W5100S datasheet(36/110 Pages) WIZNET

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W5100S Datasheet Version1.2.5

Bit

Symbol

Description

[7:2]

Reserved

ARP

ARP Request Transmission Command

1 :Transmit ARP packet

0 : Ready

PING

PING Request Transmission Command

1: Transmit PING Request

0 : Ready

3.1.33 SLRTR (SOCKET-less Retransmission Time Register)

[R=W] [0x004D-0x004E] [0x07D0]

SLRTR sets SLCR Retransmission Time. The unit is 100us. If there is no Response for ARP or PING

Request Packet transmitted by SLCR, W5100S automatically retransmits Request Packet every

SLRTR. (Ref 4.8 Retransmission)

Ex) SLRTR = 5000 (0x1388),

5000 * 100us = 0.5s

SLRTR0(0x004D)

SLRTR1(0x004E)

0x013

0x88

3.1.34 SLRCR (SOCKET-less Retransmission Count Register)

[R=W] [0x004F] [0x00]

SLRCR sets SLCR Retransmission Number. If the number of Retransmission exceeds SLRCR,

SOCKET-less Timeout (SLIR [TIMEOUT] = ‘1’) occurs. (Ref 4.8 Retransmission)

3.1.35 SLPIPR (SOCKET-less Peer IP Address Register)

[R=W] [0x0050-0x0053] [0x00000000]

SLPIPR configures Peer IP Address for ARP or Ping Request Packet transmitted by SLCR.

Ex) SLPIPR = “192.169.0.21”

SLPIPR0(0x0050)

SLPIPR1(0x0051)

SLPIPR2(0x0052)

SLPIPR3(0x0053)

192(0xC0)

168(0xA8)

0(0x00)

21(0x15)

3.1.36 SLPHAR (SOCKET-less Peer Hardware Address Register)

[RO] [0x0054-0x0059] [0x000000000000]

If W5100S received ARP Reply against SLCR [ARP] and SLIPR [ARP] is set to ‘1’, Peer Hardware

Address from ARP Reply is written on SLPHAR.

Ex) SLPHAR = “11:22:33:AA:BB:CC”

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