STE10/100 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'STE10/100' PDF : 66 Pages View PDF
STE10/100
Table 6. Control/Status register description
Bit #
Name
Descriptions
Default Val RW Type
7
RDU Receive Descriptor Unavailable
0
RO/LH*
1: when the next receive descriptor can not be obtained by the
STE10/100. The receive process is suspended in this
situation. To restart the receive process, the ownership bit of
the next receive descriptor should be set to STE10/100 and a
receive poll demand command should be issued (if the receive
poll demand is not issued, the receive process will resume
when a new recognized frame is received).
6
RCI
Receive Completed Interrupt
1: when a frame reception is completed.
0
RO/LH*
5
TUF Transmit Under-Flow
0
RO/LH*
1: when an under-flow condition occurs in the transmit FIFO
during transmitting. The transmit process will enter the
suspended state and report the under-flow errror on bit 1 of
TDES0.
4
---
Reserved
3
TJT
Transmit Jabber Timer Time-out
0
RO/LH*
1: when the transmit jabber timer expires. The transmit
processor will enter the stop state and TO (bit 14 of TDES0,
transmit jabber time-out flag) will be asserted.
2
TDU Transmit Descriptor Unavailable
0
RO/LH*
1: when the next transmit descriptor can not be obtained by
the STE10/100. The transmission process is suspended in this
situation. To restart the transmission process, the ownership
bit of the next transmit descriptor should be set to STE10/100
and, if the transmit automatic polling is not enabled, a transmit
poll demand command should then be issued.
1
TPS Transmit Process Stopped.
1: while transmit state = stop
0
RO/LH*
0
TCI
Transmit Completed Interrupt.
0
RO/LH*
1: set when a frame transmission completes with IC (bit 31 of
TDES1) asserted in the first transmit descriptor of the frame.
LH = High Latching and cleared by writing 1.
CSR6(offset = 30h), NAR - Network access register
31~22
---
reserved
21
SF
Store and forward for transmit
0: disable
1: enable, ignore the transmit threshold setting
0
R/W*
20
---
reserved
19
SQE SQE Disable
1
R/W*
0: enable SQE function for 10BASE-T operation. The STE10/
100 provides SQE test function for 10BASE-T half duplex
operation.
1: disable SQE function.
18~16
-----
reserved
19/66
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