Intel Video Game Controller Intel Gigabit Ethernet Controllers User Manual

Page of 406
Software Developer’s Manual
285
Register Descriptions
13.4.15
LED Control
1
LEDCTL (00E00h; RW)
RxConfig
29
0b
/C/ order set reception indication
0b = Receive idle/data stream.
1b = Receiving /C/ order sets.
Provides an indication as to whether the interface is 
receiving /C/ order set, or normal idle/data stream.
82544GC/EI only:
Valid only in software Auto-Negotiation mode 
(TXCW.ANE = 0b).
RxSynchronize
30
0b
Lost bit synchronization indication
0b = Lost synchronization.
1b = Bit synchronization (bit is LL).
Used to qualify all other bits in the register (when in 
software Auto-Negotiation).
Each time the Ethernet controller loses bit synchronization, 
this bit becomes ‘0b’ and stays ‘0b’ until read by software.
82544GC/EI only:
Valid only in software Auto-Negotiation mode 
(TXCW.ANE = 0b).
ANC
31
0b
Auto Negotiation Complete
0b = The contents of the register are undefined in hardware 
Auto-Negotiation mode (TXCW.ANE = 1b)
1b = The contents of the register are valid in hardware Auto-
Negotiation mode. 
Reports the status as required in sub-clause 22.2.4.2.11. 
This bit remains cleared from the time Auto-Negotiation is 
reset until Auto-Negotiation reaches the “LINK_OK” state.
It remains set until Auto-Negotiation is disabled or restarted. 
This bit has meaning only if TXCW.ANE = 1b. If software 
Auto-Negotiation is used, it always reads 0b and should be 
ignored.
Field
Bit(s)
Initial 
Value
Description
1.
Not applicable to the 82544GC/EI.
31 - 24
23 - 16
15 - 8
7 - 0
LED3 (LINK1000#)
LED2 (LINK100#)
LED1 ACTIVITY#)
LED0 (LINK_UP#)