LXT9860 Datasheet, PDF (45/118 Pages) Intel Corporation – Advanced 10/100 Repeater with Intergrated Management

Advanced 10/100 Repeater with Integrated Management — LXT9860/9880
3.7.6.2 LED Mode 2
Mode 2 operations are described in Table 16.
Table 16. LED Mode 2 Indications
LED
Operating
Mode
Hardware Control¹
On
Blink
Off
Software
Control
PORTnLED1
Any
10 Mbps:
Port_Enabled,
Link_OK, not
Port_Partitioned
100 Mbps:
Port_Enabled,
Link_OK, not
Port_Partitioned
10 Mbps:
Port_Enabled,
Link_OK, and
Port_Partitioned
(slow blink)
100 Mbps:
Port_Enabled,
Port_Partitioned
(Slow Blink)
Any other state
On, Off or
Fast Blink
via Port
LED
Control
Register
PORTnLED2
Rcv_Activity
(20 ms pulse)²
N/A
Any other state N/A
PORTnLED3
Auto-
negotiate
enabled
AUTOBLINK
active
AUTOBLINK
inactive
Auto-negotiate disabled
100 Mbps
Link_OK
100 Mbps mode
selected
(Link_Enabled)
No Link_OK
(Fast Blink)
N/A
10 Mbps
Link_OK
10 Mbps mode
selected
(Link_Enabled)
Off via Port
LED
Control
Register
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 µs
when the LXT98x0 detects a collision on the
segments. During the time that the LED is on, any
N/A
additional collisions are ignored by the collision LED
logic.
The activity LEDs turn on for approximately 4 ms
when the LXT98x0 detects any activity on the
segments. During the time that the LED is on, any
additional activity is ignored by the activity LED logic.
Manager
Present
N/A
N/A
Always Off
N/A
RPS
RPS_Present,
no RPS_Fault
RPS_Present,
RPS_Fault
(Slow Blink)
Not
RPS_Present
N/A
Any
Global
FAULT
Any
Port_Partitioned,
On, off, or
any Port Isolated
slow blink
N/A
or
RPS_Fault and
Any other state
via global
LED
RPS_Present
Control
Register
(Slow Blink)
1. Refer to Table 14: 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.
Datasheet
Document #: 248987
Revision#: 003
Rev Date: 08/07/01
45