EP80579 Datasheet, PDF (620/1916 Pages) Intel Corporation – Intel® EP80579 Integrated Processor Product Line

Intel^® EP80579 Integrated Processor
16.5.1.21 WPTRTC DDR I/O Write Pointer Timing
The two WPTRTC registers control the fine delay of the DDR I/O FIFO write pointers.
The formulas for delay shown in the DQSOFCS and DRRTC register sections are
identical to the write pointer delay formulas. To find the WPTRTC portion of write
pointer delay, use the DQSOFCS formulas, and substitute WPTRTC fields for all the
DQSOFCS fields. The only difference in the application of these formulas is that there is
only one WPTRTC field per byte of the DDR I/O, whereas the DQSOFCS has a field per
byte per rank. The total write pointer delay, measured from the same reference point
as the DQS receiver enable timing, is equal to the DQS receiver enable timing,
including the quarter clock and sub-quarter clock delays, plus one full clock cycle, plus
the coarse and fine DRAMDLLC.SLVLEN/WPTRTC delays calculated with the formulas
from the DQSOFCS register section.
16.5.1.22 Offset CCh: WPTRTC0 - Write Pointer Timing Control 0 Register
This register determines the DDR I/O FIFO write pointer fine delay timing for all DQS
signals except DQS8 when reading from rank 0 or rank 1.
Table 16-246.Offset CCh: WPTRTC0 - Write Pointer Timing Control Register
Description: WPTRTC0: Write pointer timing control
View: PCI
BAR: SMRBASE
Bus:Device:Function: 0:0:0
Offset Start: CCh
Offset End: CFh
Size: 32 bit
Default: 00000000h
Power Well: Core
Bit Range
31 :28
27 :24
23 :20
19 :16
15 :12
11 :08
7 :04
3 :00
Bit Acronym
Bit Description
DQS07
DQS06
DQS05
DQS04
DQS03
DQS02
DQS01
DQS00
DQS7 write pointer fine delay
DQS6 write pointer fine delay
DQS5 write pointer fine delay
DQS4 write pointer fine delay
DQS3 write pointer fine delay
DQS2 write pointer fine delay
DQS1 write pointer fine delay
DQS0 write pointer fine delay
Sticky
Y
Y
Y
Y
Y
Y
Y
Y
Bit Reset
Value
0h
0h
0h
0h
0h
0h
0h
0h
Bit Access
RW
RW
RW
RW
RW
RW
RW
RW
Intel^® EP80579 Integrated Processor Product Line Datasheet
620
August 2009
Order Number: 320066-003US