W6100 datasheet(68/149 Pages) WIZNET

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W6100 – Hardwired Dual TCP/IP Stack Controller

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* CAUTION

In case of DHAM = ‘1’, Even if ARP/ND-process performs, the

destination hardware address is set as Sn_DHAR.

4.2.20 Sn_RTR (SOCKET n Retransmission Time Register)

[R=W] [0x0180-0x0181] [0x0000]

Sn_RTR sets SOCKET n retransmission time and the unit is 100us. If Sn_RTR is ‘0’, it is

initialized by Sn_CR[OPEN] = ‘1’ with the value of RTR.

Refer to 6.7 Retransmission.

Ex) S0_RTR = 5000 (0x1388),

5000 * 100us = 0.5s

S0_RTR0(x0180)

S0_RTR1(0x0181)

0x013

0x88

4.2.21 Sn_RCR (SOCKET n Retransmission Count Register)

[R=W] [0x0184] [0x00]

Sn_RCR sets SOCKET n retransmission counter. If Sn_RCR is ‘0’, it is initialized by Sn_CR[OPEN]

= ‘1’ with the value of RCR.

Refer to 6.7 Retransmission.

4.2.22 Sn_KPALVTR (SOCKET n Keep Alive Time Register)

[R=W] [0x0188] [0x00]

Sn_KPALVTR sets SOCKET n TCP Keep Alive (KA) time and the unit is 5 sec. When Sn_SR is

SOCK_ESTABLISHED and SOCKET n sent over 1 Byte DATA, SOCKET n is valid to send KA packet.

If Sn_KPALVRT is ‘0’, SOCKET n only sends KA packet by Sn_CR[SENDKEEP].

Ex) S0_KPALVTR = 10 (0x0A),

10 * 5s = 50s

S0_KPALVTR(0x0188)

0x0A

4.2.23 Sn_TX_BSR (SOCKET n TX Buffer Size Register)

[R=W] [0x0200] [0x02]

Sn_TX_BSR sets SOCKET n TX Buffer size to 0, 1, 2, 4, 8 or 16KB.

If it sets to the other value or the total size of Sn_TX_BSR exceeds 16KB, it causes a malfunction

in buffer read/write access process.

W6100 Datasheet(PDF) 68 Page - WIZnet Co., Ltd