6402 datasheet(96/250 Pages) INTEL

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Reset

Intel® 6400/6402 Advanced Memory Buffer Datasheet

9.4.5

Timing Diagrams

Figure 9-1. Cold Power-Up Reset

Figure 9-2. AMB Fast Reset Sequence

1.5, 3.3 V supplies

Ref clk

RE SET#

CKE

1.8 V supply

S table

Quiet

SM Bus

P gm phys link regs

D isabled

FB D link

Link init and cal

AM B config

B ring up D R A M ifc

Inputs to A M B

O utputs from A M B

At least 2 m sec

A t least 200 usec

DRA M clk

Stable

Nxt

C ur updated

by this tim e

A M B C o ld P o w er-U p R eset S eq uen ce

Inputs: value irrelevant .

O utputs: value unknow n

Link init

RESET# high

CKE

Power supplies and

Ref clk stable

Secondary NB FBD

Inputs to AMB

Outputs from AMB

DRAM clks

Stable

Nxt

Cur updated

by this time

AMB Fast Reset Sequence

(DISSREXIT not Set)

0001

TS0

TS1

TS3

TS2

Primary SB FBD

DRAM Commands

on-going

TS0

Secondary SB FBD

TS0

Primary NB FBD

0's

TS0

SRF Exit

SRF Entry

Non-Sticky Reset

Precharge All

& AutoRefresh

Stable

May change

TS1

TS3

TS2

TS1

TS3

TS2

TS1

TS3

TS2

0's

SRF Exit

Internal Signals

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