The DA1453x Development Kit box, introduced simultaneously with the DA14535 SOC, is a newer version compared to the DA14531 Development box.
Inside the development box, you can find a DA1453x DEVKT-P Motherboard and a
DA14535 Daughterboard featuring the DA14535 SoC of the desired package QFN24.
Incompatibility
DA1458x (DA14585 and DA14586) is not compatible with DA1453x DEVKT-P Motherboard.
The motherboard provides the necessary hardware to enable:
Full digital connectivity with external hardware using UART, SPI, GPIO, and I2C
USB-based debugging capabilities using the SEGGER J-Link on-board debugger
USB-based UART communication with the host PC using a Future Technology Devices International (FTDI) chipset
that converts UART to USB signal.
Which daughterboards are supported?
All daughterboards of the DA1453x family are compatible with the DA14531 DEVKT-P Motherboard. This motherboard has now been superseded with the new model DA1453x DEVKT-P Motherboard. The main difference is the new and more accurate power measurement circuitry. When you order DA14535 Development Kit, the new motherboard is shipped by default.
The DA1453x development box includes a Power Measurement Module (see J7 in Figure 9). PMM2 is an external add-on board that connects to the DEVKIT-P Motherboard via connector J7.
This module offers a range of features, including:
A full-scale measurement range of 500 mA at 3.3 V
High-precision measurements down to 1 uA.
Another significant difference between the DA14531 and DA1453x DEVKIT-P Motherboard is the debugger. In the DA1453x DEVKIT-P Motherboard, the debugger U25 has been replaced with RA4M2. Additionally, it is worth noting that Mikrobus1, which was previously found on the DA14531 DEVKIT-P Motherboard, is no longer included in the DA1453x DEVKIT-P Motherboard. This change is due to the incompatibility between this motherboard and DA1458x family.
The Power mode selection should be done on J4 on DA1453x DEVKIT-P Motherboard considering the jumper structure printed on the motherboard, see Figure 9.
Make sure to configure this jumper for BUCK mode while downloading the program. Note that the J4 configuration has been made by default for BUCK mode and this note is only related to downloading step.
R-Multiplexer
The DA14535 daughterboards come with a default resistors (R-Multiplexer) configuration. This is a group of 16 resistors of 0 Ω that can be placed/removed in order to hardwire various peripherals to the DA14535 pins (from J1 or J2 ) as desired.
Extra Guideline
Application Note (AN-B-099) contains guidelines to implement a RFIO filter that serves to reduce conducted and
radiated spurious emissions in Bluetooth® low energy applications.
4.4. Configure the DEVKIT-P Motherboard with Jumper Settings
Figure 9 shows the layout of the headers and its descriptions on the DA1453x DEVKIT-P Motherboard in Table 2.
Configuration header. SPI data flash, UART modes, JTAG, and Reset functions are enabled
J2
GPIO Break out header
J24
Software trigger
J8
T_RST (reset from J-Link), LED
J19
Enable user push buttons, SW2 and SW3
J9
Enable current sense circuit. Also, it
allows the simultaneous connection of an external current measurement instrument
J5
VLDO output voltage selection
J4
DCDC Configuration: select either Boost, Buck, or Bypass mode
J7
Current measurement Socket
J23
Reset options
Warning
Do not remove J8 jumper. The J8 (pin 1-2) is no longer an user jumper (J8 is the reset sourced from RA4M2). Removing this jumper will cause the J-link reset to be high always, considering this point and placing J23 (pin 2-3)
will cause VLDO to be cut from the daughterboard.
The DEVKIT-P Motherboard comprises essential components for seamless development:
FTDI Chipset U12: This chipset, represented by the FT2232HL, plays a crucial role in facilitating USB communication with the development host. It serves as a USB to UART bridge, establishing a seamless connection between the PC and the DA14535 SoC UART port. Additionally, it interfaces with the current sense circuitry through an SPI connection with ADC U8.
Power Supply (U5): U5 is responsible for providing a stable 3.3 V supply to power the FT2232HL chipset, ensuring its proper operation. Iti s worth noting that the chipset’s functionality relies on the presence of a 12 MHz crystal (Y1).
Embedded J-Link Debugger U25 (RA4M2): The embedded J-Link debugger, U25, is a valuable tool for debugging your development projects. It operates on a 3.3 V power supply from U5 and is enabled by the PWR_ENABLE signal.
Before connecting your ProDev Kit to the host PC, ensure that you have established the correct connections between the motherboard and your chosen daughterboard module. You have the flexibility to power the kit using either 3.3 V via USB (USB1) or VDD (a coin cell). When using a mini-USB cable, there is no need for an additional battery. To establish a connection, simply attach a standard mini-USB cable to the USB1 connector. For visual reference, see Figure 12.
