EVK-R41Z - User guide
UBX-19033357 - R03
Hardware description
Page 13 of 23
2.4.3
User LEDs
The R41Z evaluation board features an RGB LED and a separate blue LED. Since the GPIO used
are shared with the expansion header, solder jumpers are provided to disconnect the LEDs if
required. Since the LEDs are powered from the peripheral power bus VIO, they will be powered
directly by the R41Z module when it is operating in either Buck or Boost DC-DC mode. This
may affect LED visibility at low output voltages.
Figure 11: Schematic: User LEDs
2.4.4
Thermistor
A thermistor circuit is provided to demonstrate the analog capabilities of the R41Z module
and to aid development of applications requiring temperature measurement.
Figure 12: Schematic: Thermistor and ADC mode selection
2.4.5
User buttons
Two mechanical buttons (SW3, SW4) and two capacitive touch buttons (SW2, SW5) are
provided on the evaluation board. The Capacitive touch buttons enable easy development of
applications that make use of the R41Z’s Touch Sense Input (TSI) module.
