6402 datasheet(171/250 Pages) INTEL

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Intel® 6400/6402 Advanced Memory Buffer Datasheet

171

Registers

14.3.1.2

FBDS1: FBD Status 1

This register contains copies of status bits returned by the AMB in the most recent

northbound status frame when SYNC command R[1:0] field is 2’b01.

14.3.1.3

FBDS2: FBD Status 2

This register contains copies of status bits returned by the AMB in the most recent

northbound status frame when SYNC command R[1:0] field is 2’b10.

3RO

S3: Northbound Debug Event (1 = asserted, 0 = inactive): This bit is

used to communicate debug events to the host.

2:1

S[2:1]: Thermal Trip: This field indicates various thermal conditions of

the AMB as follows:

• 00 – Below TEMPLO

• 01 – Above TEMPLO

• 10 – Above TEMPMID and falling

• 11 – Above TEMPMID and rising

The TEMPLO threshold is generally used to inform the host to accelerate

refresh events. The TEMPMID threshold is generally used to inform the

host that a thermal limit has been exceeded and that thermal throttling is

needed. Refer to the RAS chapter for more details on thermal

management.

S0: ERROR Asserted: This bit indicates an error has been detected by the

AMB. Errors can be alert or other type.

Device:

NodeID

Function: 1

Offset:

40h

Bit

Att

Default

Description

Device:

NodeID

Function: 1

Offset:

41h

Bit

Att

Default

Description

7:5

Reserved

SP: Parity: This bit contains an odd parity bit that covers the

S[3:0] field.

3:1

Reserved

S0: Data Merge Error: This bit indicates that the northbound

data merge alignment logic of an intermediate AMB cannot

met the timing required to merge its DRAM data into the

northbound data stream when required. Refer to the

initialization chapter for details.

Device:

NodeID

Function: 1

Offset:

42h

Bit

Att

Default

Description

7:5

Reserved

SP: Parity: This bit contains an odd parity bit that covers the

S[3:0] field.

3:0

Reserved

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