User's Manual

LZT 123 1834 66
5.14 LED
Pin Name Direction Function
33 LED Output LED control signal
The LED interface is intended to operate a status LED, which can be programmed on
and off, or for a particular blink sequence. The LED signal is derived from a standard
GPIO and does not have sufficient drive capability to operate an LED directly, so it
requires the user to implement some form of transistor circuit. A recommended
implementation is shown below.
Figure 5.14-1 Recommended circuit for an LED