NXP Semiconductors
AN12306
A71CL Quick start guide for A71CLARD-BAI and Kinetis
515910
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2018. All rights reserved.
Application note
COMPANY PUBLIC
Rev. 1.0 — 14 December 2018
515910
19 of 32
To write the downloaded firmware into the Kinetis FRDM board, the bootloader mode
should be enabled. For this, press ‘
Reset’
button and, while holding down the button,
connect a USB cable to the debugger port of the Kinetis board (e.g., FRDM K64,
Fig 24
).
Fig 24. Enabling bootloader mode
After connecting the USB cable to the Kinetis board, the green led located inside the
yellow square will start blinking and the development PC will show a new drive called
‘
BOOTLOADER’
. The drive may disappear again after ~30 seconds in case there is no
interaction, in this case disconnect and connect again with pressing the ‘
Reset’
button.
Drag the downloaded firmware directly into the drive (
Fig 25
). Once the file is copied
inside the ‘
BOOTLOADER’
drive the LED will soon start blink fast, then unplug the
Kinetis board and plug it again. The green led stays on, thus indicating that the
OpenSDA bootloader firmware has been configured correctly.
Fig 25. Copying the firmware into the Kinetis board in ‘BOOTLOADER’ mode