W5100 datasheet(26/72 Pages) WIZNET

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PATR (Authentication Type in PPPoE mode) [R] [0x001C-0x001D] [0x0000]

This register notifies authentication method that has been agreed at the connection with

PPPoE Server. W5100 supports two types of Authentication method - PAP and CHAP.

Value

Authentication Type

0xC023

PAP

0xC223

CHAP

PTIMER (PPP Link Control Protocol Request Timer Register) [R/W] [0x0028] [0x28]

This register indicates the duration for sending LCP Echo Request. Value 1 is about 25ms.

Ex) in case that PTIMER is 200,

200 * 25(ms) = 5000(ms) = 5 seconds

PMAGIC (PPP Link Control Protocol Magic number Register) [R/W] [0x0029] [0x00]

This register is used in Magic number option during LCP negotiation. Refer to the application

note, “How to connect ADSL”.

UIPR (Unreachable IP Address Register) [R] [0x002A – 0x002D] [0x00]

In case of data transmission using UDP (refer to “5.2.2. UDP”), if transmitting to non-existing

IP address, ICMP (Destination Unreachable) packet will be received. In this case, that IP

address and port number will be saved in the Unreachable IP Address Register(UIPR) and

Unreachable Port Register(UPORT) respectively.

Ex) in case of “192.168.0.11”,

0x002A

0x002B

0x002C

0x002D

192 (0xC0)

168 (0xA8)

0 (0x00)

11 (0x0B)

UPORT (Unreachable Port Register) [R] [0x002E – 0x002F] [0x0000]

Refer to Unreachable IP Address Register (UIPR)

Ex) In case of 5000(0x1388),

0x002E

0x002F

0x13

0x88

W5100 Datasheet(PDF) 26 Page - WIZnet Co., Ltd