W5500 Datasheet, PDF (35/65 Pages) List of Unclassifed Manufacturers – Supports 8 independent sockets simultaneously

IR (Interrupt Register) [R/W] [0x0015] [0x00]
IR indicates the interrupt status. Each bit of IR will be still „1‟ until the bit will be
written to „1‟ by the host. If IR is not equal to „0x00‟, INTn PIN is asserted low until it
is „0x00‟.
7
6
CONFLICT UNREACH
5
PPPoE
4
3
2
1
0
MP
Reserved Reserved Reserved Reserved
Bit
Symbol
Description
IP Conflict
7 CONFLICT Bit is set as „1‟ when own source IP address is same with the sender
IP address in the received ARP request.
Destination unreachable
When receiving the ICMP (Destination port unreachable) packet, this
bit is set as „1‟.
6
UNREACH
When this bit is „1‟, Destination Information such as IP address and
Port number may be checked with the corresponding UIPR &
UPORTR.
PPPoE Connection Close
5
PPPoE
When PPPoE is disconnected during PPPoE mode, this bit is set.
Magic Packet
4
MP
When WOL mode is enabled and receives the magic packet over UDP,
this bit is set.
3~0 Reserved Reserved
W5500 Datasheet Version1.0 (August 2013)
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