
PF4 / GPIO
PF2 / GPIO
GND
EZR32HG I/O Pin
Reserved (Board Identification)
Figure 4.3. Expansion Header
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UG194: EZR32 Happy Gecko 169 MHz Wireless Starter Kit
Connectors
4.2.1 Expansion header
Many pins on the EZR32HG 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
PD6
I2C_SDA
SENSOR_I2C_SDA
I2C0_SDA #1
14
PD5
UART_RX
VCOM_RX_MISO
LEUART0_RX #0
12
PD4
UART_TX
VCOM_TX_MOSI
LEUART0_TX #0
10
PE13
SPI_CS
8
PE12
SPI_SCLK
6
PE11
SPI_MISO
4
PE10
SPI_MOSI
2
VMCU
EZR32 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
PD7
I2C_SCL
13
Not connected
11
PB11
GPIO
9
PC10
GPIO
BTN1
7
PC9
GPIO
BTN0
5
PF4
GPIO
LED0
3
PF2
GPIO
LED0
1
GND
Ground
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USART0_CS #0
DISP_SCLK
USART0_CLK #0
USART0_RX #0
DISP_MOSI
SENSOR_I2C_SCL
USART0_TX #0
I2C0_SCL #1
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UG194: EZR32 Happy Gecko 169 MHz Wireless Starter Kit
Connectors
4.3 Debug Connector
The Debug Connector serves multiple purposes based on the "debug mode" setting which can be configured in Simplicity Studio. When
mode is set to "Debug IN", this connector allows an external debug emulator to be used with the radio board EZR32. When set to "Debug OUT", this connector allows the kit to be used as a debugger towards an external target. When set to "Debug MCU" (default), this
connector is isolated from the debug interface of both the Board Controller and the on-board target device.
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. 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.
VTARGET
GND
GND
NC
Cable Detect
NC
NC
GND
GND
GND
1
5
7
9
11
13
15
17
19
3
2
4
6
8
10
12
14
16
18
20
TMS / SWDIO / C2D
TCK / SWCLK / C2CK
TDO / SWO
TDI / C2Dps
RESET / C2CKps
TRACECLK
TRACED0
TRACED1
TRACED2
TRACED3
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
Not connected
14
TRACED0
Not connected
16
TRACED1
Not connected
18
TRACED2
Not connected
20
TRACED3
Not connected
9
Cable detect
Connect to ground
11, 13
NC
Not connected
3, 5, 15, 17, 19
GND
Ground
Note: Although the on-board debugger and the Debug Connector supports JTAG, the EZR32HG-series of devices do not support
JTAG.
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UG194: EZR32 Happy Gecko 169 MHz Wireless Starter Kit
Connectors
4.4 Simplicity Connector
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
3V3
5V
GND
GND
GND
GND
GND
Board ID SCL
Board ID SDA
1
3
5
7
9
11
13
15
17
19
2 Virtual COM TX / MOSI
4 Virtual COM RX / MISO
6
8
10
12
14
16
18
20
Virtual COM CTS / SCLK
Virtual COM RTS / CS
Packet Trace 0 Sync
Packet Trace 0 Data
Packet Trace 0 Clock
Packet Trace 1 Sync
Packet Trace 1 Data
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 WSTK Radio Board from the WSTK 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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UG194: EZR32 Happy Gecko 169 MHz Wireless Starter Kit
Connectors
4.5 Debug Adapter
Included with the kit is one BRD8010A STK/WSTK Debug Adapter Board. This board is an adapter which plugs directly into the Debug
Connector and the Simplicity Connector on the mainboard and combines selected functionality from these two to a smaller footprint 10pin connector which is more suitable for space constrained designs.
For versatility, the Debug Adapter feature three different 10-pin debug connectors:
• Silicon Labs Mini Simplicity Connector
• ARM Cortex 10-pin Debug Connector
• Silicon Labs ISA3 Packet Trace
The ARM Cortex 10-pin Debug Connector follows the standard Cortex pin-out defined by ARM and allows the Starter Kit to be used to
debug hardware designs that use this connector.
The ISA3 connector follows the same pin-out as the Packet Trace connector found on the Silicon Labs Ember Debug Adapter (ISA3).
This allows the Starter Kit to be used to debug hardware designs that use this connector.
The Mini Simplicity Connector is designed to offer advanced debug features from the Starter Kit on a 10-pin connector:
• Serial Wire Debug (SWD) with SWO
• Packet Trace Interface (PTI)
• Virtual COM Port (VCOM)
• AEM Monitored voltage rail
Note: Packet Trace is only available on Wireless STK Mainboards. MCU Starter Kits do not support Packet Trace.
VAEM
RST
VCOM_TX
SWDIO
PTI_FRAME
1
3
5
7
9
2
4
6
8
10
GND
VCOM_RX
SWO
SWCLK
PTI_DATA
Figure 4.6. Mini Simplicity Connector
Table 4.4. Mini Simplicity Connector Pin Descriptions
Pin number
Function
Description
1
VAEM
Target voltage on the debugged application. Supplied and monitored by the AEM
when power selection switch is in the "AEM" position.
2
GND
3
RST
Reset
4
VCOM_RX
Virtual COM Rx
5
VCOM_TX
Virtual COM Tx
6
SWO
Serial Wire Output
7
SWDIO
Serial Wire Data
8
SWCLK
Serial Wire Clock
9
PTI_FRAME
Packet Trace Frame Signal
10
PTI_DATA
Packet Trace Data Signal
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UG194: EZR32 Happy Gecko 169 MHz Wireless Starter Kit
Power Supply and Reset
5. Power Supply and Reset
5.1 Radio Board Power Selection
The EZR32 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).
B
AT
U
SB
AE
M
The power source for the radio board is selected with the slide switch in the lower left corner of the Wireless STK Mainboard. Figure
5.1 Power Switch on page 10 shows how the different power sources can be selected with the slide switch.
5V
USB Mini-B
Connector
LDO
3.3 V
Advanced
Energy
Monitor
AEM
VMCU
USB
BAT
3 V Lithium Battery
(CR2032)
USB_VREGO
. V)
(3.3
EZR32HG
USB_VREGI
(5 V)
USB Micro-B
Connector
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 switch in the USB position, the integrated linear regulator in the EZR32 is used to power the radio board. This allows a USB
device application where the Wireless MCU operates as a bus powered device.
Finally, with the switch in the BAT position, a 20 mm coin cell battery in the CR2032 socket can be used to power the device. With the
switch in this position no current measurements are active. This is the recommended switch position when powering the radio board
with an external power source.
Note: The current sourcing capabilities of a coin cell battery might be too low to supply certain wireless applications.
Note: The Advanced Energy Monitor can only measure the current consumption of the EZR32 when the power selection switch is in
the AEM position.
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UG194: EZR32 Happy Gecko 169 MHz Wireless Starter Kit
Power Supply and Reset
5.2 Board Controller Power
The board controller is responsible for important features such as the debugger and the Advanced Energy Monitor, and is powered
exclusively through the USB port in the top left corner of the board. This part of the kit resides on a separate power domain, so a different power source can be selected for the target device while retaining debugging functionality. This power domain is also isolated to
prevent current leakage from the target power domain when power to the Board Controller is removed.
The board controller power domain is exclusively supplied by the J-Link USB cable, and is not influenced by the position of the power
switch.
The kit has been carefully designed to keep the board controller and the target power domains isolated from each other as one of them
powers down. This ensures that the target EZR32 device will continue to operate in the USB and BAT modes.
5.3 EZR32 Reset
The EZR32 Wireless MCU can be reset by a few different sources:
• A user pressing the RESET button.
• The on-board debugger pulling the #RESET pin low.
• An external debugger pulling the #RESET pin low.
In addition to the reset sources mentioned above, the Board Controller will also issue a reset to the EZR32 when booting up. This
means that removing power to the Board Controller (plugging out the J-Link USB cable) will not generate a reset, but plugging the cable
back in will, as the Board Controller boots up.
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UG194: EZR32 Happy Gecko 169 MHz Wireless Starter Kit
Peripherals
6. Peripherals
The starter kit has a set of peripherals that showcase some of the features of the EZR32.
Be aware that most EZR32 I/O routed to peripherals are also routed to the breakout pads. This must be taken into consideration when
using the breakout pads for your application.
6.1 Push Buttons and LEDs
The kit has two user push buttons marked PB0 and PB1. They are connected directly to the EZR32, and are debounced by RC filters
with a time constant of 1 ms. The buttons are connected to pins PC9 and PC10.
The kit also features two yellow LEDs marked LED0 and LED1, that are controlled by GPIO pins on the EZR32. The LEDs are connected to pins PF4 and PF2 in an active-high configuration.
PF4 (GPIO)
UIF_LED0
PF2 (GPIO)
UIF_LED1
PC9 (GPIO)
UIF_PB0
PC10 (GPIO)
UIF_PB1
User Buttons
& LEDs
EZR32HG
Figure 6.1. Buttons and LEDs
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UG194: EZR32 Happy Gecko 169 MHz Wireless Starter Kit
Peripherals
6.2 Memory LCD-TFT Display
A 1.28-inch SHARP Memory LCD-TFT is available on the kit to enable interactive applications to be developed. The display has a high
resolution of 128 by 128 pixels, and consumes very little power. It is a reflective monochrome display, so each pixel can only be light or
dark, and no backlight is needed in normal daylight conditions. Data sent to the display is stored in the pixels on the glass, which means
no continous refreshing is required to maintain a static image.
The display interface consists of an SPI-compatible serial interface and some extra control signals. Pixels are not individually addressable, instead data is sent to the display one line (128 bits) at a time.
The Memory LCD-TFT display is shared with the kit Board Controller, allowing the Board Controller application to display useful information when the user application is not using the display. The user application always controls ownership of the display with the
DISP_ENABLE signal:
• DISP_ENABLE = LOW: The Board Controller has control of the display
• DISP_ENABLE = HIGH: The user application (EZR32) has control of the display
Power to the display is sourced from the target application power domain when the EZR32 controls the display, and from the Board
Controller's power domain when the DISP_ENABLE line is low. Data is clocked in on DISP_SI when DISP_CS is high, and the clock is
sent on DISP_SCLK. The maximum supported clock speed is 1.1 MHz.
DISP_COM is the "COM Inversion" line. It must be pulsed periodically to prevent static build-up in the display itself. Please refer to the
display application information for details on driving the display:
http://www.sharpmemorylcd.com/1-28-inch-memory-lcd.html
PE12 (US0_CLK#0)
PE10 (US0_TX#0)
PA0 (GPIO)
PF3 (GPIO)
PA1 (GPIO)
0: Board Controller controls display
1: EZR32HG controls display
EZR32HG
Figure 6.2. 128x128 Pixel Memory LCD
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UG194: EZR32 Happy Gecko 169 MHz Wireless Starter Kit
Peripherals
6.3 Si7021 Relative Humidity and Temperature Sensor
The Si7021 I2C relative humidity and temperature sensor is a monolithic CMOS IC integrating humidity and temperature sensor elements, an analog-to-digital converter, signal processing, calibration data, and an I2C Interface. The patented use of industry-standard,
low-K polymeric dielectrics for sensing humidity enables the construction of low-power, monolithic CMOS Sensor ICs with low drift and
hysteresis, and excellent long term stability.
The humidity and temperature sensors are factory-calibrated and the calibration data is stored in the on-chip non-volatile memory. This
ensures that the sensors are fully interchangeable, with no recalibration or software changes required.
The Si7021 is available in a 3x3 mm DFN package and is reflow solderable. It can be used as a hardware- and software-compatible
drop-in upgrade for existing RH/ temperature sensors in 3x3 mm DFN-6 packages, featuring precision sensing over a wider range and
lower power consumption. The optional factory-installed cover offers a low profile, convenient means of protecting the sensor during
assembly (e.g., reflow soldering) and throughout the life of the product, excluding liquids (hydrophobic/oleophobic) and particulates.
The Si7021 offers an accurate, low-power, factory-calibrated digital solution ideal for measuring humidity, dew-point, and temperature,
in applications ranging from HVAC/R and asset tracking to industrial and consumer platforms.
The I2C bus used for the Si7021 is shared with the Expansion Header. The temperature sensor is normally isolated from the I2C line. To
use the sensor, SENSOR_ENABLE (tied high) must be set high. When enabled, the sensor's current consumption is included in the
AEM measurements.
VMCU
VDD
PD7 (I2C0_SCL#1)
PD6 (I2C0_SDA#1)
ON (tied high)
SENSOR_I2C_SCL
SCL
SENSOR_I2C_SDA
SDA
Si7021
Temperature
& Humidity
Sensor
SENSOR_ENABLE
0: I2C lines are isolated, sensor is not powered
1: Sensor is powered and connected
EZR32HG
Figure 6.3. Si7021 Relative Humidity and Temperature Sensor
Please refer to the Silicon Labs web pages for more information: http://www.silabs.com/humidity-sensors
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UG194: EZR32 Happy Gecko 169 MHz Wireless Starter Kit
Peripherals
6.4 USB Micro-B Connector
The BRD4544A radio board is equipped with a USB Micro-B connector that is connected directly to the EZR32 Happy Gecko. Figure
6.4 Radio Board USB Connector on page 15 shows how the USB lines are connected to the EZR32.
D-
USB_DM (PC14)
D+
USB_DP (PC15)
VBUS
USB_VBUS
USB
USBMicro-B
micro B
Connector
Connector
USB_VREGI
USB_VREGO
EZR32HG
1 uF
4.7 uF
Figure 6.4. Radio Board USB Connector
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UG194: EZR32 Happy Gecko 169 MHz Wireless Starter Kit
Peripherals
6.5 Virtual COM Port
An asynchronous serial connection to the board controller is provided for application data transfer between a host PC and the target
EZR32. This eliminates the need for an external serial port adapter.
Isolation & Level Shift
PD4 (LEUART0_TX#0)
PD5 (LEUART0_RX#0)
VCOM_TX
VCOM_RX
VCOM_CTS
NC
Board
Controller
USB
or
ETH
Host
PC
VCOM_RTS
NC
PC8 (GPIO)
VCOM_ENABLE
EZR32HG
Figure 6.5. Virtual COM Port Interface
The Virtual COM port consists of a physical UART between the target device and the board controller, and a logical function in the
board controller that makes the serial port available to the host PC over USB or Ethernet. The UART interface consists of four pins and
an enable signal.
Table 6.1. Virtual COM Port Interface Pins
Signal
Description
VCOM_TX
Transmit data from the EZR32 to the board controller
VCOM_RX
Receive data from the board controller to the EZR32
VCOM_CTS
Clear to Send hardware flow control input, asserted by the board controller when it is ready to receive more data
VCOM_RTS
Request to Send hardware flow control output, asserted by the EZR32 when it is ready to receive more data
VCOM_ENABLE Enables the VCOM interface, allowing data to pass through to the board controller.
The parameters of the serial port, such as baud rate or flow control, can be configured using the admin console. The default settings
depends on which radio board is used with the Wireless Starter Kit Mainboard. Please see 10. Device Connectivity for more details.
Note: The VCOM port is only available when the board controller is powered, which requires the J-Link USB cable to be inserted.
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UG194: EZR32 Happy Gecko 169 MHz Wireless Starter Kit
Board Controller
7. Board Controller
The Wireless Starter Kit Mainboard contains a microcontroller separate from the EZR32 Happy Gecko that is responsible for some of
the advanced kit features provided. This microcontroller is referred to as the "Board Controller", and is not programmable by the user.
The board controller acts as an interface between the host PC and the target device on the radio board, as well as handling some
house-keeping functions on the board.
Some of the kit features actively managed by the board controller are:
•
•
•
•
The On-board Debugger, which can flash and debug both on-board and external targets.
The Advanced Energy Monitor, which provides real-time energy profiling of the user application.
The Packet Trace Interface , which is used in conjunction with PC software to provide detailed insight into an active radio network.
The Virtual COM Port and Virtual UART interfaces, which provide ways to transfer application data between the host PC and the
target processor.
• The Admin Console, which provides configuration of the various board features.
Silicon Labs publishes updates to the board controller firmware in form of firmware upgrade packages. These updates may enable new
features or fix issues. See 11.2 Firmware Upgrades for details on firmware upgrade.
7.1 Admin Console
The admin console is a command line interface to the board controller on the kit. It provides functionality for configuring the kit behavior
and retreiving configuration and operational parameters.
■
Connecting
The SLWSTK6244A must be connected to Ethernet using the Ethernet connector in the top left corner of the mainboard for the admin
console to be available. See ● Ethernet Interface for details on the Ethernet connectivity.
Connect to the Admin Console by opening a telnet connection to the kit's IP address, port number 4902.
When successfully connected, a WSTK> prompt is displayed.
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UG194: EZR32 Happy Gecko 169 MHz Wireless Starter Kit
Board Controller
■
Built-in Help
The admin console has a built in help system which is accessed by the help command. The help command will print a list of all top
level commands:
WSTK> help
*************** Root commands ****************
aem
AEM commands
[ calibrate, current, dump, ... ]
boardid
Commands for board ID probe.
[ list, probe ]
dbg
Debug interface status and control
[ info, mode,]
dch
Datachannel control and info commands
[ info ]
discovery
Discovery service commands.
net
Network commands.
[ dnslookup, geoprobe, ip ]
pti
Packet trace interface status and control
[ config, disable, dump, ... ]
quit
Exit from shell
sys
System commands
[ nickname, reset, scratch, ... ]
target
Target commands.
[ button, flashwrite, go, ... ]
time
Time Service commands
[ client, server ]
user
User management functions
[ login,]
The help command can be used in conjunction with any top level command to get a list of sub-commands with description. For example, pti help will print a list of all available sub-commands of pti:
WSTK> pti help
*************** pti commands ****************
config
Configure packet trace
disable
Disable packet trace
dump
Dump PTI packets to the console as they come
enable
Enable packet trace
info
Packet trace state information
This means that running pti enable will enable packet trace.
■
Command Examples
PTI Configuration
pti config 0 efruart 1600000
Configures PTI to use the "EFRUART" mode at 1.6 Mb/s.
Serial Port Configuration
serial config vcom handshake enable
Enables hardware handshake on the VCOM UART connection.
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UG194: EZR32 Happy Gecko 169 MHz Wireless Starter Kit
Advanced Energy Monitor
8. Advanced Energy Monitor
8.1 Introduction
Any embedded developer seeking to make his embedded code spend as little energy as the underlying architecture supports, needs
tools to easily and quickly discover inefficiencies in the running application.
This is what the Simplicity Energy Profiler is designed to do. It will in real-time graph and log current as a function of time while correlating this to the actual target application code running on the EZR32. There are multiple features in the profiler software that allows for
easy analysis, such as markers and statistics on selected regions of the current graph or aggregate energy usage by different parts of
the application.
8.2 Theory of Operation
The Advanced Energy Monitor (AEM) circuitry on the board is capable of measuring current signals in the range of 0.1 µA to 95 mA,
which is a dynamic range of alomst 120 dB. It can do this while maintaining approximately 10 kHz of current signal bandwidth. This is
accomplished through a combination of a highly capable current sense amplifier, multiple gain stages and signal processing within the
kit's board controller before the current sense signal is read by a host computer for display and/or storage.
The current sense amplifier measures the voltage drop over a small series resistor, and the gain stage further amplifies this voltage with
two different gain settings to obtain two current ranges. The transition between these two ranges occurs around 250 µA.
The current signal is combined with the target processor's Program Counter (PC) sampling by utilizing a feature of the ARM CoreSight
debug architecture. The ITM (Instrumentation Trace Macrocell) block can be programmed to sample the MCU's PC at periodic intervals
(50 kHz) and output these over SWO pin ARM devices. When these two data streams are fused and correlated with the running application's memory map, an accurate statistical profile can be built, that shows the energy profile of the running application in real-time.
At kit power-up or on a power-cycle, and automatic AEM calibration is performed. This calibration compensates for any offset errors in
the current sense amplifiers.
LDO
EZR32HG
Peripherals
AEM
Processing
Figure 8.1. Advanced Energy Monitor
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UG194: EZR32 Happy Gecko 169 MHz Wireless Starter Kit
Advanced Energy Monitor
8.3 AEM Accuracy and Performance
The AEM is capable of measuring currents in the range of 0.1 µA to 95 mA. For currents above 250 µA, the AEM is accurate within 0.1
mA. When measuring currents below 250 µA, the accuracy increases to 1 µA. Even though the absolute accuracy is 1 µA in the sub
250 µA range, the AEM is able to detect changes in the current consumption as small as 100 nA.
The AEM current sampling rate is 10 kHz.
Note: The AEM circuitry only works when the kit is powered and the power switch is in the AEM position.
8.4 Usage
The AEM data is collected by the board controller and can be displayed by the Energy Profiler, available through Simplicity Studio. By
using the Energy Profiler, current consumption and voltage can be measured and linked to the actual code running on the EZR32 in
realtime.
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UG194: EZR32 Happy Gecko 169 MHz Wireless Starter Kit
On-Board Debugger
9. On-Board Debugger
The SLWSTK6244A contains an integrated debugger, which can be used to download code and debug the EZR32. In addition to programming the EZR32 on the kit, the debugger can also be used to program and debug external Silicon Labs EFM32, EFM8, EZR32
and EFR32 devices.
The debugger supports three different debug interfaces used with Silicon Labs devices:
• Serial Wire Debug, is used with all EFM32, EFR32 and EZR32 devices
• JTAG, which can be used with some newer EFR32 and EFM32 devices
• C2 Debug, which is used with EFM8 devices
In order for debugging to work properly, make sure you have the approriate debug interface selected that works with your device. The
debug connector on the board supports all three of these modes.
9.1 Host Interfaces
The SLWSTK6244A supports connecting to the on-board debugger using either Ethernet or USB.
Many tools support connecting to a debugger using either USB or Ethernet. When connected over USB, the kit is identified by its J-Link
serial number. When connected over Ethernet, the kit is normally identified by its IP address. Some tools also support using the serial
number when connecting over Ethernet, this typically require the computer and the kit to be on the same subnet for the discovery protocol (using UDP broadcast packets) to work.
USB Interface
The USB interface is available whenever the mini-B USB connector on the left hand side of the kit is connected to a computer.
Ethernet Interface
The Ethernet interface is available when the kit's Ethernet connector in the top left corner is connected to a network. Normally, the kit
will receive an IP address from a local DHCP server, and the IP address is printed on the LCD display. If your network does not have a
DHCP server, you need to connect to the kit via USB and set the IP address manually using Simplicity Studio, Simplicity Commander or
J-Link Configurator.
For the Ethernet connectivity to work, the kit must still be powered through the mini-B USB connector. See 5.2 Board Controller Power
for details.
Serial Number Identification
All Silicon Labs kits have a unique J-Link serial number which can identifies the kit to PC applications. This number is 9 digits, and is
normally on the form 44xxxxxxx.
The J-Link serial number is normally printed at the bottom of the kit LCD display.
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UG194: EZR32 Happy Gecko 169 MHz Wireless Starter Kit
On-Board Debugger
9.2 Debug Modes
Programming external devices is done by connecting to a target board through the provided Debug IN/OUT Connector, and by setting
the debug mode to [Out]. The same connector can also be used to connect an external debugger to the EZR32 Wireless MCU on the
kit, by setting the debug mode to [In]. A summary of the different supported debug modes is given in 9.2 Debug Modes.
Selecting the active debug mode is done with a drop-down menu in the Kit Manager tool in Simplicity Studio.
Debug MCU: In this mode the on-board debugger is connected to the EZR32 on the SLWSTK6244A.
Host
Computer
USB
Board
Controller
RADIO BOARD
External
Hardware
DEBUG HEADER
Figure 9.1. Debug MCU
Debug OUT: In this mode, the on-board debugger can be used to debug a supported Silicon Labs device mounted on a custom board.
Host
Computer
USB
Board
Controller
RADIO BOARD
External
Hardware
DEBUG HEADER
Figure 9.2. Debug OUT
Debug IN: In this mode, the on-board debugger is disconnected, and an external debugger can be connected to debug the EZR32 on
the SLWSTK6244A.
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UG194: EZR32 Happy Gecko 169 MHz Wireless Starter Kit
On-Board Debugger
Host
Computer
USB
Board
Controller
RADIO BOARD
External Debug Probe
DEBUG HEADER
Figure 9.3. Debug IN
Note: For "Debug IN" to work, the board controller on the kit must be powered throught the USB connector.
9.3 Debugging During Battery Operation
When the EZR32 is powered by battery and the J-Link USB is still connected, the on-board debug functionality is available. If the USB
power is disconnected, the Debug In mode will stop working.
If debug access is required when the target is running of another energy source, such as a battery, and the board controller is powered
down, the user should make direct connections to the GPIO used for debugging. This can be done by connecting to the appropriate
pins of the breakout pads. Some Silicon Labs kits provide a dedicated pin header for this purpose.
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UG194: EZR32 Happy Gecko 169 MHz Wireless Starter Kit
Device Connectivity
10. Device Connectivity
The SLWSTK6244A provides several convenient ways to communicate with a target application without soldering or using external
hardware.
10.1 Virtual COM Port
When the target device drives the VCOM_ENABLE (PC8) signal high, a communication line to the Board Controller is enabled. The
target can then communicate to the host computer via the Board Controller using LEUART0, Location 0 (TX pin PD4, RX pin PD5).
When enabling VCOM, the Board Controller makes communication to the host computer possible on the following interfaces:
• Virtual USB serial port using a CDC driver.
• TCP/IP, by connecting to the Wireless STK on port 4901 with a Telnet client.
Note: Only one of these can be used at the same time, meaning that if a socket is connected to port 4901, no data can be sent or
received on the USB COM port.
10.2 Virtual UART
The Virtual UART port outputs data that the target application outputs over SWO, ITM channel 0.
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UG194: EZR32 Happy Gecko 169 MHz Wireless Starter Kit
Kit Manager and Upgrades
11. Kit Manager and Upgrades
The Kit Manager is a program that comes with Simplicity Studio. It can perform various kit and EZR32 specific tasks.
11.1 Kit Manager Operation
This utility gives the ability to program the EZR32, upgrade the kit, lock and unlock devices and more. Some of the features will only
work with Silicon Labs kits, while other will work with a generic J-Link debugger connected.
Figure 11.1. Kit Manager
11.2 Firmware Upgrades
Upgrading the kit firmware is done through Simplicity Studio. Simplicity Studio will automatically check for new updates on startup.
You can also use the Kit Manager for manual upgrades. Click the [Browse] button in the [Update Kit] section to select the correct file
ending in ".emz". Then, click the [Install Package] button.
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UG194: EZR32 Happy Gecko 169 MHz Wireless Starter Kit
Schematics, Assembly Drawings and BOM
12. Schematics, Assembly Drawings and BOM
The schematics, assembly drawings and bill of materials (BOM) for the hardware included in the EZR32 Happy Gecko 169 MHz Wireless Starter Kit are available through Simplicity Studio when the kit documentation package has been installed.
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UG194: EZR32 Happy Gecko 169 MHz Wireless Starter Kit
Kit Revision History and Errata
13. Kit Revision History and Errata
13.1 Revision History
The kit revision can be found printed on the box label of the kit, as outlined in the figure below.
EZR32HG 169 MHz Wireless Starter Kit
SLWSTK6244A
01-04-16
124802042
A00
Figure 13.1. Revision info
Table 13.1. Kit Revision History
Kit Revision
Released
Description
A00
01.04.2016
Initial kit release.
13.2 Errata
There are no known errata at present.
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UG194: EZR32 Happy Gecko 169 MHz Wireless Starter Kit
Document Revision History
14. Document Revision History
Revision 1.00
2016-04-01
Initial document version.
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Rev. 1.00 | 28
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1 Kit Contents
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1.2 Getting Started
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2. Kit Hardware Layout
3. Kit Block Diagram
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4. Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4.1 Breakout Pads
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4.2 Expansion Header .
4.2.1 Expansion header .
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4.3 Debug Connector.
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4.4 Simplicity Connector.
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4.5 Debug Adapter
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5. Power Supply and Reset . . . . . . . . . . . . . . . . . . . . . . . . . .
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5.1 Radio Board Power Selection
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5.2 Board Controller Power.
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5.3 EZR32 Reset .
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6. Peripherals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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6.3 Si7021 Relative Humidity and Temperature Sensor .
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6.4 USB Micro-B Connector
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7. Board Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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7.1 Admin Console
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8. Advanced Energy Monitor
8.1 Introduction.
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8.2 Theory of Operation .
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8.3 AEM Accuracy and Performance
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8.4 Usage
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9. On-Board Debugger . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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9.2 Debug Modes .
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9.3 Debugging During Battery Operation .
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10. Device Connectivity . . . . . . . . . . . . . . . . . . . . . . . . . . .
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10.1 Virtual COM Port
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Table of Contents
29
10.2 Virtual UART .
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11. Kit Manager and Upgrades . . . . . . . . . . . . . . . . . . . . . . . . .
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11.1 Kit Manager Operation
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11.2 Firmware Upgrades
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13. Kit Revision History and Errata . . . . . . . . . . . . . . . . . . . . . . .
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12. Schematics, Assembly Drawings and BOM
13.1 Revision History.
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13.2 Errata .
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28
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
29
Table of Contents
30
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14. Document Revision History
Simplicity Studio
One-click access to MCU and
wireless tools, documentation,
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Silicon Laboratories intends to provide customers with the latest, accurate, and in-depth documentation of all peripherals and modules available for system and software implementers using
or intending to use the Silicon Laboratories products. Characterization data, available modules and peripherals, memory sizes and memory addresses refer to each specific device, and
"Typical" parameters provided can and do vary in different applications. Application examples described herein are for illustrative purposes only. Silicon Laboratories reserves the right to
make changes without further notice and limitation to product information, specifications, and descriptions herein, and does not give warranties as to the accuracy or completeness of the
included information. Silicon Laboratories shall have no liability for the consequences of use of the information supplied herein. This document does not imply or express copyright licenses
granted hereunder to design or fabricate any integrated circuits. The products are not designed or authorized to be used within any Life Support System without the specific written consent
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