W5100S datasheet(52/110 Pages) WIZNET

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W5100S Datasheet Version1.2.5

UNIB

Unicast Blocking on UDP Multicast Mode

On UDP Multicast Mode, this Bit is set to ‘1’ to block UDP Unicast

Packet.

0 : Disable Unicast Blocking

1 : Enable Unicast Blocking

3.2.24 Sn_KPALVTR (SOCKET n Keep Alive Timer Register)

[RO] [0x0030+0x0100*(n+4)] [0x00]

Sn_KPALVTR sets ‘Keep Alive (KA)’ Packet transmission time. The unit is 5 sec. TCP Mode

SOCKET transmits KA Packet every Sn_KPALVTR. Before transmitting KA Packet, SOCKET must

transmit Data (over 1 Byte) Packet at least once. By Sn_CR [SENDKEEP], KA Packet is

transmitted without Sn_KPALVTR setting.

Ex) S0_KPALVTR = 10 (0x0A),

10 * 5s = 50s

S0_KPALVRT(0x0430)

0x0A

3.2.25 Sn_RTR (SOCKET n Retransmission Time Register)

[R=W] [0x0032+0x0100*(n+4), 0x0033+0x0100*(n+4)] [0x0000]

Sn_RTR sets SOCKET n Retransmission Time. If Sn_RTR is zero, SOCKET n Retransmission Time

is set by RTR. (Ref 4.8 Retransmission)

Ex) S0_RTR = 5000 (0x1388),

5000 * 100us = 0.5s

S0_RTR0(x0432)

S0_RTR1(0x0433)

0x013

0x88

3.2.26 Sn_RCR (SOCKET n Retransmission Count Register)

[R=W] [0x0034+0x0100*(n+4)] [0x00]

Sn_RCR sets SOCKET n Retransmission Counter. If Sn_RCR is zero, SOCKET n Retransmission

Counter is set by RCR. (Ref 4.8 Retransmission)

W5100S Datasheet(PDF) 52 Page - WIZnet Co., Ltd