Product Info

HADRON R4320C- Hadron Technical Information Manual 13
Power supply connection
In the following schematic suggested R4320C power supply connection is shown.
The use of a resettable fuse (F1) is recommended since R4320C does not provide internal current limitation protection.
Diode D1 avoid damage to the reader in case of reverse polarity connection.
Fig. 2.2: Hadron R4320C Power Supply Connection
General purpose I/O connections
The GPIO0-GPIO3 pins are 4 general-purpose bidirectional pins. Their default direction after a power on reset or a
general reset is set to input.
GPIO, when configured as Outputs, can be used to drive indicators as LEDs or buzzers or to send trigger signal to others
equipment.
GPIO, when configured as Inputs, can accept control signals from other equipment or trigger signals from sensors (i.e.
photocells).
In the following schematic an example of application of GPIO is shown.
Fig. 2.3: Hadron R4320C GPIO Connection Example