MB86967 Datasheet, PDF (50/129 Pages) Fujitsu Component Limited. – LAN Controller with PC Card, ISA Bus, and General-purpose Bus Interfaces

MB86967
(3) BMPR11: 16 Collision Control Register
BMPR11 controls operation of the data link controller after a 16 collisions occur.
Read/Write
Initial Value
Bit 7
0
0
Bit 6
0
0
Bit 5
0
0
Bit 4
0
0
Bit 3
0
0
Bit 2
16COL
CNTL 2
0
Bit 1
16COL
CNTL 1
0
Bit 0
16COL
CNTL 0
0
Bit no. Bit name
7 to 3 Not used
2 to 0 16COL CNTL
2 to 0
Operation
Read
Write
Read/
Write
Value
0
0
—
Function
The read values of these bits is always 0.
Writing 1 is prohibited. Always write 0 at writing.
16COL CNTL
210
Operation after 16COLs Occur
1 1 0 Similar to ordinary collisions, the transmit
packet causing 16COLs is retransmitted
automatically (Auto Mode).
1 1 1 The next packet is transmitted
automatically after skipping the transmit
packet causing the 16COLs (Auto Mode).
0 1 × When 16COLs occur, stop the transmitted
data link controller temporarily. To resume
transmission, write the values listed in the
table below to this register. These values
are valid only when written. Write them to
this register each time transmission stops
after 16COLs occur (Manual Mode).
16COL CNTL
210
Operation when Resuming
Transmission in Manual Mode
0 1 0 Similar to ordinary collisions, the transmit
packet causing 16COLs is retransmitted.
0 1 1 The next packet is transmitted after
skipping the transmit packet causing the
16COLs.
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