Texas Instruments CC3220 User manual

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CC3220 SimpleLink™ Wi-Fi®LaunchPad™ Development Kit Hardware
SimpleLink, LaunchPad, Internet-on-a chip, BoosterPack, Code Composer Studio, Tiva are trademarks of Texas Instruments.
ARM, Cortex are registered trademarks of ARM Limited.
Bluetooth is a registered trademark of Bluetooth SIG.
IAR Embedded Workbench is a registered trademark of IAR Systems AB.
Wi-Fi is a registered trademark of Wi-Fi Alliance.
All other trademarks are the property of their respective owners.
User's Guide
SWRU463A–February 2017–Revised January 2018
CC3220 SimpleLink™ Wi-Fi®LaunchPad™ Development
Kit Hardware
The CC3220 device is part of the SimpleLink™ microcontroller (MCU) platform which consists of Wi-Fi®,
Bluetooth®low energy, Sub-1 GHz and host MCUs. All share a common, easy-to-use development
environment with a single core software development kit (SDK) and rich tool set. A one-time integration of
the SimpleLink platform lets you add any combination of devices from the portfolio into your design. The
ultimate goal of the SimpleLink platform is to achieve 100 percent code reuse when your design
requirements change. For more information, visit www.ti.com/simplelink.
The CC3220 SimpleLink LaunchPad™ Development Kit (CC3220-LAUNCHXL) is a low-cost evaluation
platform for ARM®Cortex®-M4-based MCUs. The LaunchPad design highlights the CC3220 Internet-on-a
chip™ solution and Wi-Fi capabilities. The CC3220 LaunchPad also features temperature and
accelerometer sensors, programmable user buttons, three LEDs for custom applications, and onboard
emulation for debugging. The stackable headers of the CC3220 LaunchPad XL interface demonstrate how
easy it is to expand the functionality of the LaunchPad when interfacing with other peripherals on many
existing BoosterPack™ Plug-in Module add-on boards, such as graphical displays, audio codecs, antenna
selection, environmental sensing, and more.

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Contents
1 Introduction ................................................................................................................... 3
2 Hardware Description ....................................................................................................... 5
3 Development Environment Requirements .............................................................................. 23
4 Additional Resources ...................................................................................................... 23
List of Figures
1 WEEE Statement ............................................................................................................ 3
2 CC3220 LaunchPad™ EVM Overview ................................................................................... 5
3 CC3220 Block Diagram..................................................................................................... 6
4 Pin 1 Marking on CC3220LP (3V3 Tag).................................................................................. 7
5 Default Jumper Configuration for JTAG Lines........................................................................... 7
6 JTAG IN Connector (J8).................................................................................................... 8
7 I2C Bus Connections ........................................................................................................ 9
8 Power Jumpers J14, J21, J20, J19, J17, and J18..................................................................... 10
9 SOP Jumpers (Default Setting Shown) ................................................................................. 12
10 UART Routed to USB COM Port......................................................................................... 13
11 UART Routed to 20-Pin Header Connector ............................................................................ 13
12 CC3220 BoosterPack Header Pin Assignments....................................................................... 15
13 Powering From USB Jumper Settings................................................................................... 16
14 Powering the CC3220LP From Battery ................................................................................. 17
15 Only CC3220 and Serial Flash Powered by Battery................................................................... 18
16 Low-Current Measurement (<1 mA)..................................................................................... 19
17 Active Power Measurements (>1 mA)................................................................................... 20
18 Using Onboard Antenna (Default Condition) ........................................................................... 21
19 Board Modified for External Antenna Connections .................................................................... 21
20 CC3220x LaunchPad Top-Layer Assembly Drawing.................................................................. 22
List of Tables
1 JTAG Header Pin Definitions............................................................................................... 8
2 I2C Jumper Definitions ...................................................................................................... 9
3 Default I2C Addresses (of Onboard Sensors)............................................................................ 9
4 Jumper Settings for LaunchPad Power ................................................................................. 10
5 External Supply Connections and LED Enable Jumper............................................................... 11
6 Reset Pullup Jumper....................................................................................................... 11
7 SOP[2:0] (J13 on LaunchPad)............................................................................................ 12
8 Push-Button Definitions ................................................................................................... 14
9 LED Indicators.............................................................................................................. 14

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CC3220 SimpleLink™ Wi-Fi®LaunchPad™ Development Kit Hardware
1 Introduction
1.1 CC3220 LaunchPad™
Created for the Internet of Things (IoT), the SimpleLink Wi-Fi CC3220 device is a single-chip
microcontroller (MCU) with built-in Wi-Fi connectivity for the LaunchPad ecosystem, which integrates a
high-performance ARM Cortex-M4 MCU and lets customers develop an entire application with one device.
With on-chip Wi-Fi, Internet, and robust security protocols, no prior Wi-Fi experience is required for fast
development.
The CC3220 LaunchPad, referred to by its part number CC3220-LAUNCHXL, is a low-cost evaluation
platform for ARM Cortex-M4-based MCUs. The LaunchPad design highlights the CC3220 Internet-on-a
chip solution and Wi-Fi capabilities. The CC3220 LaunchPad also features temperature and accelerometer
sensors, programmable user buttons, three LEDs for custom applications, and onboard emulation for
debugging. The stackable headers of the CC3220 LaunchPad XL interface demonstrate how easy it is to
expand the functionality of the LaunchPad when interfacing with other peripherals on many existing
BoosterPack add-on boards, such as graphical displays, audio codecs, antenna selection, environmental
sensing, and more. Figure 2 shows the CC3220 LaunchPad. There are two variants of the LaunchPad:
the CC3220S-LAUNCHXL and the CC3220SF-LAUNCHXL. This user's guide applies to both variants, and
any differences are pointed out in relevant sections.
Multiple development environment tools are also available, including TI’s Eclipse-based Code Composer
Studio™ (CCS) integrated development environment (IDE) and IAR Embedded Workbench®. More
information about the LaunchPad, the supported BoosterPack modules, and the available resources can
be found at TI’s LaunchPad portal. Also visit the CC3220 Wiki page for design resources and example
projects.
NOTE: The maximum RF power transmitted in each WLAN 2.4-GHz band is 17.5 dBM (EIRP
power).
NOTE: The antennas used for this transmitter must be installed to provide a separation distance of
at least 20 cm from all persons, and must not be colocated or operating in conjunction with
any other antenna or transmitter.
NOTE: All figures and references in this document apply to RevA and RevB. Most of the document
also applies to higher revisions, unless otherwise stated. For the exact list of changes made
across board revisions, see the Revision History.
Figure 1. WEEE Statement

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1.2 Key Features
• CC3220, SimpleLink, Wi-Fi, Internet-on-a chip solution with integrated MCU
• 40-pin LaunchPad standard that leverages the BoosterPack ecosystem
• XDS110-based JTAG emulation with serial port for flash programming
• Two buttons and three LEDs for user interaction
• Back-channel universal asynchronous receiver/transmitter (UART) through USB to PC
• Onboard chip antenna with U.FL for conducted testing
• Onboard accelerometer and temperature sensor for out-of-box demo
• Micro USB connector for power and debug connections
1.3 Kit Contents
• CC3220 LaunchPad development tool (CC3220SF-LAUNCHXL)
• Micro USB cable
• Quick start guide
1.4 Regulatory Compliance
The SimpleLink CC3220 Wi-Fi LaunchPad is tested for and found to be in compliance with FCC and ISED
regulations regarding unlicensed intentional radiators.
Hereby, Texas Instruments Inc. declares that the radio equipment type CC3220S-LAUNCHXL and
CC3220SF-LAUNCHXL are in compliance with Directive 2014/53/EU. The full text of the EU declaration of
conformity is available at the following internet addresses:
•CC3220S-LAUNCHXL
•CC3220SF-LAUNCHXL

Micro USB connector
(for debug)
Reset
button Product variant label
External battery connector
Reset pullup enable
User button
Pin 15
Factory reset button
Enable LED
power
Chip
antenna
Sensor
pullups
U.FL connector
(lab tests)
Direct flash access
User button
Pin 04
Enable OPAMP power
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2 Hardware Description
Figure 2 shows the CC3220 LaunchPad EVM.
Figure 2. CC3220 LaunchPad™ EVM Overview

CC3220
S-Flash
32Mbit
40-MHz XTAL
32.768-kHz XTAL
XDS110 JTAG
Debug Probe
USB
Conn
Filter
Acceleration
Sensor
BMA222
Temp Sensor
TMP006
3.3-V LDO
2× AA Battery
Conn Reverse Protection
5 V
5 V
VCC
Push Buttons
GPIO 13, 22 LEDs
GPIO 9,10,11
2× 20 Launchpad Headers
(Compatible with TI MCU Std)
JTAG/SWD
UART (Flashing/Log)
INT (GPIO13)
I2C
U. FL
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2.1 Block Diagram
Figure 3 shows the CC3220 block diagram.
Figure 3. CC3220 Block Diagram
2.2 Hardware Features
• CC3220, SimpleLink, Wi-Fi, Internet-on-a chip solution with integrated MCU
• 40-pin LaunchPad standard that leverages the BoosterPack ecosystem
• TI Standard XDS110-based JTAG emulation with serial port for flash programming
• Supports both 4-wire JTAG and 2-wire SWD
• Two buttons and three LEDs for user interaction
• Virtual COM port UART through USB on PC
• Onboard chip antenna with U.FL for conducted testing selectable using 0-Ωresistors
• Onboard accelerometer and temperature sensor for out-of-box demo, with option to isolate them from
the inter-integrated circuit (I2C) bus
• Micro USB connector for power and debug connections
• Headers for current measurement and external JTAG connection with an option to use the onboard
XDS110 to debug customer platforms
• Bus-powered device, with no external power required for Wi-Fi
• Long-range transmission with a highly optimized antenna (200-meter typical in open air with a 6-dBi
antenna AP)
• Can be powered externally, working down to 2.3 V (typical)

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2.3 Connecting a BoosterPack™
A compatible BoosterPack can be stacked on top of the LaunchPad using the 2-pin × 20-pin connectors.
The connectors do not have a key to prevent the misalignment of the pins or reverse connection.
Ensure that the VCC and 5-V pins are aligned with the BoosterPack module header pins. On the CC3220
LaunchPad, a small white 3V3 tag symbol is provided near pin 1 (see Figure 4) to orient all BoosterPack
modules. This same marking, provided on compatible BoosterPack modules, must be aligned before
powering up the boards.
Figure 4. Pin 1 Marking on CC3220LP (3V3 Tag)
2.4 Wired Connections, Jumper Settings, Buttons, and LEDs
2.4.1 JTAG Headers
The headers are provided on the board to isolate the CC3220 device from the onboard XDS110-based
JTAG emulator. These jumpers are shorted by default when the board is shipped from TI. Figure 5 and
Table 1 are for default configurations, and Figure 6 shows the external emulator connection.
Figure 5. Default Jumper Configuration for JTAG Lines

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(1) The only difference between Rev. A and Rev. B are the reference designators on the board.
(2) For SWD mode, only TCK and TMS must be shorted to the CC3220.
Table 1. JTAG Header Pin Definitions
Reference (Rev. A) Reference (Rev. B)(1) Use Comments
J3 (TCK)(2) J8 (TCK) JTAG / SWD
Jumpers populated: onboard emulator connected
Jumpers not populated: onboard emulator disconnected
J3 (TMS)(2) J8 (TMS) JTAG / SWD
J3 (TDI) J8 (TDI) JTAG
J3(TDO) J8 (TDO) JTAG
To connect an external emulator, remove these jumpers and place the external emulator on the JTAG IN
connector.
Figure 6. JTAG IN Connector (J8)

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2.4.2 I2C Connections
The board features an accelerometer and a temperature sensor for the out-of-box demo. These are
connected to the I2C bus, and can be isolated using the jumpers provided (shown as yellow jumpers J15
and J16 in Figure 7).
Figure 7. I2C Bus Connections
By removing J15 and J16, the accelerometer and the temperature sensors are isolated from the I2C bus.
This measure also removes the I2C pullup resistors from the sensor side of the circuit, and therefore any
connection to the circuit requires the user to install external pullup resistors.
Table 2 lists the I2C jumper definitions.
Table 2. I2C Jumper Definitions
Reference (Rev. A) Reference (Rev. B) Use Comments
J16 J2 I2C SDA Populated: CC3220 SDA connected to onboard sensors with
pullup
Open: CC3220 SDA disconnected from onboard sensors
J15 J3 I2C SCL Populated: CC3220 SCL connected to onboard sensors with
pullup
Open: CC3220 SCL disconnected from onboard sensors
2.4.2.1 Default I2C Addresses
Table 3 lists the default I2C addresses of the onboard sensors.
Table 3. Default I2C Addresses (of Onboard Sensors)
Sensor Type Reference Designator
on LP (Rev. A) Reference Designator on LP (Rev. B) Part Number (Manufacturer) Default Slave Address (Hex)
Temperature (MEMS
IR Thermopile) U10 U6 TMP006 (TI) 0x41
Accelerometer
(Triaxial) U11 U10 BMA222E (Bosch) 0x18

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2.4.3 Power Connections
The board can be powered by using the onboard micro USB connector. An onboard DC-DC converter
provides 3.3 V for the CC3220 and the rest of the board to operate. This supply can be isolated from the
DC-DC using the jumpers on the board. See the yellow jumpers in Figure 8.
Figure 8. Power Jumpers J14, J21, J20, J19, J17, and J18
NOTE: The blue jumpers in Figure 8 are previously discussed (see Section 2.4.1) and are populated
by default. Figure 8 does not show unpopulated jumpers (which would be populated
normally).
Table 4 lists the jumper settings for the LaunchPad power.
Table 4. Jumper Settings for LaunchPad Power
Reference (Rev. A) Reference (Rev. B) Use Comments
J14 J5 OPAMP EN
If the jumper is uninstalled, the power supply to the
OPAMP is cut off. This can be used to enable low-
current measurements. Ensure that this jumper is on to
use the OPAMP to drive the input to the ADC. The
reference voltage of the ADC is 1.47 V, so up to 3.48 V
can be applied to the input of the OPAMP. For the
configuration of the OPAMP, see the CC3220
LaunchPad Design Files.
J21 J10 GND Ground reference
J20 J29 +5 VDC power
jumper Connects J19, +5 VDC to emulator section
J19 J12 Current
measurement Measures the current flowing into the CC3220 device.
Also includes the serial flash and any stacked
BoosterPack.
J17 J13 Board power Short: Supply the board power from the onboard DC- DC converter. The board power includes the sensors,
LED, and the OPAMP used to drive the ADC input.
J18 J28 VSENSE Used to power the level shifters on the emulator side of
the board. The level shifters can be powered by
shorting this jumper. Removing this jumper enables
low-current measurement.

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The board can be powered by an external supply when USB power is not available, by using either J22 or
J23. J24 is also available to remove any current draw from LEDs being driven by the GPIOs, see Table 5.
Table 5. External Supply Connections and LED Enable Jumper
Reference (Rev. A) Reference (Rev. B) Use Comments
J19 J12 Alternative 3.3-V
power input
Can be used to power the board from an external
3.3-V supply; this can be used to test the VBAT
voltage range as the reverse voltage protection diode
on J22 drops the input by approximately 150 mV.
J23 J19 5-V power input Used to power the board from an external 5-V
supply.
J22 J20 3.3-V power input Used to power the board from an external 3.3-V
supply. J22 has built-in reverse voltage protection to
prevent the battery from being plugged in the reverse
manner.
J24 J9 LED EN If uninstalled, the LEDs connected to the GPIO are disabled; this can be used to enable low-power
measurements.
2.4.4 Reset Pullup Jumper
Table 6 lists the reset pullup jumper.
Table 6. Reset Pullup Jumper
Reference (Rev. A) Reference (Rev. B) Use Comments
J9 J26 RESET pullup Install this jumper to enable the pullup resistor on the nRESET pin of the device, when the board is powered
from an external supply.

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2.4.5 Sense on Power (SOP)
The CC3220 can be set to operate in four different modes, based on the state of the sense-on-power
(SOP) lines. These SOP lines are pins 21, 34, and 35 on the CC3220 device. Table 7 describes the state
of the device, and Figure 9 shows the SOP jumpers.
Table 7. SOP[2:0] (J13 on LaunchPad)
Binary
Value Function
000 Functional mode and 4-wire JTAG
001 Functional mode and 2-wire JTAG
010 Functional mode and flash programming
011 Factory default
100 Flash programming
Figure 9. SOP Jumpers (Default Setting Shown)
NOTE: SOP[2:0] corresponds to J13 in the LaunchPad schematic design.
NOTE: No jumpers on the block ensure that the line is pulled low using 100-kΩpulldown resistors.
Placing the jumper pulls the pin high using a 270-Ωresistor.

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2.4.6 UART Signals
The board supports a USB-based virtual COM port, using the Tiva™ ARM®MCU. The LaunchPad is
shipped with the UART lines from the CC3220 connected to the UART on the Tiva MCU. The CC3220
UART can also be routed to the 20-pin connector for use as a GPIO or external UART. The selection is
performed using jumpers on the board.
Figure 10 shows the UART routed to USB COM port and Figure 11 shows the UART routed to 20-pin
header connector.
Figure 10. UART Routed to USB COM Port
Figure 11. UART Routed to 20-Pin Header Connector

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2.4.7 Push-Buttons and LED Indicators
Table 8 list the push-button definitions.
Table 8. Push-Button Definitions
Reference (Rev. A) Reference (Rev. B) Use Comments
SW1 SW1 RESET This is used to reset the CC3220 device. This signal is also output
on the 20-pin connector to reset any external BoosterPack which
may be stacked. The reset can be isolated using the jumper block
at the center of the board.
SW2 SW3 GPIO_13 When pushed, GPIO_13 is pulled to VCC.
SW3 SW2 GPIO_22 When pushed, GPIO_22 is pulled to VCC.
SW4 SW4 Factory default Pressing this button and toggling RESET restores the factory
default image on the serial flash. This can be used to recover a
corrupted serial flash, provided the s-flash was programmed with a
recovery image.
Table 9 lists the LED indicators.
(1) GPIO_10 and GPIO_11 are also used as I2C. Thus, when the pullup resistors are enabled, the LEDs are on by default, without
configuring the GPIOs.
Table 9. LED Indicators
Reference
(Rev. A) Reference (Rev. B) Color Use Comments
D1, D2 D2, D9 Green and
Red Debug Indicates the state of the JTAG emulator. For TI use only.
D3 D1 Yellow nRESET Indicates the state of the nRESET pin. If this LED is on, the
device is functional.
D6 D8 Red Factory Reset Indicates that the push-button for the factory reset is pressed.
D7 D4 Red Power Indicates when the 3.3-V power is supplied to the board.
D8 D5 Green GPIO_11(1) On when the GPIO is logic-1.
D9 D6 Yellow GPIO_10(1) On when the GPIO is logic-1.
D10 D7 Red GPIO_09 On when the GPIO is logic-1.

CC3220
Wi-Fi
NWP
J1
J3 J4
J2
+3.3 V
GPIO_03 *
+5 V
GPIO_13
GPIO_12
GPIO_06
GPIO_04 *
GPIO_14 *
GPIO_07
GPIO_10
GPIO_11
GND
ANALOG_IN
UART_RX
UART_TX
GPIO
ADC_CH2
SPI_CLK
GPIO
12C SCL
12C SDA
1
2
5
62
59
61
3
4
58
GPIO_02ANALOG_IN57
GPIO_05ANALOG_IN60
GPIO_03
ANALOG_IN58
GPIO_04ANALOG_IN59
GPIO_08I2C WS63
GPIO_3012S SCLK53
GPIO_0012S SDin50
GPIO_09I2S SDout64
GND
GPIO_17 SPI CS Wls. 8
18GPIOGPIO_28
45GPIOGPIO_31
RST
GPIO_15
GPIO_16 7MOSI
6MISO
GPIO_01
GPIO_25 21MOSI
55MISO
15GPIOGPIO_22
2PWMOUT
1PWMOUT
17
PWM
NA
64
PWM
IN
62GPIOOUT
60GPIOOUT
16GPIOIN
17GPIOGPIO_24
18CCAP/GPIONA
21
CCAP
OUT
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2.4.8 BoosterPack Header Pin Assignment
The TI BoosterPack header pinout specification is at Build Your Own BoosterPack. Also see the BoosterPack Pinout Standard.
The CC3220 LaunchPad follows this standard, with the exception of naming. (P1:P4 is used instead of J1:J4.) See Figure 12 for CC3220 pin-
mapping assignments and functions.
Figure 12. CC3220 BoosterPack Header Pin Assignments
NOTE: RESET output is an open-drain-type output and can only drive the pin low. The pullup ensures that the line is pulled back high when the
button is released. No external BoosterPack can drive this pin low.
All the signals are referred to by the pin number in the SDK; Figure 12 shows the default mappings. Some of the pins are repeated across the
connector. For instance, pin 62 is available on P1 and P4, but only P1 is connected by default. The signal on P4 is marked with an asterisk (*) to
signify that it is not connected by default. The signal can be routed to the pin by using a 0-Ωresistor in the path. For the exact resistor placement,
see the CC3220 SimpleLink Wi-Fi Wireless MCU LaunchPad Board Design Files.

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2.5 Power
2.5.1 USB Power
The LaunchPad is designed to work from the USB-provided power supply. The LaunchPad provides
addresses as a bus-powered device on the computer. When the board is powered from the USB
connector, the jumpers must be placed on the following headers, as shown in Figure 13.
Figure 13. Powering From USB Jumper Settings

-
+
2 AA
x
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2.5.2 Battery Power
The LaunchPad can also be powered from an external battery pack by feeding the voltage on the J22
header. This input features reverse voltage protection to ensure that the board is not damaged due to an
accidental reverse voltage. Perform the following steps before using the board with a battery.
1. Remove the USB cable.
2. Plug in the battery pack on J22 with the correct polarity (see Figure 14).
3. Connect the jumper across J17 and J19 as shown in Figure 14.
Figure 14. Powering the CC3220LP From Battery

-
+
2 AA
x
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2.5.3 Battery Powering Only the CC3220 and U8 (Onboard Serial Flash)
In some cases, there may be a requirement to power only the CC3220 and the serial flash from the
battery. The usage may not require LEDs, OPAMP for the ADC, and the sensors. In this case, the other
sections can be powered off by removing the appropriate jumpers. Ensure that a jumper is placed on
RST_PU (J9) of the LaunchPad. The board would appear as shown in Figure 15.
Figure 15. Only CC3220 and Serial Flash Powered by Battery
2.6 Isolated Current Measurement of the CC3220
To measure the current draw of the CC3220 when powering with a USB cable, use the VBAT jumper on
the jumper isolation block (J19). The current measured in this mode includes only the CC3220 current and
the serial flash current, and no external blocks. However, if a GPIO of the CC3220 is driving a high-current
load such as an LED, then that is also included in this measurement.

mA
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2.6.1 Low-Current Measurement With USB Power (< 1 mA)
Follow these steps to measure ultra-low power operation of the CC3220:
1. Remove the VBAT jumper (J19); attach an ammeter across this jumper, as shown in Figure 16. Ensure
that jumpers are placed on J5, J6, and J17. The CC3220 device should not drive any high-current
loads directly (such as an LED) because this can draw a large current.
Figure 16. Low-Current Measurement (<1 mA)
2. Begin target execution and set the device to low-power modes (LPDS or hibernate).
3. Measure the current. If the current levels are fluctuating, it may be difficult to get a stable
measurement. It is easier to measure quiescent states.
NOTE: To measure the low-power numbers, remove the LEDs (D8, D9, and D10 on the board) by
removing the LED EN jumper (J24). Similarly, the shutdown mode leaks approximately 33 μA
into the pullup resistor (R136) on the nRESET pin. This pullup resistor must also be removed
to measure the total current below 1 µA in shutdown mode.

R
Oscilloscope
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2.6.2 Active Power Measurements (>1 mA)
Follow these steps to measure active operation of the CC3220:
1. Remove the VBAT jumper (J19).
2. Solder a 0.1-Ωresistor on a wire, which can be connected to an oscilloscope, as shown in Figure 17.
Or, attach a jumper wire between J19 so that it can be used with a current probe.
Figure 17. Active Power Measurements (>1 mA)
3. Measure the voltage across the resistor using an oscilloscope with a differential probe. (For the current
probe, coil the wire around the sensor multiple times for good sensitivity.) An ammeter can also be
used for this measurement, but the results may be erroneous due to the switching nature of the
current.