Intel D425 AU80610006252AA Manual Do Utilizador
Códigos do produto
AU80610006252AA
Processor Configuration Registers
Datasheet
79
Bit Access Default
Value
RST/
PWR
Description
This configuration bit enables (by default) that
all the ranks are refreshed in a staggered/atomic
fashion. If set, the ranks are refreshed in an
independent fashion.
all the ranks are refreshed in a staggered/atomic
fashion. If set, the ranks are refreshed in an
independent fashion.
23 RW 0b Core
Refresh Enable (REFEN):
Refresh is enabled. 0: Disabled 1:
Refresh is enabled. 0: Disabled 1:
Enabled
22 RW 0b Core
DDR Initialization Done (INITDONE):
Indicates that DDR initialization is complete.
Indicates that DDR initialization is complete.
21:20 RW
00b Core
DRAM Refresh Hysterisis
(REFHYSTERISIS):
Hysterisis level - Useful for dref_high watermark
cases. The dref_high flag is set when the
dref_high watermark level is exceeded, and is
cleared when the refresh count is less than the
hysterisis level. This bit should be set to a value
less than the high watermark level. 00: 3
(REFHYSTERISIS):
Hysterisis level - Useful for dref_high watermark
cases. The dref_high flag is set when the
dref_high watermark level is exceeded, and is
cleared when the refresh count is less than the
hysterisis level. This bit should be set to a value
less than the high watermark level. 00: 3
01: 4 10: 5 11: 6
19:18 RW
00b Core
DRAM Refresh Panic Watermark
(REFPANICWM):
When the refresh count exceeds this level, a
refresh request is launched to the scheduler and
the dref_panic flag is set. 00: 5 01: 6
(REFPANICWM):
When the refresh count exceeds this level, a
refresh request is launched to the scheduler and
the dref_panic flag is set. 00: 5 01: 6
10: 7 11: 8
17:16 RW
00b Core
DRAM Refresh High Watermark
(REFHIGHWM):
When the refresh count exceeds this level, a
refresh request is launched to the scheduler and
the dref_high flag is set. 00: 3 01: 4
(REFHIGHWM):
When the refresh count exceeds this level, a
refresh request is launched to the scheduler and
the dref_high flag is set. 00: 3 01: 4
10: 5 11: 6
15:14 RW
00b Core
DRAM Refresh Low Watermark
(REFLOWWM):
When the refresh count exceeds this level, a
refresh request is launched to the scheduler and
the dref_low flag is set. 00: 1 01: 2
(REFLOWWM):
When the refresh count exceeds this level, a
refresh request is launched to the scheduler and
the dref_low flag is set. 00: 1 01: 2
10: 3 11: 4
13:0 RW
00110000
110000b
Core
Refresh Counter Time Out Value
(REFTIMEOUT):
Program this field with a value that will provide
7.8 us at MCLK frequency.
At various MCLK freq's this results in the
following values:
266 MHz -> 820 hex
(REFTIMEOUT):
Program this field with a value that will provide
7.8 us at MCLK frequency.
At various MCLK freq's this results in the
following values:
266 MHz -> 820 hex
333 MHz -> A28 hex
400 MHz -> C30 hex
533 MHz -> 104B hex
666 MHz -> 1450 hex
400 MHz -> C30 hex
533 MHz -> 104B hex
666 MHz -> 1450 hex