Pin No. | Pin Type | Pin Name | Description
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J1 | 1 | P | GND | Ground
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| 2 | P | GND | Ground
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| 3 | I | MOSI | SPI Master Out Slave In This pin is used for SPI MOSI signal pin
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| 4 | I | SCLK | SPI Clock This pin is used for SPI Clock Signal pin
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| 5 | I | SCNn | SPI Slave Select
This pin is used for SPI Slave Select Signal Pin when using SPI interface
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| 6 | I | INTn | W5500 Interrupt : Low activity
This pin is used for indicating event like socket TCP connection, disconnection, data receiving timeout, WOL(Wake on Lan) and so on occurred in W5500 inside WIZ550io.
The interrupt is cleared by writing IR register or Sn_IR. All interrupts are maskable.
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