Errors
6
6.1
Errors
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
6.1.1.1
FBD Link Errors
Link Initialization Errors
shows link errors that can occur during initialization.
Table 6-1.
Link Errors in Initialization
Error
Multi-lane failures - unable to
achieve bit lock on at least 9 of 10
SB lanes
Multi-lane failures - unable to
achieve bit lock on at least 12 NB
lanes
NB_Data_Merge_Disable - able to
achieve bit lock (pass thru link
data) but internal errors prevent
receiving valid link cmds or
merging data
Single Lane failure - SB and/or NB
Response
Never come out of training state
Never come out of training state
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
1.
No attempt to decode commands, no response to link register RD/
WR, generate no alerts, neither generate or merge any NB traffic
2.
SMBus access enabled
Support normal initialization protocol and Fail Over mode if commanded
by host
Intel® 6400/6402 Advanced Memory Buffer Datasheet
71
INTEL [ INTEL CORPORATION ]
