User's Guide

Please note VDDH voltage changes depending on whether Glove80 is currently battery

powered or usb powered. It can be anywhere from 3V to 5V. It is recommended you use a

voltage regulator to power your circuit.

VEXT is the voltage that nRF52840 is internally operating in. It is also the voltage of the GPIO

signals. VEXT is set by the bootloader, and is typically 2.4V.

Your circuit should be powered either by VDDH or VEXT. Please ensure that you are not

exceeding the current limit. Generally speaking you should not draw more than 3mA from VEXT,

and no more than 80mA from VDDH. However these current limits are not guaranteed, and are

provided purely as a guideline. The amount of current used will depend on many factors,

including the firmware version and what other peripherals (such as RGB LEDs) are powered on.

Your circuit must ensure that GPIO input signal voltage is no higher than VEXT. Otherwise

permanent damage can occur. Please note that when the Glove80 is powered off, VEXT will be

0V but VDDH may not be 0V, for example if the Glove80 is charging. As such, care must be

taken to ensure not to drive the GPIO when VEXT is 0V.

The pin mapping on nRF52840 are as follows:

Left hand nRF52840 pin

Right hand nRF52840 pin

EXT1

P0.22

P0.21

EXT2

P0.21

P0.24

EXT3

P0.24

P0.20

EXT4

P0.20

P0.25

EXT5

P0.25

P0.22

SWO_EXT6

P1.00

Pae 33 Glove80 User Guide