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Summary of Contents for Nordic Semiconductor nRF52
- Page 1 DK Hardware v3.x.x User Guide 4397_500 / 2023-04-11...
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Page 2: Table Of Contents
Contents Revision history ........Environmental and safety notices . -
Page 3: Revision History
• Software tools • Measuring current on page 30 • Preparing the DK on page 30 February 2017 • Created PDF for nRF52 DK v1.1.x (valid for all DK versions) • Added Mass Storage Device on page 9 • Updated: 4397_500... - Page 4 Date Description • Interface MCU firmware • Solder bridge and test point overview on page 27 Previous versions PDF files for relevant previous versions are available here: • nRF52 DK User Guide v2.x.x • nRF52 DK User Guide v1.3.1 4397_500...
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Page 5: Environmental And Safety Notices
Environmental and safety notices Environmental and safety notices for the DK and power supply requirements. Note: The nRF52 DK must be powered by a PS1 class (IEC 62368-1) power supply with maximum power less than 15 W. Skilled persons The nRF52 DK is intended for use only by skilled persons. -
Page 6: Introduction
Introduction The nRF52 Development Kit (DK) is a hardware development platform used to design and develop application firmware on the nRF52832, nRF52810, or nRF52805 System on Chip (SoC)s. Key features ™ ™ ® • nRF52832 flash-based Bluetooth Low Energy and ANT... -
Page 7: Kit Content
Kit content The nRF52 DK includes hardware, preprogrammed firmware, documentation, hardware schematics, and layout files. The nRF52 DK (PCA10040) comes with a Near Field Communication (NFC) antenna. Figure 1: nRF52 DK (PCA10040) and NFC antenna Hardware files The hardware design files including schematics, Printed Circuit Board (PCB) layout files, bill of materials,... -
Page 8: Interface Mcu
Interface MCU The interface MCU on the nRF52 DK runs SEGGER J-Link Onboard (OB) interface firmware and is used to program and debug the firmware of the nRF52832 SoC. Figure 2: Interface MCU 3.1 Reset button The nRF52 DK has a Reset button (SW5). -
Page 9: Dynamic Hardware Flow Control
Interface MCU GPIO nRF52832 nRF52832 UART Interface MCU UART P0.05 P0.06 P0.07 P0.08 Table 1: Relationship of UART connections on nRF52832 and interface MCU The UART signals are routed directly to the interface MCU. The UART pins connected to the interface MCU are tri-stated when no terminal is connected to the virtual serial port on the computer. - Page 10 Interface MCU • If the computer is set up to boot from USB, it can try to boot from the DK if it is connected. This can be avoided by unplugging the DK before a computer restart or changing the boot sequence of the computer.
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Page 11: Hardware Description
Hardware description The nRF52 DK (PCA10040) features an onboard programming and debugging solution. In addition to radio communication, the SoC can communicate with a computer through Universal Serial Bus (USB) and a virtual serial port provided by the interface MCU. -
Page 12: Block Diagram
UART HWFC antenna Switch IF Boot/Reset 32.768 kHz 32 MHz Figure 5: Block diagram 4.3 Power supply The nRF52 DK has three power options: USB (5 V), external power supply (1.7 V to 3.6 V), and coin cell battery. 4397_500... - Page 13 Hardware description Figure 6: Power supply options (front) Figure 7: Power supply options (back) The 5 V from the USB is regulated down to 3.3 V through an onboard voltage regulator. The battery and external power supply are not regulated. The power from the regulator and external supply is routed through diodes for reverse voltage protection (D1 and D7), where the circuit is supplied from the source with the highest voltage.
- Page 14 Hardware description Instrument ground Voltage regulator Reverse voltage protection Power switch nRF current measurement VBUS' VREG_IN VREG_OUT VSUPPLY VBUS VBUS' VDD_nRF SB10 TP12 SB33 SB35 TP13 SB34 Vout N.C. VSUPPLY 1.0µF 1.0µF 100nF AP7333-33 USB_DETECT 3.3V-300mA VREG_DETECT VBUS' VBUS' VBUS_IMCU Pin List 1x2, Angled 220k SB12...
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Page 15: Connector Interface
Some of the signals are also available on connectors P7, P8, P9, P10, P11, and P12, located on the back side of the DK. By mounting pin lists on the connector footprints, the nRF52 DK can be used as a shield for 3.3 V Arduino motherboards or other boards that follow the Arduino standard. -
Page 16: Buttons And Leds
Hardware description Figure 11: Arduino signals routing on the nRF52 DK 4.5 Buttons and LEDs The four buttons and four LEDs on the nRF52 DK are connected to dedicated GPIOs on the nRF52832 SoC. Part GPIO Short P0.13 BUTTON 1 P0.14... -
Page 17: I/O Expander For Buttons And Leds
Figure 13: Button and LED configuration 4.5.1 I/O expander for buttons and LEDs The onboard GPIOs for the buttons and LEDs can conflict with boards that follow the Arduino standard. To avoid such conflicts, the nRF52 DK has an I/O expander. 4397_500... - Page 18 LED4 Table 4: GPIO connection The I/O expander releases these GPIOs for general use when the nRF52 DK is used together with boards that follow the Arduino standard. The I/O expander can be permanently enabled by shorting solder bridge SB18, or permanently disabled by cutting the shorting track on SB19. You must also short SB18 when cutting SB19 for full compatibility with the Arduino standard.
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Page 19: Khz Crystal
The nRF52832 SoC can use an optional 32.768 kHz crystal (X2) for higher accuracy and lower average power consumption. On the nRF52 DK, P0.00 and P0.01 are used for the 32.768 kHz crystal by default and are not available as GPIO on the connectors. -
Page 20: Debug Input
Hardware description Figure 16: Configuring P0.00 and P0.01 Figure 17: 32.768 kHz crystal and SB1–SB4 4.7 Debug input The Debug in connector (P18) makes it possible to connect external debuggers for debugging while running on a battery or an external power supply. 4397_500... -
Page 21: Debug Out For Programming External Boards
The nRF52 DK supports programming and debugging external boards with nRF51 Series or nRF52 Series SoCs. The interface MCU on the nRF52 DK runs SEGGER J-Link OB interface firmware and is used to program and debug the firmware of the nRF52832 SoC, by default. -
Page 22: Programming An External Board
MCU programs or debugs the target chip on the external board instead of the onboard nRF52832 SoC. If it is inconvenient to have a separate power supply on the external board, the nRF52 DK can supply power through the Debug out connector P19. To enable this, short solder bridge SB32. -
Page 23: Programming A Board With Custom Connections
Hardware description Figure 21: Debug output connector P19 Pin number Signal Description SWD0_VTG Optional voltage supply to the external target SWD0_SWDIO SWD Data Input/Output SWD0_SELECT Debug out select signal. Connect to ground on external board. SWD0_SWDCLK Serial Wire Clock line Ground SWD0_SW0 The Serial Wire Output (SWO) line is not needed for... - Page 24 SoC. If it is inconvenient to have a separate power supply on the external board, the nRF52 DK can supply power through pin 2 (VDD) of P20. The connection is shown with a grey outline in...
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Page 25: Nfc Antenna Interface
Table 7: Pinout of connector P20 for programming external targets 4.9 NFC antenna interface The nRF52 DK supports an NFC tag. NFC-A Listen Mode operation is supported on the nRF52832 SoC. The NFC antenna input is available on connector P23 on the nRF52 DK. - Page 26 Hardware description Figure 24: NFC antenna connector NFC uses two pins, pin 11 (NFC1) and pin 12 (NFC2), to connect the antenna. These pins are shared with GPIOs (P0.09 and P0.10). The PROTECT field of the NFCPINS register in User Information Configuration Registers (UICR) defines the usage of these pins and their protection level against abnormal voltages.
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Page 27: Solder Bridge And Test Point Overview
4.10 Solder bridge and test point overview The nRF52 DK has a range of solder bridges for enabling or disabling functionality on the DK. It also has test points available for use. Changes to these are not needed for normal use of the DK. - Page 28 No function on the current BOM SB45 Open No function on the current BOM Table 8: Solder bridge configuration for nRF52 DK (v3.0.0 and higher) The following table is a complete overview of the test points on the nRF52 DK. 4397_500...
- Page 29 Hardware description Designator Signal Description Size Layer IMCU_P USB connector D+ 1.0 mm IMCU_N USB connector D- 1.0 mm VBUS USB voltage before power 1.0 mm switch Ground 1.0 mm VCOM0_CTS UART CTS 1.0 mm VCOM0_RxD UART RXD 1.0 mm VCOM0_RTS UART RTS 1.0 mm...
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Page 30: Measuring Current
Measuring current The current drawn by the nRF52832 SoC can be monitored on the nRF52 DK. Current can be measured using any of the following test instruments: • Power analyzer • Oscilloscope • Ampere meter • Power Profiler Kit II (PPK2) Power analyzer and PPK2 measurements are not described in this document. -
Page 31: Using An Oscilloscope For Current Profile Measurement
Measuring current Figure 26: Preparing the DK for current measurements • To put P22 in series with the load, cut the PCB track shorting solder bridge SB9. • If using an external power supply, short solder bridge SB12 to bypass the protection diode, which would otherwise give a voltage drop. -
Page 32: Using An Ampere Meter For Current Measurement
Measuring current Figure 27: Current measurement with an oscilloscope To reduce noise, take the following actions: • Use probes with 1x attenuation. • Enable averaging mode to reduce random noise. • Enable high-resolution function if available. Use a minimum of 200 kSa/s (one sample every 5 µs) to get the correct average current measurement. 5.3 Using an ampere meter for current measurement The average current drawn by the nRF52832 SoC can be measured using an ampere meter. - Page 33 Measuring current Figure 28: Current measurement with an ampere meter 4397_500...
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Page 34: Rf Measurements
RF measurements The nRF52 DK is equipped with a small coaxial connector (J1) for conducting measurements of the RF signal with a spectrum analyzer. The connector is of Microwave coaxial connector with switch (SWF) type (Murata part no. MM8130-2600) with an internal switch. By default, when no cable is attached, the RF signal is routed to the onboard trace antenna. -
Page 35: Glossary
Glossary Clear to Send (CTS) In flow control, the receiving end is ready and telling the far end to start sending. Data Terminal Ready (DTR) A control signal in RS-232 serial communications transmitted from data terminal equipment, such as a computer, to data communications equipment. Development Kit (DK) A hardware development platform used for application development. - Page 36 Operational Amplifier (op-amp) A high-gain voltage amplifier that has a differential input and, usually, a single output. Printed Circuit Board (PCB) A board that connects electronic components. Receive Data (RXD) A signal line in a serial interface that receives data from another device. Request to Send (RTS) In flow control, the transmitting end is ready and requesting the far end for a permission to transfer data.
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Page 37: Recommended Reading
Recommended reading In addition to the information in this document, you may need to consult other documents. Nordic documentation • nRF52832 Product Specification • nRF52832 Compatibility Matrix • nRF52832 Errata 4397_500... -
Page 38: Legal Notices
Nordic Semiconductor ASA customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Nordic Semiconductor ASA for any damages resulting from such improper use or sale.
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