Caen RFID Hadron R4320C, Technical Information Manual

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HADRON R4320C/R4320CB - Technical Information Manual 12
The GPIO0-GPIO3 pins are 4 general purpose bidirectional pins, their default direction is IN.
The RXD/TXD pins are used to communicate with the R4320C/R4320CB board via UART port; to establish a
link with the device you must configure your COM port as follows
2
:
Baud rate: 115200
Parity: None
Data bits: 8
Stop bits: 1
Flow Control: none
5V USB signal is used to sense the presence of an USB host device connected to the module and not for
supply the device. This pin shall be left unconnected for UART operation.
Powering on the module with ERASE pin tied at high level for more than 220ms enables the internal
microcontroller FW recovery/upgrade procedure.
When SHUTDOWN pin is at high level the internal circuitry of the module is powered off and the current
consumption is reduced to less than 1mA.
Power supply and interface connector electrical characteristics
3
Pin name Pin No. Parameter Min Typ Max Unit
VCC 3,4
Supply DC voltage 3.5 4.25 5.5 V
Supply DC current 0.25 2.4 A
GPIO[0:3] 5, 6, 7, 8
VOL 0 0.4 V
VOH 2.0 3.3 V
Output current 3.0 mA
VIL -0.3 0.8 V
VIH 2.0 5.5 V
Input current 1 μA
RXD 9
VIL -0.3 0.8 V
VIH 2.0 5.5 V
Input current 1 μA
TXD 10
VOL 0 0.4 V
VOH 2.4 3.3 V
Output current 1.5 mA
USB DM 11
VIL 0.8 V
VIH 2 V
VOL 0 0.3 V
VOH 2.8 3.3 V
USB DP 12
VIL 0.8 V
VIH 2 V
VOL 0 0.3 V
VOH 2.8 3.3 V
5V USB 13
VIL -0.3 0.8 V
VIH 2 5.5 V
Input current 1 µA
SHUTDOWN 14
VIL 0 0.8 V
VIH 2 5.5 V
Input current 40 µA
ERASE 15
VIL 0 0.8 V
VIH 2 5.5 V
Input current 6 mA
GND 1,2
Tab. 2.3: Hadron R4320C/R4320CB Supply and Interface Connector Electrical Characteristics
2
Since R4320C RX/TX are TTL level signals, to connect it with a PC, a TTL/RS232 translator shall be used.
3 Exceeding maximum values reported in the table may cause permanent damage to the model.