S7600A datasheet(40/60 Pages) SII

40 / 60 page

TCP/IP Network Stack LSI

S-7600A

Hardware Specification Revision 1.3

7-13

Seiko Instruments Inc.

7.3.15. Socket Status Mid Register (0x23)

(Read-Only, Default 0x00)

This read-only register reports other socket status conditions.

Table 7-25

Socket Status Mid Register Bit Definitions

Bit

Def.

URG

RST

Term

ConU

TCP State

Default

0x0

Table 7-26

Socket Status Mid Register Description

Bit

Bit Name

Access

Description

URG

This bit indicates the arrival of urgent data. Writing a “1” to the

URG bit in the Socket Interrupt register (bit 7) clears this bit.

0 = No urgent data present

1 = Urgent data present

RST

This bit indicates when the socket receives the RST signal from

the TCP peer.

0 = No RST received

1 = RST received

Term

This bit indicates when the socket terminates from the source

and triggers an interrupt if the Term_En bit is set in the Socket

Interrupt Mask High register (0x2B). The interrupt mask setting

does not effect the reporting of this status bit.

0 = Normal Operating Condition

1 = Socket terminated from source

This bit becomes “1” when the S-7600A receives a TCP

segment with the FIN flag on. This means that the remote peer

has requested to close the TCP connection.

ConU

This bit indicates when the socket establishes a connection to a

host machine. The bit clears when the connection terminates (by

either end).

0 = No Connection Established

1 = Connection Established

3:0

TCP State

These bits indicate the current TCP state.

0 = CLOSED

1 = SYN_SENT

2 = ESTABLISHED

3 = CLOSE_WAIT

4 = LAST_ACK

5 = FIN_WAIT1

6 = FIN_WAIT2

7 = CLOSING

8 = TIME_WAIT

9 = LISTEN

a = SYN_RECVD

S7600A Datasheet(PDF) 40 Page - Seiko Instruments Inc

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