W5300 datasheet(90/128 Pages) WIZNET

90 / 128 page

Fig 7. Access to Internal RX Memory

5. Functional Description

W5300 can provide Internet connectivity simply by setting some register. In this chapter, we can

learn how to initialize W5300 and communicate according to the protocol types (TCP, UDP,

IPRAW and MACRAW) by reviewing the pseudo code.

5.1 Initialization

The initialization of W5300 is processed through 3 steps: Host interface setting, network

information setting, and internal TX/RX memory allocation.



STEP 1 : Setting host interface

Setting data bus width, host interface mode & timing (Refer to MR)

Setting host interrupt (Refer to IMR)



STEP 2 : Setting network information

Setting the basic network information for data communication (Refer to SHAR, GAR,

SUBR and SIPR)

Setting the retransmission time-period and retry-count to be used in case of failure of

packet retransmission. (Refer to RTR, RCR)

The source hardware address to be set by SHAR, is the unique hardware address of

Ethernet device (Ethernet MAC address) used in Ethernet MAC layer.

The MAC address allotment is managed by IEEE. The manufacturers should assign MAC

addresses acquired from IEEE to their network devices.

Refer to http://www.ieee.org/, http://standards.ieee.org/regauth/oui/index.shtml



STEP 3 : Allocation internal TX/RX memory for SOCKETn

W5300 Datasheet(PDF) 90 Page - WIZnet Co., Ltd