diff --git a/ports/nrf/boards/feather52840/README.md b/ports/nrf/boards/feather52840/README.md
index 2bfea9320c..4dab9b75b0 100644
--- a/ports/nrf/boards/feather52840/README.md
+++ b/ports/nrf/boards/feather52840/README.md
@@ -21,7 +21,7 @@ $ cd ports/nrf
 $ ./drivers/bluetooth/download_ble_stack.sh
 ```
 
-## Serial Bootloader
+## Installing the Serial Bootloader
 
 The Adafruit nRF52840 Feather uses a serial bootloader that allows you to
 update the core CircuitPython firmware and internal file system contents
@@ -31,14 +31,70 @@ On empty devices, the serial bootloader will need to be flashed once using a
 HW debugger such as a Segger J-Link before the serial updater (`nrfutil`) can
 be used.
 
-### Install the Bootloader with `nrfjprog`
+### Install `nrfjprog`
+
+Before you can install the bootloader, you will first need to install the
+`nrfjprog` tool from Nordic Semiconductors for your operating system. The
+binary files can be downloaded via the following links:
+
+- [nRF5x toolset tar for Linux 32-bit v9.7.2](http://www.nordicsemi.com/eng/nordic/Products/nRF52832/nRF5x-Command-Line-Tools-Linux32/52619)
+- [nRF5x toolset tar for Linux 64-bit v9.7.2](http://www.nordicsemi.com/eng/nordic/Products/nRF52832/nRF5x-Command-Line-Tools-Linux64/51388)
+- [nRF5x toolset tar for OSX v9.7.2](http://www.nordicsemi.com/eng/nordic/Products/nRF52832/nRF5x-Command-Line-Tools-OSX/53406)
+- [nRF5x toolset installer for Windows v9.7.2](http://www.nordicsemi.com/eng/nordic/Products/nRF52832/nRF5x-Command-Line-Tools-Win32/48768)
+
+You will then need to add the `nrfjprog` folder to your system `PATH` variable
+so that it is available from the command line. The exact process for this is
+OS specific, but on a POSIX type system like OS X or Linux, you can
+temporarily add the location to your `PATH` environment variables as follows:
+
+```
+$ export PATH=$PATH:YOURPATHHERE/nRF5x-Command-Line-Tools_9_7_2_OSX/nrfjprog/
+```
+
+You can test this by running the following command:
+
+```
+$ nrfjprog --version
+nrfjprog version: 9.7.2
+JLinkARM.dll version: 6.20f
+```
+
+### Flash the Bootloader with `nrfjprog`
+
+> This operation only needs to be done once, and only on boards that don't
+  already have the serial bootloader installed.
+
+Once `nrfjprog` is installed and available in `PATH` you can flash your
+board with the serial bootloader via the following command:
 
 ```
 make SD=s140 BOARD=feather52840 boot-flash
 ```
 
+This should give you the following (or very similar) output, and you will see
+a DFU blinky pattern on one of the board LEDs:
+
+```
+$ make SD=s140 BOARD=feather52840 boot-flash
+Use make V=1, make V=2 or set BUILD_VERBOSE similarly in your environment to increase build verbosity.
+nrfjprog --program boards/feather52840/bootloader/feather52840_bootloader_6.0.0_s140_single.hex -f nrf52 --chiperase --reset
+Parsing hex file.
+Erasing user available code and UICR flash areas.
+Applying system reset.
+Checking that the area to write is not protected.
+Programing device.
+Applying system reset.
+Run.
+```
+
+From this point onward, you can now use a simple serial port for firmware
+updates.
+
 ## Building and Flashing CircuitPython
 
+With the serial bootloader present on your board, you can build and flash
+a CircuitPython binary via the following command:
+
 ```
 make SD=s140 SERIAL=/dev/ttyACM0 BOARD=feather52840 dfu-gen dfu-flash
 ```