Data Sheet

NINA-B40 series - Data sheet
UBX-19049405 - R04 Electrical specifications Page 26 of 40
C1 - Public
Pin name Parameter Min Typ Max Unit Remarks
Rise/Fall time 9 – 25 ns
Standard drive strength, depending on
load capacitance
4 – 8 ns
High drive strength, depending on load
capacitance
Input pull-up resistance 11 13 16 kΩ
Can be added to any GPIO pin
configured as input
Input pull-down resistance 11 13 16 kΩ
Can be added to any GPIO pin
configured as input
GPIO_28,
GPIO_29
Leakage current 1 10 µA
When not configured for NFC and driven
to different logic levels
Table 16: Digital pin characteristics
4.2.9 I2C pull-up resistor values
Symbol
Parameter
Bus capacitance Min Typ Max Unit
R_PUstandard External pull-up resistance required on
I2C interface in standard mode
(100 kbps)
10 pF 1 - 115 kΩ
50 pF 1 - 23 kΩ
200 pF 1 - 6 kΩ
400 pF 1 - 3 kΩ
R_PUfast External pull-up resistance required on
I2C interface in fast mode (400 kbps)
10 pF 1 - 35 kΩ
50 pF 1 - 7 kΩ
200 pF 1 - 1.5 kΩ
400 pF 1 - 1 kΩ
Table 17: Suggested pull-up resistor values
4.2.10 Analog comparator
Symbol Parameter Min Typ Max Unit
t_powersave
Time to generate interrupt/event when the comparator is in
power save mode
0.6 µs
t_balanced
Time to generate interrupt/event when the comparator is in
balanced mode
0.2 µs
t_speed
Time to generate interrupt/event when the comparator is in
high speed mode
0.1 µs
Table 18: Electrical specification of the two analog comparators