Data Sheet

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6.3 General Purpose I/O Specification
GPIO Specification Min. Typ. Max. Units
Input high voltage, VIH
0.7xVdd
Vdd V
Input low voltage, VIL GND 0.3xVdd V
Output high voltage, VOH
Vdd-0.4
Vdd V
Output low voltage, VOL GND GND+0.4 V
Current at VSS+0.4 V, output set low, standard drive 1 2 4 mA
Current at VSS+0.4 V, output set low, high drive,
VDD ≥ 2.7 V
6 10 15 mA
Current at VDD-0.4 V, output set high, standard drive 1 2 4 mA
Current at VDD-0.4 V, output set high, high drive 6 9 14 mA
Pull-up resistance, RPU 11 13 16 kΩ
Pull-down resistance, RPD 11 13 16 kΩ
*VDD ≥ 2.7V. For details, see nRF52840 datasheet "GPIO Electrical Specification".
6.4 Communication interface characteristics, bit rates
Bit Rates Min. Typ. Max. Units
Bit rate for SPI, fSPI 0.125 8 Mbps
Bit rates for TWI, f2W 100 400 kbps
Baud rate for UART, fUART 1000 kbps