W5100 datasheet(21/72 Pages) WIZNET

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4. Register Descriptions

4.1 Common Registers

MR (Mode Register) [R/W] [0x0000] [0x00]

This register is used for S/W reset, ping block mode, PPPoE mode and Indirect bus I/F.

RST

PPPoE

IND

Bit

Symbol

Description

RST

S/W Reset

If this bit is ‘1’, internal register will be initialized. It will be automatically

cleared after reset.

Reserved

Ping Block Mode

0 : Disable Ping block

1 : Enable Ping block

If the bit is set as ‘1’, there is no response to the ping request.

PPPoE

PPPoE Mode

0 : Disable PPPoE mode

1 : Enable PPPoE mode

If you use ADSL without router or etc, you should set the bit as ‘1’ to

connect to ADSL Server. For more detail, refer to the application note,

“How to connect ADSL”.

Not Used

Address Auto-Increment in Indirect Bus I/F

0 : Disable auto-increment

1 : Enable auto-increment

At the Indirect Bus I/F mode, if this bit is set as ‘1’, the address will be

automatically increased by 1 whenever read and write are performed. For

more detail, refer to “6.2 Indirect Bus IF Mode”.

IND

Indirect Bus I/F mode

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