Nordic nRF51822 Bedienungsanleitung
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nRF51822 mbed Kit User Guide v1.0
1 Introduction
The nRF51822 mbed kit is a stand-alone platform for rapid prototyping of Bluetooth® Smart designs with the
nRF51822 SoC. The mbed kit gives access to all GPIO pins through pin headers and incorporates a coin-cell
battery holder for portability enabling in-situ evaluation and test.
1.1 Minimum requirements
•ComputerwithaUSBport
1.2 nRF51822 mbed kit release notes
Date Kit version Description
April 2014 1.0 • First release
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nRF51822 mbed Kit User Guide v1.0
2 Kit content
The nRF51822 mbed kit consists of hardware and access to software components, documentation, and
design files from www.mbed.org or www.nordicsemi.com.
2.1 nRF51822 mbed kit hardware content
Figure 1 nRF51822 mbed kit hardware content
1 x nRF51822 mbed kit board (PCA10024) 1 x Lithium 3 V battery
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nRF51822 mbed Kit User Guide v1.0
2.2 Downloadable content
The nRF51822 mbed kit includes access to the mbed online toolchain and source code, documentation,
hardware schematics, and layout files. To access this information, go to www.mbed.org or
www.nordicsemi.com.
2.2.1 nRF51822 documentation
• nRF51822 mbed Kit User Guide
• nRF51 Series Reference Manual
• nRF51822 Product Specification
• S110 nRF51822 SoftDevice Specification
• nRF51822 Product Anomaly Notification
2.2.2 Schematics, Bill of Materials, PCB layout files, and production files
The ZIP file and its subdirectories contain the hardware design files for the mbed kit.
• Altium Designer files
•Schematics
• PCB layout files
• Production files
• Assembly drawings
• Drill files
•Gerberfiles
• Pick and Place files
•BillofMaterials
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nRF51822 mbed Kit User Guide v1.0
3 Getting started
This section shows you how to get access to the mbed web site, tools, libraries, and documentation.
Connect your nRF51822 mbed kit to a computer.
1. Connect your mbed kit to a computer with a USB cable.
2. The status light (LD3) will come on, indicating it has power.
3. After a few seconds, the computer will recognize the mbed microcontroller as a standard USB
drive.
Figure 2 Windows example
Figure 3 MAC OS example
Click the MBED.HTM file to log in.
1. Go to the new USB Drive and click MBED.HTM to open it in a web browser.
2. If you do not have an mbed account, click Signup to create your mbed account. Otherwise, log in
with your normal username and password. This will give you access to the website, tools, libraries,
and documentation.
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nRF51822 mbed Kit User Guide v1.0
4 Hardware description
The nRF51822 mbed kit board (PCA10024) is a standalone mbed enabled development board. The board is
delivered with an unprogrammed nRF51822 chip.
4.1 Key features
The mbed kit board has the following key features:
• nRF51822 System on Chip combining Bluetooth v4.1-compliant 2.4 GHz multiprotocol radio
and ARM® Cortex®-M0 processor on a single chip optimized for ultra-low power operation.
• 31 GPIOs accessible on pin headers.
• USB drag and drop programming.
• USB virtual COM port for serial terminal.
• CMSIS-DAP interface for programming and debugging from offline tools.
• Accepts power through:
•USB
•Externalsource
• Single 2032 coin-cell battery, onboard battery holder
• Pin header for current measurement.
4.2 Hardware figures
Figure 4 mbed kit board top
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nRF51822 mbed Kit User Guide v1.0
Figure 5 mbed kit board bottom
4.3 nRF51822 reset
The Reset button (SW3) is connected to the Interface MCU, therefore the mbed kit board needs to be
powered through USB and the Interface MCU switch (SW4) must be switched to ON in order to reset the
nRF51822 chip by pressing the reset button.
When the mbed kit board is powered through external power or a CR2032 battery, cycling the Target power
(SW5) will result in a power on reset.
Figure 6 mbed kit board switches
Interface MCU
SW4
Reset
SW3
Target power
SW5
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nRF51822 mbed Kit User Guide v1.0
4.4 Power supply
The mbed kit board has several power options as seen in Figure 7 and Figure 8.
•USB
• External power supply through P1 (1.8 V to 3.6 V)
• CR2032 coin cell battery
Figure 7 USB and external power supply
Figure 8 Coin cell battery supply
USB
P1
+ -
Coin cell
battery holder
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nRF51822 mbed Kit User Guide v1.0
The 5 V from the USB is regulated down to 3.3 V through an on-board voltage regulator. The battery and
external power supply are not regulated. The power sources are routed through a set of diodes (D1A, D1B,
and D1C) where the circuit is supplied from the source with the highest voltage.
Figure 9 Power supply circuitry
GND GND
C18
100nF
GND
C17
1.0μF
VCC5
VCC3
5V
V5
VBUS
R8
0R
C16
1.0μF
+Bat1
Bat Holder CR2032
Vin
GND
Vout
U2
AP7333-33SAG-7
GND
1
2
3
4
P1
Pin List 1x4
GND
GND
D1A
SD103ATW-7-F
D1B
SD103ATW-7-F
D1C
SD103ATW-7-F
VCC_IO
VCC_nRF
R4
N.C.
SB8
Solderbridge
VCC_nRF
SW5
CUS-12TB
V3
VCC_SW
SW_EN
R3
1M0
GND
Q2A
FDG6303N
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nRF51822 mbed Kit User Guide v1.0
4.5 Interface MCU disconnect
The Interface MCU circuit on the mbed kit board only works when the board is powered through the USB
connector. To ensure that the Interface MCU will not hold any of the SWD or UART lines while powered
down, the SWD lines will be disconnected automatically when the USB cable is unplugged. However, to
disconnect the lines manually, the board is equipped with a switch (SW4) that disconnects the lines even if
the board is powered through the USB, see Figure 10.
Figure 10 Interface MCU disconnect logic
Note: When using the Interface MCU to program, debug, or enable UART on the nRF51822 chip, you
must switch SW4 to ON.
Interface_MCU_CTS
Interface_MCU_RTS
Interface_MCU_RxD
SWDIO
SWCLK
T_TMS
T_TCK
SW_IN C19
100nF
GND
GND
NC1
10
IN1 9
NO2
15 COM2
13 NC2
16
GND 6
NO3
1COM3
2NC3
3
IN2 8
IN3 7
N.C. 5
EN 4
VCC 14
NO1
11 COM1
12
U4
NX3L4053
VCC_SW
SW_EN
Interface_MCU_TxD
SW_IN C20
100nF
GND
GND
NC1
10
IN1 9
NO2
15 COM2
13 NC2
16
GND 6
NO3
1COM3
2NC3
3
IN2 8
IN3 7
N.C. 5
EN 4
VCC 14
NO1
11 COM1
12
U5
NX3L4053
VCC_SW
SW_EN
P0.08
P0.09
P0.10
P0.11
VCC3
R2
100k
SW4
Switch
GND
SW_IN
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