2. Prologue

The DA1459x can source code from three different locations. It can be either source code from internal eFlash, an attached QSPI flash device or a serial port (UART).

The DA1459x family can load firmware from a serial interface with an image size of up to 128 kbytes. This document covers the requirements for loading code through the serial port and starting to execute it.

3. Booting

3.1. Booting sequence

The DA1459x booting sequence is described in Figure 2. In this document we will detail the procedure in the box “Get FW From UART” in the “Retrieve Application Code” section of the booting procedure.

3.2. Interface

The DA1459x boot on a unique UART serial interface. The UART configuration is the following:

  • DA1459x Tx pin: P0_13

  • DA1459x Rx pin: P0_15

  • Baud rate: 115200 bps

  • 8 bits data transmission LSB first

  • 1 start bit

  • 1 stop bit

  • No parity

../_images/DA1459x_BootROM_flowchart.jpg

Figure 2 BootROM flowchart DA1459x