6402 datasheet(71/250 Pages) INTEL

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Intel® 6400/6402 Advanced Memory Buffer Datasheet

Errors

6.1

Types of Errors and Responses

The Intel 6400/6402 Advanced Memory Buffer (AMB) detects link errors that could lead

to data corruption. This includes CRC on commands and write data. The AMB also

prevents damage to the machine state.

6.1.1

FBD Link Errors

6.1.1.1

Link Initialization Errors

Table 6-1 shows link errors that can occur during initialization.

Table 6-1.

Link Errors in Initialization

Error

Response

Multi-lane failures - unable to

achieve bit lock on at least 9 of 10

SB lanes

Never come out of training state

Multi-lane failures - unable to

achieve bit lock on at least 12 NB

lanes

Never come out of training state

NB_Data_Merge_Disable - able to

achieve bit lock (pass thru link

data) but internal errors prevent

receiving valid link cmds or

merging data

Host sets NB_Merge_Disable bit in TS2 to cause DIMM to be in a pass-

thru mode both SB and NB - act as a blind repeater

No attempt to decode commands, no response to link register RD/

WR, generate no alerts, neither generate or merge any NB traffic

SMBus access enabled

Single Lane failure - SB and/or NB

Support normal initialization protocol and Fail Over mode if commanded

by host

6402 Datasheet(PDF) 71 Page - Intel Corporation