Dialog Semiconductor DA14530/1 Instructions for use

User Manual
DA14531 Development Kit Pro
Hardware User Manual
UM-B-114
Abstract
Dialog Semiconductor’s DA14531 development kit PRO consists of one DA145xx DEVKT-P PRO-
Motherboard, FCGQNFN daughterboard and a WLCSP daughterboard (the WLCSP daughterboard
must be purchased separately). This user manual describes the system functions of the hardware as
well as the guidelines of how to enable or disable features of the DA14531 development kit PRO.

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Contents
Abstract................................................................................................................................................ 1
Contents............................................................................................................................................... 2
Figures.................................................................................................................................................. 4
Tables ................................................................................................................................................... 5
1 Terms and Definitions................................................................................................................... 7
2 References..................................................................................................................................... 7
3 Introduction.................................................................................................................................... 8
3.1 System Overview................................................................................................................10
3.1.1 Features of DA14531 PRO-DB ........................................................................... 10
3.1.2 Features of DA14531 PRO-MB...........................................................................10
4 Getting to Know DA14531 DK PRO ........................................................................................... 11
4.1 DA14531 PRO-DB.............................................................................................................. 11
4.1.1 Power Section......................................................................................................13
4.1.2 RF Section...........................................................................................................15
4.2 PRO-MB (376-18-B)............................................................................................................ 16
4.2.1 USB HUB (U11)...................................................................................................18
4.2.2 USB to UART (U12)............................................................................................. 18
4.2.3 USB to JTAG (U4)...............................................................................................19
4.2.4 Voltage Translator ...............................................................................................20
4.2.5 Power Section......................................................................................................21
5 GPIOs and Pin Assignment and Functions of DA14531 DK PRO .......................................... 22
5.1 DA14531 WLCSP17 PRO-DB, Default Setup .................................................................... 24
5.2 DA14531 FCGQFN24 PRO-DB, Default Setup..................................................................25
5.3 PRO-MB Setup ................................................................................................................... 27
5.3.1 Reset.................................................................................................................... 27
5.3.2 JTAG.................................................................................................................... 28
5.3.3 SPI Data Flash (U2)............................................................................................. 28
5.3.4 UART...................................................................................................................29
5.3.4.1 Single-wire UART............................................................................ 30
5.3.4.2 2-wire UART Configuration.............................................................. 30
5.3.4.3 Full UART (4-wire) Configuration ....................................................31
5.3.5 Push Buttons ....................................................................................................... 32
5.3.6 User LED (D5) and C-Trig (Software Cursor)...................................................... 33
5.3.7 mikroBUS 2 Interface........................................................................................... 34
5.3.8 Arduino Interface ................................................................................................. 35
6 How to Configure Power of DA14531 DK PRO......................................................................... 36
6.1 Battery Operation................................................................................................................37
6.1.1 Enabling Coin Cell Battery on DA14531 PRO-DB .............................................. 38
6.1.2 Enabling Coin Cell Battery on PRO-MB.............................................................. 38
7 First Steps with DA14531 DK PRO ............................................................................................ 40
7.1 Configuration of DA14531 DK PRO with a DA14531 FCGQFN24 PRO-DB......................40
7.2 Configuration of DA14531 DK PRO with a DA14531 WLCSP17 PRO-DB........................42
8 Current Measurements ............................................................................................................... 43

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8.1 Current Measurement Circuit of PRO-MB .......................................................................... 43
8.2 Power Profiler of Smartsnippet Toolbox .............................................................................44
8.3 Power Profiler Setup ........................................................................................................... 45
8.4 Measurements ....................................................................................................................47
8.5 Power Profiler Software Cursors......................................................................................... 49
8.6 Manual Calibration .............................................................................................................. 49
8.7 Accuracy of Current Measurement Circuit.......................................................................... 51
9 Known Issues .............................................................................................................................. 53
9.1 Switching Transient Artifacts of Current Measurement Circuit........................................... 53
9.2 Push Button SW3................................................................................................................ 53
9.3 mikroBUS Wrong Labels.....................................................................................................54
9.4 4-Wire UART Special Considerations.................................................................................54
Appendix A FCGQFN24 PRO-DB: DA14531-00FXDB-P_(376-04-F2)............................................ 56
A.1 Schematic ........................................................................................................................... 56
A.2 Components Placement...................................................................................................... 57
Appendix B WLCSP17 PRO-DB: DA14531-00OGDB-P_(376-05-E)............................................... 58
B.1 Schematic ........................................................................................................................... 58
B.2 Components Placement...................................................................................................... 59
Appendix C PRO-MB......................................................................................................................... 60
C.1 Schematic ........................................................................................................................... 60
C.2 Components Placement...................................................................................................... 64
Appendix D Detailed Description of Hardware Setup.................................................................... 65
D.1 DA14531 WLCSP17 PRO-DB, GPIOs Configuration, and R-matrix..................................65
D.2 DA14531 FCGQFN24 PRO-DB, GPIOs Configuration, and R-matrix................................ 66
Appendix E SPI Data Flash, JTAG, and Single-Wire UART (Default)........................................... 69
E.1 DA14531 WLCSP17 PRO-DB and PRO-MB Settings........................................................ 69
E.2 DA14531 FCGQFN24 PRO-DB and PRO-MB Settings .....................................................71
Appendix F Enabling UART, JTAG and 32.768 kHz Crystal.......................................................... 75
F.1 UART (2-wire), JTAG, and 32.768 kHz Crystal .................................................................. 75
F.2 Full UART and JTAG .......................................................................................................... 77
Appendix G Operating the DK PRO at 1.5V (boost mode) ............................................................ 79
G.1 Adding external resistor to VLDO Selection (J5) pin header..............................................79
G.2 Using external power supply............................................................................................... 79
G.3 Important Notice For Boost Operation ................................................................................ 79
Revision History ................................................................................................................................ 81

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Figures
Figure 1:DK PRO, DA14531-00FXDEVKT-P DK with PRO-MB and the PRO-DBs............................. 8
Figure 2: Block Diagram of the DA14531 DK PRO Hardware Platform.............................................. 10
Figure 3: System Block Diagram of DA14531 PRO-DB......................................................................11
Figure 4: DA14531-00FXDB-P, FCGQFN24 PRO-DB_[376-04-F].....................................................11
Figure 5: DA14531-00OGDB-P, WLCSP17 PRO-DB_[376-05-E]...................................................... 12
Figure 6: DA14531 PRO-DB Power Section....................................................................................... 13
Figure 7: Power Section of DA14531 PRO-DB...................................................................................14
Figure 8: RF Section of DA14531 PRO-DB ........................................................................................15
Figure 9: Modifications Required for Performing RF Measurements..................................................15
Figure 10: DA145xx DEVKT-P PRO-MB Block Diagram....................................................................16
Figure 11: PRO-MB (376-18-x)........................................................................................................... 16
Figure 12: USB HUB Circuitry of DA14531 PRO-MB ......................................................................... 18
Figure 13: USB to UART (U12)...........................................................................................................19
Figure 14: USB to JTAG (U4).............................................................................................................. 20
Figure 15: Voltage Translator Circuitry of DA14531 PRO-MB............................................................20
Figure 16: Power Topology for DA14531 PRO-MB and PRO-DB ...................................................... 21
Figure 17: Power Circuit for DA14531 PRO-MB.................................................................................21
Figure 18: J2, Breakout Header of DA14531 PRO-MB....................................................................... 22
Figure 19: J1, Configuration Header on DA14531 PRO-MB............................................................... 23
Figure 20: RESET Circuit on DA14531 PRO-MB ...............................................................................27
Figure 21: Reset Pin Assignment on PRO-DBs for FCGQFN24 and WLCSP17 ...............................27
Figure 22: Optional Debug Port........................................................................................................... 28
Figure 23: SPI Data Flash Circuit in DA14531 DK Pro ....................................................................... 29
Figure 24: Single-wire UART for DA14531 WLCSP17 PRO-DB ........................................................ 30
Figure 25: 2-wire UART Connectivity.................................................................................................. 31
Figure 26: Full UART (4-wire) Connectivity.........................................................................................32
Figure 27: Miscellaneous Peripherals ................................................................................................. 32
Figure 28: User LED and Software Trigger Circuit and Jumpers........................................................33
Figure 29: MikroBus 2 Circuit..............................................................................................................34
Figure 30: DA14531 PRO-DB Configuration and DA14531 PRO-MB Jumpers.................................36
Figure 31: BT1 Position (Left). Battery Holder, BC2032-F1, to Be Soldered (Right).......................... 38
Figure 32: DA14531 PRO-DB Schematic (Left). DA14531 PRO-MB, Header J4 Settings (Right)..... 38
Figure 33: BT1 Position on PRO-MB (Left). Battery Holder, BU2032SM-BT-GTR, to Be Soldered
(Right)..................................................................................................................................................39
Figure 34: Default Setup of the DA14531 DK PRO with DA14531 FCGQFN24 PRO-DB .................40
Figure 35: Default Setup of the DA14531 DK PRO with a DA14531 WLCSP17 PRO-DB.................42
Figure 36: Current Measurement Circuit of DA14531 PRO-MB ......................................................... 43
Figure 37: Current Measurement Presented in Power Profiler of SmartSnippets Toolbox ................ 44
Figure 38: SmartSnippets Toolbox Configuration ............................................................................... 45
Figure 39: Hybrid Configuration .......................................................................................................... 45
Figure 40: Power Profiler of SmartSnippets Toolbox Main Window ................................................... 46
Figure 41: Power Profiler Configuration..............................................................................................46
Figure 42: Power Profiler Chart Settings.............................................................................................47
Figure 43: Free Running Capture........................................................................................................ 47
Figure 44: Triggered Capture..............................................................................................................48
Figure 45: Oscilloscope Option ...........................................................................................................48
Figure 46: Power Profiler Software Cursors........................................................................................ 49
Figure 47: Setting Offset to Zero.........................................................................................................49
Figure 48: Measuring Offset................................................................................................................50
Figure 49: Setting Calibration Offset................................................................................................... 50
Figure 50: Current Measurement Circuit Response, Indicative Graph ...............................................51
Figure 51: Current Measurement Circuit Inaccuracy, Indicative Graph..............................................52
Figure 52: A/D Converter Distortions .................................................................................................. 53
Figure 53: Disable SW3. Remove Jumper from J19:4-5.....................................................................53
Figure 54: mikroBUS Wrong Label...................................................................................................... 54
Figure 55: Full UART Configuration - CTS Issue................................................................................ 55
Figure 56: Schematic, FCGQFN24, DA14531-00FXDB-P_(376-04-F2) ............................................ 56

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Figure 57: Components on Top and Bottom Sides for FCGQFN24, DA14531-00FXDB-P_(376-04-F2)
.............................................................................................................................................................57
Figure 58: Schematic, WLCSP17, DA14531-00OGDB-P_(376-05-E)................................................58
Figure 59: Components on Top and Bottom Sides for WLCSP17, DA14531-00OGDB-P_(376-05-E)
.............................................................................................................................................................59
Figure 60: DA14531 PRO-MB, headers and connectors....................................................................60
Figure 61: DA14531 PRO-MB, Current Measurement Circuit ............................................................61
Figure 62: DA14531 PRO-MB, JTAG MCU ........................................................................................ 62
Figure 63: DA14531 PRO-MB, USB Hub, USB to UART IC, and Power Section ..............................63
Figure 64: Components on Top Side of DA14531 PRO-MB............................................................... 64
Figure 65: System Configuration for DA14531 DK PRO with a DA14531 WLCSP17 PRO-DB
(Default)...............................................................................................................................................65
Figure 66: System Configuration for DA14531 DK PRO with a DA14531 FCGQFN24 PRO-DB
(Default)...............................................................................................................................................67
Figure 67: System Configuration for DA14531 DK PRO with a DA14531 WLCSP17 PRO-DB
(Default)...............................................................................................................................................69
Figure 68: Jumper Settings for PRO-MB (Marked in Red)..................................................................70
Figure 69: Resistor and Jumper Settings for DA14531 WLCSP17 PRO-DB......................................71
Figure 70: System Configuration for DA14531 DK PRO with a DA14531 FCGQFN24 PRO-DB
(Default)...............................................................................................................................................72
Figure 71: Jumper Settings for PRO-MB............................................................................................. 73
Figure 72: Resistor and Jumper Settings for DA14531 FCGQFN24 PRO-DB................................... 74
Figure 73: Resistor and Jumper Setting for PRO-MB (Top) and DA14531 PRO-DBs (Bottom) to
Support 2-Wire UART, JTAG, and 32.768 kHz Crystal.......................................................................76
Figure 74: Resistor and Jumper Setting for PRO-MB (Top) and DA14531 PRO-DBs (Bottom) to
Support Full UART AND JTAG............................................................................................................78
Figure 75: Configuring VLDO for 1.5V boost operation ......................................................................79
Figure 76: Using external power supply for 1.5V boost operation ......................................................79
Figure 77: Examples of SPI Flash power management using (top) analog switch (bottom) directly
GPIO....................................................................................................................................................80
Tables
Table 1: DK PRO part numbers and description................................................................................... 9
Table 2: PRO-MB to DA14531 Signal Correspondence and Function Multiplexing ........................... 23
Table 3: DA14531 WLCSP Signals Assignment................................................................................. 25
Table 4: DA14531 FCGQFN24 PRO-DB and PRO-MB Signals Assignment (Default)......................26
Table 5: Configuration Settings for JTAG In DA14531 DK Pro...........................................................28
Table 6: Configuration Settings for SPI Data Flash in DA14531 DK Pro............................................ 28
Table 7: UART Signals Assignment in DA14531 DK PRO................................................................. 29
Table 8: Single-wire UART Pin Assignment........................................................................................ 30
Table 9: 2-wire UART Pin Assignment................................................................................................ 31
Table 10: Full UART Pin Assignment..................................................................................................31
Table 11: Configuration settings for push buttons...............................................................................33
Table 12: Configuration settings for miscellaneous peripherals.......................................................... 33
Table 13: mikroBUS 2 Signals ............................................................................................................ 34
Table 14: Arduino Signals ...................................................................................................................35
Table 15: DA14531 DCDC Configuration and Input Voltage..............................................................37
Table 16: Jumper Settings for J9 ........................................................................................................ 37
Table 17: Accuracy of the Current Measurement Circuit .................................................................... 51
Table 18: DA4531 WLCSP17 PRO-DB Default Setup........................................................................ 66
Table 19: DA4531 FCGQFN24 PRO-DB Default Setup ..................................................................... 68
Table 20: Pin Assignment for DA14531 WLCSP17 PRO-DB............................................................. 69
Table 21: Pin Assignment for DA14531 FCGQFN24 PRO-DB........................................................... 69
Table 22: The Components for DA14531 DK PRO in WLCSP17 Package........................................70
Table 23: The Components for DA14531 DK PRO in FCGQFN24 Package .....................................73
Table 24: Pin Assignment for DA14531 WLCSP17 PRO-DB............................................................. 75

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Table 25: Pin assignment for DA14531 FCGQFN24 PRO-DB........................................................... 75
Table 26: The Components for the Two Packages to Support 2-Wire UART, JTAG, and 32.768 kHz
Crystal..................................................................................................................................................75
Table 27: Pin Assignment for DA14531 WLCSP17 PRO-DB............................................................. 77
Table 28: Pin Assignment for DA14531 FCGQFN24 PRO-DB........................................................... 77
Table 29: The Components for the Two Packages to Support Full UART and JTAG........................ 77

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1 Terms and Definitions
UART Universal Asynchronous Receiver Transmitter
GPIO General Purpose Input Output (pin)
JTAG Joint Test Action Group
RF Radio Frequency
IC Integrated Circuit
PCB Printed Circuit Board
PCBA Printed Circuit Board Assembly
SoC System on Chip
SWD Serial Wire Debug
DK Development Kit
PRO-DB PRO daughterboard
PRO-MB PRO Motherboard
FCGQFN24 PRO-DB PRO daughterboard with DA14531 - FCGQFN24
WLCSP17 PRO-DB PRO daughterboard with DA14531 - WLCSP17
OTP One-Time Programmable Memory
2 References
[1] DA14531, Datasheet, Dialog Semiconductor.
[2] UM-B-083, SmartSnippets Toolbox User Manual, User Manual, Dialog Semiconductor.
[3] AN-B-075, DA14531_Hardware_Guidelines, Application Note, Dialog Semiconductor.
[4] UM-B-151, Extending Flash Support for DA14531, User Manual, Dialog Semiconductor.

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3 Introduction
This document describes the hardware of DA14531 development kit (DK) PRO. It supersedes the
older DA14580/5 DK PRO, providing a richer feature set and an improved performance. The
DA14531 DK PRO motherboard fully supports DA14585/6 daughterboards, and the DA14531 DK
PRO daughterboards are backwards compatible with the older DA1458x DK PRO motherboard.
However, for a better development experience and a full feature support, it is recommended to use
the newer DA14531 DK PRO motherboard.
In this document we focus on the DA14531 DK PRO which consists of the following two parts:
●PRO-Motherboard
○PRO-MB: PCBA reference number 376-18-B
●PRO-daughterboard (PRO-DB) (two options, interchangeable)
○FCGQFN24 PRO-DB: it uses DA14531-FCGQFN24. PCBA reference number 376-04-F,
○WLCSP17 PRO-DB: it uses DA14531-WLCSP17. PCBA reference number 376-05-E.
Figure 1 and Table 1 present the part numbers (also ordering code) for the DK PRO
DA14531-00FXDEVKT-P
PRO-MB
376-18-B
DK PRO
Figure 1:DK PRO, DA14531-00FXDEVKT-P DK with PRO-MB and the PRO-DBs

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Table 1: DK PRO part numbers and description
Part number
Description
DA14531-00OGDB-P
WLCSP17 PRO-DB.
Bluetooth Low Energy DA14531 WLCSP17 PRO-daughterboard
DA14531-00FXDB-P
FCGQFN24 PRO-DB
Bluetooth Low Energy DA14531 FCGQFN24 PRO-daughterboard
DA14531-00FXDEVKT-P
DK-PRO
Bluetooth Low Energy Development Kit Pro for DA14531, including PRO-MB
and PRO-DB.
NOTE
When DA14531-00FXDEVKT-P is ordered, the user gets a set of PRO-MB and a FCGQFN24 PRO-DB.
Daughterboard WLCSP17 PRO-DB must be ordered separately.
A single PRO-MB cannot be ordered.
The following sections guide users to understand the system setup, the different available
configuration options, as well as the tools provided to debug, develop, and evaluate the system
performance.

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3.1 System Overview
PRO-MB
PRO-DB
UART
bridge
DA14531
BUCK
BOOST
Bypass
Flash
memory
(2Mbit)
32M
3V3
UART
JTAG
RST
VLDO
1.1/1.8/
3.0/3.3V
SMA
JTAG
(SWD)
interface
USB
HUB
Current Sense
circuitry
5V
PRO-MB
LDO
1.1V
R-Multiplexer
Pwr Sw
32K
DA14531
PRO-DB
Level
Translate
J5 J4
SW2 SW3
Mikrobus 1
Mikrobus 2
Arduino
socket
SPI
SW1 D5
UART
JTAG
P2_x
P3_0,1
SPI
MINI B
USB
USB1
V3
V1 SW1
LPF
Config. Header (J1)
Breakout Header (J2)
PCI-e connector (J3)
Figure 2: Block Diagram of the DA14531 DK PRO Hardware Platform
3.1.1 Features of DA14531 PRO-DB
●Embedded printed antenna
●RF port output (connector not included)
●DA14531 power mode configuration switch (only for backwards compatibility with DA1458x DK
PRO motherboard)
●Current measurement port to connect external measurement equipment
●Onboard JTAG connector
●Support for coin cell battery (battery holder not included)
3.1.2 Features of DA14531 PRO-MB
●A slot to connect a DA14531 PRO-DB which hosts either the DA14531-FCGQFN24 or the
DA14531-WLCSP17 SoC
●All the power wiring configurations to allow DA14531 PRO-MB to operate in either Buck, Boost,
or Bypass mode
●Dedicated hardware for current measurement that enables Dialog’s SmartSnippets Toolbox
power profiler software as well as any externally connected power measurement device to profile
the power consumption of the system
●Single USB port to provide power and data interfacing to a PC (USB1)
●Onboard JTAG debugger
●Virtual 4-wire UART port
●The DA14531 RESET line is controlled over JTAG by using an onboard push button
●Onboard 2-Mbit SPI data Flash (MX25R2035)
●Multiple voltage options (1.1 V, 1.8 V, 3.0 V, and 3.3V) to supply the DA14531 SoC on the
DA14531 PRO-DB
●Support for coin cell battery (battery holder not included)
●User LEDs and push buttons (to be used with a DA14531 FCGQFN24 PRO-DB)
●Voltage translation for the JTAG and UART signals that allows the current leakage during system
operation to be eliminated

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4 Getting to Know DA14531 DK PRO
4.1 DA14531 PRO-DB
The system on DA14531 PRO-DB consists of the DA14531 SoC, crystals, power section, and radio
section. The system block diagram and the actual components location are presented in Figure 3,
Figure 4, and Figure 5.
U1
DA14531
BUCK
BOOST
Bypass
32M
J3
SMA
U2
LDO
1.1V
R-Multiplexer
Pwr Sw
32K
rst
SW1 Y2
Y1
V3
J2
ANT1
V1
LPF
UART
JTAG
P2_x, P3_0,1
spi
VBAT_Hi
VBAT_Lo
J1-mating connector on PCB
R33
2.2uH
10u
2.2u
For DA145xxDEVKT-P
PRO-MB, set SW1 on
BUCK position
Not Mounted
Figure 3: System Block Diagram of DA14531 PRO-DB
ANT1
PCB ANTENNA
R-Multiplexer J4
Debug
U1
QFN24
Y2
Y1
32MHz L1, 2.2μH
CLC
Matching
J3
SMA
J2 – Power
Measurements SW1
U2
LDO
1.1V
J1 – Mating Connector
Figure 4: DA14531-00FXDB-P, FCGQFN24 PRO-DB_[376-04-F]

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ANT1
PCB ANTENNA
R-Multiplexer J4
Debug
U1
Y2
Y1
32MHz L1,
2.2μH
CLC
Matching
J3
SMA
J2 – Power
Measurements SW1
U2
LDO
1.1V
J1 – Mating Connector
Figure 5: DA14531-00OGDB-P, WLCSP17 PRO-DB_[376-05-E]
●BLE SoC (U1): DA14531 is an ultra-low power SoC integrating a 2.4 GHz transceiver and an
ARM CortexM0+TM microcontroller with 48 kB of RAM and 32 kB of One-Time Programmable
memory (OTP).
●32 MHz XTAL (Y1): The main clock of the system is generated from a 32 MHz XTAL which is
connected to the internal clock oscillator. The selected crystal for this reference is the
XRCGB32M000F1H00R0 of Murata.
●32.768 kHz XTAL (Y2, not assembled by default): A crystal of 32.768 kHz can be placed on
the pins P0_3 and P0_4 of DA14531. A crystal that can be used is the SC20S-7PF20PPM of
SEIKO Instruments.
In most applications the DA14531 can run with good accuracy with its internal RC oscillator
(RCX) and therefore the XTAL32k is not needed. For applications with more demanding
accuracy/drift characteristics, such as timekeeping, using the XTAL32k is considered as a
suitable solution.
By default, Y2 is not assembled on PRO-DB. Internal RC clock is used. P0_3 and P0_4 are
assigned to other SPI data flash (mounted on PRO-MB).
For assembling and utilizing Y2, refer to Appendix F.
●RF section: see section 4.1.2.
●R-Multiplexer: A group of 16 resistors of 0 Ωcan be placed/removed as needed in order to
hardwire various peripherals to the DA14531 pins as desired (Appendix D).
To complete a configuration, it is necessary to set/remove jumpers on the DA14531 PRO-MB
accordingly. The default settings are presented in section 5.

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4.1.1 Power Section
The power circuit of DA14531 PRO-DB is designed to support two generations of PRO-MBs:
●PRO-MB: there is no need for the additional circuit. The DCDC power configuration and the
voltage applied to DA14531 SoC are arranged on the PRO-MB (see section 6). In this case, SW1
must be always set to BUCK position.
●In this document the operation with DA14531-00FXDEVKT-P is presented.
U1
DA14531
BUCK
BOOST
Bypass
U2
LDO
1.1V
Pwr Sw
SW1
J2
VBAT_Hi
VBAT_Lo
R33
2.2uH
2.2u
10u
SW1 set to
BUCK Mode
Not
Mounted
V3
V1
NP
PRO-DB
376-04-x
376-05-x
J1-mating connector on PCB
C1
C2
L1
VBAT
Vin
VH-
VL-
Figure 6: DA14531 PRO-DB Power Section
Components:
●U2:it is an LDO which generates VLDO = 1.1 V. U2 is supplied from Vin voltage rail and it is
enabled only when SW1 is set for Boost mode. Please notice that the quiescent current of U2 is
measured from the power measurement of PRO-MB. It is disabled for the use with PRO-MB.
●J2: it is used for connecting external power measurement equipment. For current measurements
of sub-μΑ range, users can insert an external equipment. When no external equipment is applied,
jumpers must be applied between 1 and 2 as well as between 4 and 5.
●L1: inductor for the DA14531 DCDC converter in Buck or Boost mode of operation.
●C1: input capacitor for buck mode and output capacitor for boost mode. As input capacitor this
must be equal to 2.2 µF. As an output capacitor, the effective capacitance must be at least 1 μF.
●C2: input capacitor for boost mode and output capacitor for buck mode. For the PRO-
daughterboard, this capacitor is set to 10 μF.
●SW1: it is a power switch of three positions. Settings:
○Setting SW1 to position H (Buck) connects the VBAT_High and VBAT_Low pins of DA14531 to the
voltage rails V1 and V3 of the PRO-MB
○Setting SW1 to position B (Bypass) connects both VBAT_High and VBAT_Low pins of DA14531 to
the voltage rail V3 of the PRO-MB
○Setting SW1 to position L (Boost) connects the VBAT_Low pin of DA14531 to the voltage rail
generated from U2 on the PRO-DB
○For DA14531-00FXDEVKT-P, SW1 must be set to H position (Buck)

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J2 BUCK
GND
VL
VH
VBAT
U2
L1
C2
C1
U1
Figure 7: Power Section of DA14531 PRO-DB

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4.1.2 RF Section
A printed F-antenna (ANT1) is used as the radiating element for the DA14531 PRO-DB.
The DA14531 RFIO pin is connected to the printed antenna through a RF stripline and a matching
circuit.
To conduct RF measurements, please proceed with the following hardware modifications (Figure 9):
●Remove Z9
●Assemble Z7 = 10 pF
●Assemble J3, SMA Female Socket 50 ΩBoard Edge (142-0761-861of Cinch Connectivity
Solutions Johnson)
Figure 8: RF Section of DA14531 PRO-DB
Figure 9: Modifications Required for Performing RF Measurements

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4.2 PRO-MB (376-18-B)
The block diagram and the actual component locations of the PRO-MB of DA14531-00FXDEVKT-P
DK PRO are presented on Figure 10 and Figure 11, respectively.
Figure 10: DA145xx DEVKT-P PRO-MB Block Diagram
PRO-DB
Mating header
(J3)
Push Button
Selection header
(J19)
Configuration Header
(J1)
Current
Sense
(J9)
JTAG MCU
(U4)UART
MCU
(U12)
Voltage
Translator
FLASH
(U2)
VLDO (U5)
VLDO
Selection
(J5)
USB
Connector
(USB1)
GND
GND
GND
User LED &
SW Trigger
(J8)
RESET
Push Button
(SW1)
DA145xx GPIO
Monitoring Header
(J2)
Dialog
Semiconductor
PCB Number
MIKROBUS 2
(J17, J18)
MIKROBUS 1
(J15, J16)
ARDUINO
(J11, J12, J13,
J14)
KEYS
(SW2 & SW3)
DA14531 DCDC
config selection
(J4)
USB HUB
(U11)
Current
Sense Circuit
Figure 11: PRO-MB (376-18-x)
U12
FTDI
UART
U2
Flash
MX25R2035
3V3
24M
UART
JTAG
RST
VLDO
U4
MCU
with
Segger
JTAG
U11
USB
HUB
Current Sense
circuitry
12M
24M
5V
27M
DA145xxDEVKT-P PRO-MB
J1
Level
Translation
J5 J4
SW2 SW3
Mikrobus 1
Mikrobus 2
Arduino
socket J3
J2
SPI
SW1 D5
MINI B
USB
USB1
V3
V1

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●USB Hub (U11): connects JTAG and UART interfaces to the PC.
●USB to UART (U12): provides communication between DA14531 UART port and PC. It also
transfers the current measurement samples to PC.
●USB to JTAG (U4): provides communication between DA14531 JTAG and PC.
●USB Connector (USB1): mini-USB connector for power supply and data interfacing to the PC.
●Configuration Header (J1): wiring of the available peripherals to the DA14531 pins is done with
the help of jumpers on J1 (for default configurations) or with jumper wires from J1 to J2 when
custom pin assignments of the peripherals to DA14531 pins are desired.
●DCDC Configuration (J4): selects either Boost, Buck, or Bypass mode for DA14531.
●PRO-DB Mating Header (J3): a connector that accepts the DA145xx PRO-DB board.
●Push Button Selection Header (J19): configures the assignment of onboard push buttons to
certain DA14531 pins.
●Reset Push Button (SW1): push button used to reset DA14531.
●User LED and C-Trig (J8): enables use of the onboard LED (D5) and the software cursor, see
section 5.3.6
●GPIO Monitoring Header (J2): exposes all the pins of the PRO-DB to allow wiring for custom
configurations as well as monitoring of the hardware signals.
●ARDUINO: socket for plugging in an Arduino board. It consists of J11, J12, J13, and J14. It is
multiplexed with mikroBUS (to be used with DA14531-FCGQFN24).
●MikroBUS1 (J15 and J16): the first socket for plugging a mikroBUS click.
●MikroBUS2 (J17 and J18): the second socket for plugging a mikroBUS click.
●Push Buttons (SW2 and SW3): general use push buttons.
●VLDO Selection (J5): selects the output voltage generated for the PRO-DB board (1.1 V, 1.8 V,
3.0 V, or 3.3 V)
●Current Sense Circuit: monitors the current of PRO-DB. It is described in section 8.1.
●Current Sense (J9): enables the current sense circuit (jumpers mounted by default). Also, it
allows the simultaneous connection of an external current measurement instrument in order to
measure and profile the current consumption of D14531.
●RxTx Single Wire UART (J10): Generates RxTx single wire UART by shorting UTX and URX
through a 1 KΩresistor. Jumpers must be applied to from J10.1 to J1.15 and to from J10.2 to
J15.17.
●J6: manual enable of USB hub voltage regulator. Not in use by default.
●J20: monitoring current sense circuit. Not mounted. No functional use.
●J22: it can provide 6.0 V to PRO-DB. Not mounted. No functional use.

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4.2.1 USB HUB (U11)
The USB HUB of DA14531 PRO-MB is implemented by U11, USB2512B. This chip is supplied with
3.3 V from U13.
The signal PWR_ENABLE is generated from U11 and it is an active high signal. It enables the power
components (LDOs and DCDC converter) for UART, JTAG, and the current sensing circuit. The
system will power up only after the USB HUB has enumerated properly.
Its operation is indicated via the green LED D4 on DA14531 PRO-MB. A 24 MHz crystal (Y3) is
required for the chip operation.
Figure 12: USB HUB Circuitry of DA14531 PRO-MB
4.2.2 USB to UART (U12)
The USB to UART function is implemented by U12, FT2232HL. This chip is supplied with 3.3 V from
U14. A 12 MHz crystal (Y4) is required for the chip operation.
Functions served by U12 are the following:
●Connecting a PC to the UART port of DA14531 SoC
●Connecting a PC to the current sensing circuitry:
○SPI connection with ADC (U8)
○Software cursor triggering (C_TRIG)
●Reset capability of the DA14531 SoC through the T_RESET signal (not enabled)
R55 330
TP74
VBUS1
USBDP
R49 100.0K
R50 100.0K
TP20
PWR_EN
R56 100.0K
C59
100nF
C63 18pF R60 10.0k
C66
100nF
R66 10.0k
USB2512B-AEZG
U11 USBDM_DN1 1
USBDP_DN1 2
USBDM_DN2/PRT_DIS_M2 3
USBDP_DN2/PRT_DIS_P2 4
VDD33_1 5
NC1
6
NC2
7
NC3
8
NC4
9
VDD33_2 10
TEST
11
PRTPWR1/BC_EN1 12
OCS_N1
13
CRFILT 14
VDD33_3 15
PRTPWR2/BC_EN2 16
OCS_N2
17
NC5
18
NC6
19
NC7
20
NC8
21
SDA/NON_REM1/SMBDATA 22
VDD33_4 23
SMBCLK/CFG_SEL0/SCL 24
HS_IND/CFG_SEL1 25
RESET_N
26
VBUS_DET
27
SUSP_IND/LOCAL_PWR/NON_REM0 28
VDD33_5 29
USBDM_UP
30
USBDP_UP
31
XTALOUT
32
XTALIN/CLKIN
33
PLLFILT
34
RBIAS
35
VDD33_6 36
GND
GND
Y3
24.0000MHZ
C62
100nF
R46
10.0k
D4
Led_Green
2 1
R59 NP
R64 NP
R48
100.0K
L1
CMC 400MA
1 4
2 3
R47
100.0K
C56
100nF
C64 18pF
R58 10.0k
C65
1.0uF
R51
100.0K
R62 NP
VDD_3V3_HUB
VBUS_HUB
VDD_3V3_HUB
VBUS_HUB
R124 NP
USBDM USBDM_2
USBDP_2
USB HUB
R129 1.00K
C58
100nF
1
2
3
4
5
USB1
USBDP_1
USBDM_1
D7
PRTR5V0U2X,215
GND 1
IO1 2 IO2
3
VCC
4
TP36
USBLED
C73
100nF
C69
100nF C72 100nF
C68
100nF C70 100nF C71 100nF
VDD_3V3_HUB
R54 12.0k
PWR_ENABLE
C57
4.7uF

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Figure 13: USB to UART (U12)
4.2.3 USB to JTAG (U4)
The USB to JTAG function is implemented by U4, SAM3U2CA. On the ROM of U4, software from
SEGGER is loaded. Its operation is indicated via the green LED D2 on the DA14531 PRO-MB. This
chip is supplied with 3.3 V from U14. U14 is enabled by the PWR_ENABLE signal.
Functions served by U4 include:
●Connecting a PC to the JTAG port of DA14531 SoC
●Reset capability of the DA14531 SoC through the T_RESET signal
OSC_EN
TP58
OSC_EN
R152 51 TP64
BCBUS5
TP59
BCBUS7
R114 51
R61 51 AD_SCLK
R63 51 AD_DI
AD_MODE
AD_DO
R68 51
AD_SYNC
R67 51
Y4
12.0000MHZ
R81 NP
C74
18pF
C67
18pF
C55
100nF
C54
10uF
T_RESET
C46
100nF
C45
10uF
3.3V
3.3V
LP6
500mA_470 OHM C48
100nF
C47
100nF C49 100nF
VREG
C50
100nF C51 100nF C52 100nF C53 100nF
R65
1.00K AD_DRDY
3.3V
R82 51
3.3V
C61
4.7uF
C60
100nF
R52 33
R53 33
TP18
VREG
R57
12.0k
LP7
500mA_470 OHM
U12
FT2232HL
VPHY 4
OSCO
3OSCI
2
AGND
10
DM
7
DP
8
TEST
13
VPLL 9
VCORE 12 VCORE 37 VCORE 64
VCCIO 20 VCCIO 31 VCCIO 56 VCCIO 42
GND
1
GND
5
GND
11
GND
15
GND
25
GND
35
GND
47
GND
51
ADBUS0 16
ADBUS1 17
ADBUS2 18
ADBUS3 19
ADBUS4 21
ADBUS5 22
ADBUS6 23
ADBUS7 24
ACBUS0 26
ACBUS1 27
ACBUS2 28
ACBUS3 29
ACBUS4 30
ACBUS5 32
ACBUS6 33
ACBUS7 34
BDBUS0 38
BDBUS1 39
BDBUS2 40
BDBUS3 41
BDBUS4 43
BDBUS5 44
BDBUS6 45
BDBUS7 46
BCBUS0 48
BCBUS1 52
BCBUS2 53
BCBUS3 54
BCBUS4 55
BCBUS5 57
BCBUS6 58
BCBUS7 59
VREGIN
50
VREGOUT
49
RESET
14
PWREN 60
SUSPEND 36
EECS
63
EECLK
62
EEDATA
61
REF
6
U_CTS
U_RTS
U_TX
U_RX
To
voltage
translator
(UART)
To U11
USB HUB To current
sense
USB SERIAL/SPIINTERFACE

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Figure 14: USB to JTAG (U4)
4.2.4 Voltage Translator
●Voltage translation is applied to the UART and JTAG signals. The voltage translation is from 3.3
V to VDDIO and vice versa.
●VDDIO is generated from U1A, where V3 (VBAT_HIGH) is used as a reference. Consequently, there is
no additional power consumption on the power circuitry of DA14531 PRO-MB due to voltage
translation.
Figure 15: Voltage Translator Circuitry of DA14531 PRO-MB
R8 150
R12
10.0k
TP1
VDD_CR
C6
100nF
R11
10.0k
LP2
500mA_470 OHM
VBUS_HUB
R14 150
R10
10.0k
C18 18pF
C7
100nF C8 100nF
TP3
C16 10nF
C17 18pF
TP9
DBLED
C9
100nF
R13
100.0K
C10
100nF
TP8
C11
100nF
R19 39
C14
10uF
R21
6.8k C19 10pF
C12
100nF
R20 39
C15
10uF
TP6
C13
100nF
J7
TagConnect
1 2
3 4
5 6 TP7
TP10
TP5
TFBGA-100
ATSAM3U2CA-CU
U4
XIN
A2
XOUT
A3
XIN32
A10
NRST
B7
XOUT32
B10
TMS/SWDIO
C7
NRSTB
C8
JTAGSEL
C9
TST
D7
FWUP
D8
TCK/SWCLK
A7
TDO/TRACESWO
B8 TDI
B9
ERASE
D6
VBG
A1 DFSDP
C1 DHSDP
C2
VDDBU C10
DFSDM
D1 DHSDM
D2
VDDPLL D3
VDDCORE1 D4
VDDIO3 E6
VDDCORE2 E7
VDDIO1 F3 VDDIO2 F5
VDDCORE4 F9 VDDCORE5 G5 VDDCORE6 H1
ADVREF J3
VDDANA K2
AD12BVREF K4
PB17 A4
PB21 A5
PB23 A6
VDDIN A8
VDDOUT A9
VDDCORE3 B1
GNDUTMI
B2
VDDUTMI B3
PB10 B4
PB18 B5
PB24 B6
GNDPLL
C3
PB14 C4
PB19 C5
PB22 C6
PB20 D5
PA11/PGMD3/URXD D9
PA12/PGMD4/UTXD D10
PA29 E1
GND2
E2
PA28 E3
PB9 E4
GNDBU
E5
PA10/PGMD2 E8
PA9/PGMD1 E9
PA8/PGMD0 E10
PB1 F1
PB12 F2
PA31 F4
GND1
F6
PB16 F7
PA6/PGMM2 F8
PA7/PGMM3 F10
PB11 G1
PB2 G2
PB0 G3
PB13 G4
GND3
G6
PB15 G7
PA3/PGMNVALID G8
PA5/PGMM1 G9
PA4/PGMM0 G10
PB5 H2
PA27 H3
PA22/PGMD14 H4
PA13/PGMD5 H5
PA15/PGMD7 H6
PA18/PGMD10 H7
PA24 H8
PA1/PGMRDY H9
PA2/PGMNOE H10
PB6 J1
PB8 J2
PA30 J4
PB3 J5
PA16/PGMD8 J6
PA19/PGMD11 J7
PA21/PGMD13 J8
PA26 J9
PA0/PGMNCMD J10
PB7 K1
GNDANA
K3
PB4 K5
PA14/PGMD6 K6
PA17/PGMD9 K7
PA20/PGMD12 K8
PA23/PGMD15 K9
PA25 K10
VDD_3V3_PERF
VDD_CORE VDD_3V3_PERF
VDD_3V3_PERFVDD_CORE
VDD_CORE
VDD_3V3_PERF
VDD_3V3_PERF
TP4
XOUT
USB_DP
PA15
PA18
VDD_3V3_PERF
DFSDM
PA22
DFSDP
VBG
TDIin
PA29
PA4
To VDDBU NRSTB
FWUP
TCK/SWCLK
TRSTout
TRSTin
PA17
TDIout
TRSTout
TRSTin
Needed for Segger software
NRST
TDIout
TDIin
NRST
TDI
For programming SAM3U2C
ERASE
XIN
SWO/TDO
A_D4_2
NRST
TP76
SWDIO
TP77
SWCLK
D2
Led_Green
21 R18
330
TMS/SWDIO T_SWCLK
T_SWDIO
T_RESET
R9
150
USBDP_1
USBDM_1
Y1
12.0000MHZ
R16 150 R17 100
R15 100