6402 datasheet(217/250 Pages) INTEL

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Intel® 6400/6402 Advanced Memory Buffer Datasheet

217

Registers

14.6.1.20 DQSOFCS12: DQS Calibration Register

This register determines DQS17 & 8 fine DQS delay when reading from rank 1.

14.6.1.21 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

nibble 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.

14.6.1.22 WPTRTC0: Write Pointer Timing Control 0

This register determines the DDR I/O FIFO write pointer fine delay timing for all DQS

signals except DQS17 and DQS8 when reading from rank 0 or rank 1.

Device:

NodeID

Function: 4

Offset:

C7h

Bit

Attr

Default

Description

7:4

RWST

DQS17: Fine DLL delay

3:0

RWST

DQS08: Fine DLL delay

Device:

NodeID

Function: 4

Offset:

CCh

Bit

Attr

Default

Description

31:28

RWST

DQS1607: DQS16 and DQS7 write pointer fine delay

27:24

RWST

DQS1506: DQS15 and DQS6 write pointer fine delay

23:20

RWST

DQS1405: DQS14 and DQS5 write pointer fine delay

19:16

RWST

DQS1304: DQS13 and DQS4 write pointer fine delay

15:12

RWST

DQS1203: DQS12 and DQS3 write pointer fine delay

11:8

RWST

DQS1102: DQS11 and DQS2 write pointer fine delay

7:4

RWST

DQS1001: DQS10 and DQS1 write pointer fine delay

3:0

RWST

DQS0900: DQS9 and DQS0 write pointer fine delay

6402 Datasheet(PDF) 217 Page - Intel Corporation

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