UM-B-114
DA14531 Development Kit Pro Hardware User Manual
User Manual
Revision 1.4
23-Apr-2020
12 of 82
© 2021 Dialog Semiconductor
ANT1
PCB ANTENNA
R-Multiplexer
J4
Debug
U1
Y2
Y1
32MHz
L1,
2.2
μH
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 CTM 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
●
RF section:
see section
●
R-Multiplexer:
A group of 16 resistors of 0
Ω can be placed/removed as needed in order to
hardwire various peripherals to the DA14531 pins as desired (
To complete a configuration, it is necessary to set/remove jumpers on the DA14531 PRO-MB
accordingly. The default settings are presented in section
