EVK-R41Z - User guide
UBX-19033357 - R03
Hardware description
Page 12 of 23
2.4.1
Expansion headers
Figure 9: Expansion header pinout
2.4.2
IR LED Provision
An unpopulated position for an IR LED and driver transistor are provided on the evaluation
board. If IR is part the application under development, these parts can be populated by the end
user. The IR LED footprint is intended for a right angle, SMT 3317 package. The drive
transistor footprint is intended for an SOT-23 NPN BJT. Resistor R45 is not provided on the
board to avoid pulling down PTB1.
Figure 10: Schematic: IR LED
