Datasheet

Product data sheet Rev. 1.0 — 26 February 2019 107 of 123

NXP Semiconductors

LPC55S6x

32-bit ARM Cortex-M33 microcontroller

13. Application information

13.1 Standard I/O pin configuration

Figure 31 shows the possible pin modes for standard I/O pins:

• Digital output driver: enabled/disabled.

• Digital input: Pull-up enabled/disabled.

• Digital input: Pull-down enabled/disabled.

• Digital input: Repeater mode enabled/disabled.

• Z mode; High impedance (no cross-bar currents for floating inputs).

The default configuration for standard I/O pins is Z mode. The weak MOS devices provide

a drive capability equivalent to pull-up and pull-down resistors.

13.2 Connecting power, clocks, and debug functions

<tbd>

13.3 I/O power consumption

I/O pins are contributing to the overall dynamic and static power consumption of the part.

If pins are configured as digital inputs, a static current can flow depending on the voltage

level at the pin and the setting of the internal pull-up and pull-down resistors. This current

can be calculated using the parameters R

and R

given in Table 21 for a given input

voltage V

. For pins set to output, the current drive strength is given by parameters I

and

in Table 21, but for calculating the total static current, you also need to consider any

The glitch filter rejects pulses of typical 12 ns width.

Fig 31. Standard I/O and RESET pin configuration <tbd>