5. DA1469x – The hardware

The DA14695 ProDK (DA14695-00HQDEVKT-P) consists of a DA1469x main board and a DA14695 daughter board (DA14695-00HQDB-P). A DA14699 daughter board is also available (DA14699-00HRDB-P). More details about the DA1469x product family is shown in Figure 1.

Figure 1 The DA1469x Product Family

5.1. The ProDK main board

Figure 2 illustrates the physical layout of the DA1469x main board. The daughter board containing the DA14695 device is shown in Figure 4.

The ProDK main board provides all necessary hardware to enable:

• Full functional verification of the DA1469x product family with the ability to take precise power measurements by isolating the DA1469x device.

• Full digital connectivity with external hardware using UART, SPI and I2C.

• USB based debugging capabilities using the SEGGER J-Link on-board debugger for Cortex M33.

• USB based UART communication with the host PC using a Future Technology Devices International (FTDI FT2232H) chipset which converts UART to USB.

Figure 2 The DA1469x main board

Table 1 The DA14695 ProDK main elements

Reference	Description
1	U12: FTDI Chip
2	User button (K1)
3	Arduino sockets
4	Trimmer to define the adjustable LDO voltage (R127)
5	USB connector for power and communication interface
6	mikroBUS™ sockets
7	(J8.1-2) for enabling user button and (J8.3-4) for Software trigger header
8	Signal/Power breakout headers (J3, J4): Refer to Appendix A
9	DIP switch (S1) connecting the debugging interface signals (JTAG/UART)
10	(J9.1-2: Input) and (J9.3-4: Output) for Header for current measurement circuit
11	LRA/ERM interface header
12	J1/J2 Daughter Board connectors

Note

J3 and J4 (Reference 8 in Figure 2) are the Breakout Headers (2 pcs 2x20pin) for monitoring GPIO and power signals, with markings of signal names on the PCB top silkscreen.

Note

For current measurement circuit by SmartSnippets Toolbox (driven from a DA1469x GPIO, P0_16 ) you should power the main board by the USB connector.

5.2. The ProDK daughter board

The ProDK main board can be combined with the daughter board as shown in Figure 6.

Both the main board and the daughter board have alignment arrows printed to indicate the proper combination of the two boards, as shown in Figure 3.

Figure 3 Main board - daughter board alignment

The DA14695 daughter board layout is presented in Figure 4.

Figure 4 The DA14695 daughter board Layout

Table 2 DA14695 Daughter Board main elements

Reference	Description
1	U1: DA14695 in micro-BGA package
2	USB connector, alternative power option and connecting to DA14695 USB pins
3	U2: QSPI Flash (MX25U3235F :32Mbit)
4	Printed RF antenna
5	J4: Debug
6	Power Select
7	Reset
8	Y1 : Crystal 32 MHz
9	Y2 : Crystal 32.768 KHz
10	J7: Coaxial switch for conducted RF measurements

Note

The daughter board has a switch (reference 6 in Figure 4) to select the power supply for the device:

• Power switch pos1 (left-default): VBAT LDO (default, this is the only option where the current is monitored by SmartBond™ Studio - Toolbox)

• Power switch pos2 (right): Battery, Li-Ion (default) or Coin Cell

Note

The daughter board has the possibility to operate stand-alone (without the main board), powered from one of these options:

• Li-Ion/LiPo/coin Battery

• USB connector

• CIB interface (providing also JTAG/UART debugging functions)

5.3. Configuring the Pro Kit main Board by Jumper Settings

The jumper settings are displayed below:

Figure 5 ProDK Development Kit Jumper settings

Table 3 Default jumper settings

Jumper	Default Position	Comment
J5	2-3	Selects 3.0V as default VBAT
J6	Not Placed	2-pin connector for Li-Ion/LiPo Battery/
J8	1-2 & 3-4	button (K1) and C_TRIG
J9	1-2 & 3-4	Current measurement input and output
J10	no jumper caps	Haptic driver outputs and ground

Note

The schematic diagrams, BOM, and Gerber files are illustrated in detail in the Development Kit Documentation.

5.4. Connecting the ProDK to the host PC

The ProDK Development Kit allows functional verification of the DA1469x family of devices. It supports connecting external hardware by exporting DA1469x pins to standard headers and enables the user to do precise power measurements through the integrated power measurements circuitry.

The ProDev Kit motherboard also includes :

• An embedded J-Link debugger U4 SAM3U2CA which ensures the USB to JTAG function by loading the software from Segger to the ROM of U4. The chip is supplied with a 3.3V from U14 which is enabled by PWR_ENABLE signal.

• FTDI chipset U12 FT2232HL which allow easy communication with the development host over USB. The FT2232HL implements the USB to UART function and ensure the connectivity of PC to the DA1469x SoC UART port and to current sense circuitry through SPI connection with ADC. The chip is supplied with a 3.3V from U14. A 12MHz crystal Y4 is required for the chip operation.

The ProDK Development Kit is connected to the host PC over the connector marked as USB1, as shown in reference 6 in Figure 2 and Figure 6 using a standard mini-USB cable. For further reading you can refer to the Application Note: AN-B-066 DA1469x Application Hardware Design Guidelines and UM-B-093 The hardware of DA1469x Development kit

Note

Before connecting the ProDK Development Kit to the host PC make sure that :

• The main board and the desired daughter board module are properly connected.

• The power switch on the daughter board is in the left position (VBAT) to select USB from motherboard.

Figure 6 Connecting the ProDK to the host PC