NH82801FBM S L89K Intel, NH82801FBM S L89K Datasheet - Page 314

• Manufacturer Part Number: NH82801FBM S L89K
• Manufacturer: Intel

Specifications of NH82801FBM S L89K

• Lead Free Status / RoHS Status: Compliant

LAN Controller Registers (B1:D8:F0)
8.3.8
.
8.3.9
314
Note: The heartbeat timer controls the heartbeat status packet frequency. The timer is free-running and
RETRAN_INT—Retransmission Interval Register
HEART_TIM—Heartbeat Timer Register
(ASF Controller—B1:D8:F0)
Offset Address:
Default Value:
The HeartBeat Timer register implements the heartbeat timer. This defines the period of the
heartbeats packets. It contains a down counting value when enabled and the time-out value when
the counter is disabled. The timer can be configured and enabled in a single write.
the configured time is only valid from one heartbeat to the next. When enabled by software, the
next heartbeat may occur in any amount of time less than the configured time.
(ASF Controller—B1:D8:F0)
Offset Address:
Default Value:
This register implements the retransmission timer. This is the time between packet transmissions
for multiple packets due to a SOS.
Bit
7:1
Bit
7:1
0
0
Heartbeat Timer Value (HBT_VAL) — R/W. Heartbeat timer load value in 10.7-second resolution.
This field can only be written while the timer is disabled. (10.7 sec – 23 min range). Read as load
value when HBT_ENA=0. Read as decrementing value when HBT_ENA=1. Timer resolution is
10.7 seconds. A value of 00h is invalid.
Timer Enable (HBT_ENA) — R/W.
0 = Disable
1 = Enable / Reset Counter
Retransmit Timer Value (RTM_VAL) — R/W. Retransmit timer load value 2.7 second resolution.
This field is always writable (2.7 sec – 5.7 min range). Timer is accurate to +0 seconds, –
0.336 seconds. Reads always show the load value (decrement value never shown). A value of 00h
is invalid.
Reserved
E9h
02h
EAh
02h
Intel
Description
Description
®
I/O Controller Hub 6 (ICH6) Family Datasheet
Attribute:
Size:
Attribute:
Size:
R/W
R/W
8 bits
8 bits