W311
Byte 3: Control Register
Bit
Bit 7
Pin#
--
Name
Reserved
Default
Description
0
0
Reserved
Bit 6
7
SEL_48MHz
0 = Select 24 MHz as output
1 = Select 48 MHz as output (default).
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
6
7
48MHz
24_48MHz
PCI_F
1
1
1
1
1
1
(Active/Inactive)
(Active/Inactive)
(Active/Inactive)
(Active/Inactive)
(Active/Inactive)
(Active/Inactive)
9
27
26
23
AGP2
AGP1
AGP0
Byte 4: Watchdog Timer Register
Bit
Pin#
Name
Default
Description
Bit 7
-
PCI_Skew1
0
PCI skew control
00 = Normal
01 = –500 ps
10 = Reserved
11 = +500 ps
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
-
PCI_Skew0
0
These bits store the time-out value of the Watchdog
Timer. The scale of the timer is determine by the pre
scaler.
The timer can support a value of 150 ms to 4.8 sec
when the pre-scalar is set to 150 ms. If the pre-scaler
is set to 2.5 sec, it can support a value from 2.5 sec
to 80 sec.
When the Watchdog Timer reaches to “0”, it will set
the WD_To_STATUS bit and generate Reset if
RST_EN_WD is enabled
-
-
-
-
WD_TIMER4
WD_TIMER3
WD_TIMER2
WD_TIMER1
1
1
1
1
Bit 0
-
WD_TIMER0
1
0 = 150 ms
1 = 2.5 sec
Byte 5: Control Register 5
Bit
Pin#
6
Name
Default
Description
0 = Norm, 1 = High Drive
0 = Norm, 1 = High Drive
(Active/Inactive)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
48Mhz_DRV
1
1
1
1
0
0
1
1
7
24_48MHz_DRV
APIC1
44
45
-
APIC0
(Active/Inactive)
Reserved
Reserved
REF1
Reserved
-
Reserved
47
48
(Active/Inactive)
REF0
(Active/Inactive)
Rev 1.0,November 25, 2006
Page 6 of 18
SPECTRALINEAR [ SPECTRALINEAR INC ]
