W5300 datasheet(73/128 Pages) WIZNET

73 / 128 page

The basic operation is same as SEND.

SEND transmits data after acquiring destination hardware address

through ARP-process, but SEND_MAC transmits data by regarding

Sn_DHAR as destination hardware address. SEND_MAC can reduce

network traffic by removing ARP-process when sending UDP or IP raw

data to the destination.

0x22

SEND_KEEP

Valid only in TCP mode.

In order to check TCP connection status with the peer, KEEP

ALIVE(KA) packet can be transmitted.

SEND_KEEP is available only in case of 'Sn_KPALVTR=0', but ignored

in case of 'Sn_KPALVTR>0'. In case of 'Sn_KPALVTR > 0', KA packet

is automatically transmitted if there is no data communication during

the time of Sn_KPALVTR.

If KA packet is successfully transmitted (when KA/ACK packet is

received from the peer), Sn_SSR maintains SOCK_ESTABLISHED

status. If it is failed to transmit the KA packet (when the peer already

closed the connection, or KA/ACK is not transmitted), TCPTO will occurs

(Sn_IR(3)='1' ) and Sn_SSR is changed to SOCK_CLOSED.

cf>

KA packet

can

transmitted

after

one

data

communication is processed.

0x40

RECV

It notifies that the host received the data packet of SOCKETn

cf> Before RECV command, the host should copy receiving data

packet from internal RX memory into the host memory through

Sn_RX_FIFOR.

Below commands are valid at the SOCKET0 and S0_MR(P3:P0)=S0_MR_PPPoE.

For more detail, refer to

“How to use PPPoE in W5300”.

0x23

PCON

PPPoE connection begins by transmitting PPPoE discovery packet.

0x24

PDISCON

Closes PPPoE connection.

0x25

PCR

In each phase, it transmits REQ message.

0x26

PCN

In each phase, it transmits NAK message.

0x27

PCJ

In each phase, it transmits REJECT message.

W5300 Datasheet(PDF) 73 Page - WIZnet Co., Ltd

W5300 Datasheet(HTML) 73 Page - WIZnet Co., Ltd

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL