Datasheet

Serial Ethernet
MikroElektronika
The Serial Ethernet board features three LEDs:
POWER: indicates that the additional board is turned on;
LED A: indicates that the Ethernet cable is connected; and
LED B: indicates Ethernet network activity. It will be illuminated on every data package receive/transmite.
The ENC28J60 requires the 3.3V power supply voltage, but it is designed to be easily used with 5V devices. Its input pins CS, SCK,
SI and RESET are 5V tolerant, which means that it will be able to receive data from the microcontroller. However, if the microcontroller
operates at 5V, it likely will not be able to receive data correctly from the Ethernet controller with 3.3.V outputs. For this reason, voltage
level translators, such as 74LVCC3245 and 74LVC1T45, that are used to adjust voltage levels are provided on the board.
The position of jumper J1 depends on the power supply voltage of the microcontroller connected to the Serial Ethernet additional
board:
- If the power supply voltage is 5V, jumper J1 should be placed in the 5V position.
- If the power supply voltage is 3.3V, jumper J1 should be placed in the 3.3V position.
Figure 4: Block diagram of the 74LV1T45 circuit
Figure 5: Block diagram of the 74LVCC3245 circuit