82596CA Datasheet, PDF (41/76 Pages) Intel Corporation – HIGH-PERFORMANCE 32-BIT LOCAL AREA NETWORK COPROCESSOR

82596CA
Transmit
This command is used to transmit a frame of user data onto the serial link The format of a Transmit command
is as follows
31
ODD WORD
16 15
EVEN WORD
EL S I X X X X X X X X X X 1 0 0 C B
STATUS BITS
A15
TBD OFFSET
A0 A15
LINK OFFSET
4th byte
DESTINATION ADDRESS
LENGTH FIELD
6th byte
Figure 28 TRANSMIT 82586 Mode
0
MAXCOLL
0
A0 4
1st byte 8
12
31
ODD WORD
16 15
EVEN WORD
0
EL S I 0 0 0 0 0 0 0 0 NC SF 1 0 0 C B
STATUS BITS
MAXCOLL
0
A15
TBD OFFSET
A0 A15
LINK OFFSET
A0 4
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 EOF 0
TCB COUNT
8
4th byte
DESTINATION ADDRESS
1st byte 12
LENGTH FIELD
6th byte
16
OPTIONAL DATA
Figure 29 TRANSMIT 32-Bit Segmented Mode
31
ODD WORD
16 15
EVEN WORD
0
EL S I 0 0 0 0 0 0 0 0 NC SF 1 0 0 C B
STATUS BITS
MAXCOLL
0
A31
LINK ADDRESS
A0 4
A31
TRANSMIT BUFFER DESCRIPTOR ADDRESS
A0 8
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 EOF 0
TCB COUNT
12
4th byte
DESTINATION ADDRESS
1st byte 16
LENGTH FIELD
6th byte
20
OPTIONAL DATA
Figure 30 TRANSMIT Linear Mode
31
COMMAND WORD
16
EL S I 0 0 0 0 0 0 0 0 NC SF 1 0 0 2
uu
0 No CRC Insertion disable when the 0 Simplified Mode all the Tx data is in
configure command is configured to the Transmit Command Block The
not insert the CRC during
Transmit Buffer Descriptor Address
transmission the NC bit has no
field is all 1s
effect
1 Flexible Mode Data is in the TCB and
1 No CRC Insertion enable when the in a linked list of TBDs
configure command is configured to
insert the CRC during transmission
the CRC will not be inserted when
NC e 1
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