參數(shù)資料
型號(hào): 9863
廠商: Intel Corp.
英文描述: Advanced 10/100 Umnmanaged Repeater
中文描述: 高級(jí)10/100 Umnmanaged直放站
文件頁數(shù): 28/56頁
文件大小: 719K
代理商: 9863
LXT9883/9863
Advanced 10/100 Unmanaged Repeater
28
Datasheet
Document #: 249115
Revision #: 003
Rev. Date: 08/07/01
3.6.6.4
LED Mode 4
Mode 4 operations are described in
Table 14
.
3.7
IRB Operation
The Inter-Repeater Backplane (IRB) allows multiple devices to operate as a single logical repeater,
exchanging data and collision status information. Each segment on the LXT98x3 has its own
complete, independent IRB. The backplanes use a combination of digital and analog signals as
shown in
Figure 8 on page 30
.
3.7.1
IRB Signal Types
IRB signals can be characterized by the following connection types (For Stacking and Cascading
connections, see
Table 15 on page 30
):
Local
connected between devices on the same board
Stack
connected between boards
Full
connected between devices in the same board
and
between boards.
Table 14. LED Mode 4 Indications
LED
Operating Mode
Hardware Control
1
On
Blink
Off
PORT
n
LED1
10 Mbps operation
Link_OK, not Port_Partitioned
20 ms Blink
indicates
Rcv_Activity
2
Any other state
100 Mbps operation
Any other state
PORT
n
LED2
10 Mbps operation
Link_OK, Port_Partitioned
N/A
Any other state
100 Mbps operation
PORT
n
LED3
AUTOBLINK active
100M Link_OK
No Link_OK
(Fast Blink))
10M Link_OK
AUTOBLINK inactive
N/A
Collision and
Activity LEDs
Any
The collision and activity LEDs are on a Per Segment basis. Pulse
stretchers are used to extend the on-time for the LEDs. For every on-cycle
of the stretched LEDs, an off-cycle, with the same period as the on-cycle,
always follows.
The collision LEDs turn on for approximately 120
μ
s when the LXT98x3
detects a collision on the segments. During the time that the LED is on, any
additional collisions are ignored by the collision LED logic.
The activity LEDs turns on for approximately 4 ms when the LXT98x3
detects any activity on the segments. During the time that the LED is on,
any additional activity is ignored by the activity LED logic.
Global
Fault
Any
Any port partitioned or
RPS_Fault and
RPS_ Present
N/A
Any other state
RPS Fault
Any
RPS_Fault and
RPS_ Present
1. Refer to
Table 10
: LED Terms, which defines all key terms used in this section.
2. Receive activity is stretched to a 20 ms wide pulse. For every on-cycle of the stretched LEDs, an off-cycle, with the same
period as the on-cycle, always follows.
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