RIGADO R41Z-EVAL, Руководство пользователя

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R41Z-EVAL User Guide Rev 2.0
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6.3.2 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 23 – Schematic: IR LED
6.3.3 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 24 – Schematic: User LEDs