dp83950b National Semiconductor Corporation, dp83950b Datasheet - Page 58

• Manufacturer Part Number: dp83950b
• Description: Dp83950b Rictm Repeater Interface Controller
• Manufacturer: National Semiconductor Corporation

D(5 4)
8 0 RIC Registers
Port Real Time Status Registers (Address 01H to 0DH)
Bit
D0
D1
D2
D3
D6
D7
DISPT
D7
R W
R W
R W
R W
R W
R
R
R
EGP
D6
PTYPE0
PTYPE1
Symbol
GDLNK
DISPT
PTYPE1
PART
COL
REC
SQL
D5
(Continued)
GOOD LINK
0 Link pulses are being received by the port
1 Link pulses are not being received by the port logic
Note Writing a 1 to this bit will cause the 10BASE-T transceiver not the transmit or monitor the reception of link
pulses If the internal 10BASE-T transceivers are not selected or if port 1 (AUI port) is read then this bit is
undefined
COLLISION
0 A collision is happening or has occurred during the current packet
1 No collisions have occurred as yet during this packet
RECEIVE
0 This port is now or has been the receive source of packet or collision information for the
current packet
1 This port has not been the receive source during the current packet
PARTITION
0 This port is partitioned
1 This port is not partitioned
Writing a logic one to this bit forces segment reconnection and partition state machine reset
Writing a zero to this bit has no effect
PARTITION TYPE 0
PARTITION TYPE 1
The partition type bits provide information specifying why the port is partitioned
SQUELCH LEVEL
0 Port operates with normal IEEE receive squelch level
1 Port operates with reduced receive squelch level
Note This bit has no effect when the external transceiver is selected
DISABLE PORT
0 Port operates as defined by repeater operations
1 All port activity is prevented
PTYPE0
D4
PTYPE1
0
0
1
1
PART
D3
PTYPE0
REC
0
1
0
1
D2
58
COL
D1
Consecutive Collision Limit Reached
Excessive Length of Collision Limit Reached
Failure to See Data Loopback from Transceiver in
Monitored Window
Processor Forced Reconnection
GDLNK
D0
Description
Information