Data Sheet

iEthernet

W5200

SUBR (Subnet Mask Register) [R/W] [0x0005 – 0x0008] [0x00]

This register sets up the subnet mask address.

Ex) In case of “255.255.255.0”

0x0005 0x0006 0x0007 0x0008

255 (0xFF) 255 (0xFF) 255 (0xFF) 0 (0x00)

SHAR (Source Hardware Address Register) [R/W] [0x0009 – 0x000E] [0x00]

This register sets up the Source Hardware address.

Ex) In case of “00.08.DC.01.02.03”

0x0009 0x000A 0x000B 0x000C 0x000D 0x000E

0x00 0x08 0xDC 0x01 0x02 0x03

SIPR (Source IP Address Register) [R/W] [0x000F – 0x0012] [0x00]

This register sets up the Source IP address.

Ex) In case of “192.168.0.2”

0x000F 0x0010 0x0011 0x0012

192 (0xC0) 168 (0xA8) 0 (0x00) 2 (0x02)

IR (Interrupt Register) [R] [0x0015] [0x00]

This register is accessed by the host processor to know the cause of interrupt. Any

interruption can be masked in the Interrupt Mask Register (IMR2). The INTn signal retain low

as long as any masked signal is set, and will not go high until all masked bits in this Register

have been cleared.

7 6 5 4 3 2 1 0

CONFLICT

Reserved

PPPoE Reserved

Reserved

Bit Symbol Description

7 CONFLICT

IP Conflict

It is set as ‘1’ when there is ARP request with same IP address

as Source IP address. This bit is cleared to ‘0’ by writing ‘1’ to

this bit.

6 Reserved Reserved

5 PPPoE

PPPoE Connection Close

In the Point-to-Point Protocol over Ethernet (PPPoE) Mode, if

the PPPoE connection is closed, ‘1’ is set. This bit will be

cleared to ‘0’ by writing ‘1’ to this bit.

4 Reserved Reserved

3 Reserved Reserved

2 Reserved Reserved

1 Reserved Reserved

0 Reserved Reserved