Work
Projects- 3D Printing Projects
- Amateur Radio
- Automotive Projects
- Electronics Projects
- Gaming Projects
- Homelab Projects
- Horticulture Projects
- Other Projects
- Project Projects
- Software Projects
- Tumblr (photography)
-
Sidebar
projects:electronics:nrf52:nrf52840_notes
This is an old revision of the document!
Table of Contents
nRF52840 Notes
High Voltage Mode
Motivation
- Simplify BoM and layout by using the nrf52840 VDDH → VDD LDO
Limitations
- <25 mA output from VDDH to VDD (REG0)
- 2.5 V < VDDH < 5.5 V
Requirements
- VDD must not be connected to VDDH or any power supply at reset
- Adafruit nRF52 Bootloader → board.h →
#define UICR_REGOUT0_VALUE UICR_REGOUT0_VOUT_3V3(Adafruit nRF52 Bootloader GitHub search)
Notes
nice_nanoseems like a good bootloader variant to use if you need High Voltage mode
Further Reading
NFC Pins as GPIO
Motivation
- Have more usable GPIO pins
Requirements
- Adafruit nRF52 Bootloader → board.mk →
USE_NFCTmust not be= yes(Adafruit nRF52 Bootloader GitHub search)
Flash Bootloader with ST-Link
openocd -f interface/stlink.cfg -f target/nrf52.cfg -c "program nice_nano_bootloader-0.9.2_s140_6.1.1.hex verify reset exit"
projects/electronics/nrf52/nrf52840_notes.1756522985.txt.gz · Last modified: by Andrew Yong
Except where otherwise noted, content on this wiki is licensed under the following license: GNU Free Documentation License 1.3
