IDT 89HPES16NT2, User Manual

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IDT Non-Transparent Mode Operation
PES16NT2 User Manual 10 - 153 April 15, 2008
Notes
PCEE_FOVRTIMER - Failover Watchdog Timer (0x230)
3 DFHRST RW 0x0
Sticky
Disable Failover Hot Reset. When this bit is set, hot
resets due to the data link layer of the upstream or NTB
ports transitioning to the DL_Down caused by a failover
are disabled.
4 IDLDHRST RW 0x0
Sticky
Internal Hierarchy Disable Link Down Hot Reset. When
this bit is set, hot resets due to the data link layer of the
upstream port transitioning to the DL_Down state are dis-
abled.
5 EDLDHRST RW 0x0
Sticky
External Hierarchy Disable Link Down Hot Reset.
When this bit is set, hot resets due to the data link layer of
the NTB port transitioning to the DL_Down state are dis-
abled.
6 IDHRSTPROP RW 0x0
Sticky
Internal Hierarchy Disable Hot Reset Propagation.
When this bit is set, hot resets received on the upstream
port are ignored.
7 EDHRSTPROP RW 0x0
Sticky
External Hierarchy Disable Hot Reset Propagation.
When this bit is set, hot resets received on the NTB port
are ignored.
31:8 Reserved RO 0x0 Reserved field.
Bit
Field
Field
Name
Type
Default
Value
Description
31:0 COUNT RW 0x0
Sticky
Watchdog Timer Count. This field contains the current
watchdog timer count value.
The value in this field is decremented by one every micro-
second (1 uS). When this field reaches zero, it stops dec-
rementing and the timer is said to have expired.
When the value of this field transitions from one to zero,
the Upstream Port Timer Failover Enable (TIMFEN) bit is
set in the NTB Upstream Port Failover Control (NUS-
PFCTL) register, then an NTB upstream failover is initi-
ated.
Bit
Field
Field
Name
Type
Default
Value
Description