W3100A Datasheet, PDF (20/63 Pages) List of Unclassifed Manufacturers – i2Chip W3100A

TA_PR (Tx Ack Pointer Register) [R/W, C0 : 0x18 – 0x1B, C1 : 0x24 – 0x27, C2 : 0x30 – 0x33,
C3 : 0x3C – 0x3F]
Included in each channel, this register displays the start pointer of the data to be transmitted when
transmitting data.
Driver uses this register and Tx Write Pointer to calculate free size of Tx Buffer.
In other words, the difference in value of Tx Write Pointer and Tx Ack Pointer is the buffer size being used.
4. Channel Registers
SSR (Socket State Register) [R, C0 : 0xA0, C1 : 0x B8, C2 : 0x D0, C3 : 0x E8]
Displays the socket state of the corresponding channel.
Value
State
0x00 SOCK_CLOSED
0x01 SOCK_ARP
0x02 SOCK_LISTEN
0x03 SOCK_SYNSENT
0x04 SOCK_SYNSENT_ACK
0x05 SOCK_SYNRECV
0x06 SOCK_ESTABLISHED
0x07
0X08
0X09
0X0A
0X0B
0X0C
0X0D
SOCK_CLOSE_WAIT
SOCK_LAST_ACK
SOCK_FIN_WAIT1
SOCK_ FIN_WAIT2
SOCK_CLOSING
SOCK_TIME_WAIT
SOCK_RESET
0X0E
0X0F
0X10
SOCK_INIT
SOCK_UDP
SOCK_RAW
0X11 SOCK_UDP_ARP
0X12 SOCK_UDP_DATA
0X13 SOCK_RAW_INIT
Meaning
Socket is closed
Standing by for reply after transmitting ARP
Request
Standing by for connection set-up to the client
when acting in passive mode
Standing by for SYN,ACK after transmitting
SYN for connection set-up when acting in
active mode
Connection set-up is complete after
SYN,ACK is received and ACK is transmitted
in active mode
SYN,ACK is being transmitted after receiving
SYN from the client in listen state, passive
mode
Connection set-up is complete in active,
passive mode
Connection being terminated
Connection being terminated
Connection being terminated
Connection being terminated
Connection being terminated
Connection being terminated
Connection is being terminated after receiving
reset packet from the peer
Socket initializing
Applicable channel is initialized in UDP mode
Applicable channel is initialized in IP layer
RAW mode
Standing by for reply after transmitting ARP
request packet to the destination for UDP
transmission
Data transmission in progress in UDP or
RAW mode
W3100A initialized in MAC layer RAW mode
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