6402 datasheet(173/250 Pages) INTEL

173 / 250 page

Intel® 6400/6402 Advanced Memory Buffer Datasheet

173

Registers

14.3.1.7

FBDLIS: FBD Link Initialization Status

This register reports FBD initialization status and is only valid when the link is up since

it is not sticky.

VARLAT: Variable Read Latency Mode

• 1 = Support Variable Read Latency on data returns

• 0 = Not supported

9RO

LAI: Logic Analyzer Interface Mode

• 1 = Support remapping DDR interface as Logic Analyzer Interface

• 0 = Not supported

8RO

DMASK: Data Mask for non-ECC Write Data

• 1 = Support data mask with non-ECC Write

• 0 = Not supported

7RO

L0S: Low Power Link State

• 1 = Support L0s state

• 0 = Not supported

6:2

1Eh

NBWC: Northbound Width Capability

• 1XXXX = 14 bits NB width supported

• X1XXX = 14bits fail over to 13 bits mode supported.

• XX1XX = 13 bits NB width supported

• XXX1X = 13 bits fail over to 12 bits mode supported.

1:0

SBWC: Southbound Width Capability

• X1 = 10 SB bits: Device supports 10-bits and 10-bit fail-over to 9-bits.

Both configurations deliver 72-bits of data payload frame.

•1X = Reserved

Device:

NodeID

Function: 1

Offset:

60h

Bit

Attr

Default

Description

Device:

NodeID

Function: 1

Offset:

64h

Bit

Attr

Default

Description

31:20

Reserved

DATAMERGEERROR: NorthBound Data Merge Error

•1 = NB merge error

ROST

NBMERGEDIS: NorthBound Merge Disable

Set by TS2 packet addressed to it

•1 = Disable NB merge

• Note: state in AMB should be sticky through fast link reset until new TS2

resets bit or hard pin reset

17:12

3Fh

NBWCFG: Northbound width configuration set by TS3

•See table in FBD Architecture & Protocol Specification for full decoding

• [5:4] = Selects 14, 13 or 12 lane operation.

= Protocol Selection[1:0] out TS3 Protocol Selection[3:0]

• [3:0] - Selects none or one lane to map out

= NB Channel Configuration [3:0] in TS3

11:8

SBWCFG: Southbound width capability set by TS3

•See Table in FBD Architecture & Protocol Specification for full decoding

• [3:0] - Selects none or one lane to map out

7RV

Reserved

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