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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#)