13. Set-up and operation
LUCIA Operation Manual rev 1.2.0
13
13.3. GPIO Configuration: Mono high-impedance models
The Default functionality is as described below for General Purpose Inputs and Output (GPIO).
Remote volume control
– Connect a remote volume control potentiometer to Ground, GPI1 and Vcc as shown
in the diagram following. Volume control is after input mixing. (The Vcc voltage output is 3.3 V).
Amplifier wake-up
– Connect an external contact closure to Ground and GPI2 as shown in the diagram follow-
ing. Wake-up happens within 0.5 s after contact closure.
Amplifier status
– Pins 5 and 6 connect to an internal relay to provide amplifier fault indication. The relay is closed
when the amplifier is on and operating normally. The relay opens if a fault in either channel or in the power supply
interrupts normal operation of one or both channels.
Optional GPIO modes
– The LUCIA models allow other GPIO functions to be enabled by applying changes to
the amplifier firmware. See “Control block” in Section 14.5.2.4.