MTS Firmware Engineer

AGESA™--Arch2008

CKE_TRI_MAP

Prototype

CKE_TRI_MAP (SocketID, ChannelID, Bit0Map, Bit1Map, Bit2Map, Bit3Map)

Parameters

SocketID

Mask indicating the physical processor socket or sockets. Possible values are:

SOCKET0

SOCKET1

SOCKET2

SOCKET3

SOCKET4

SOCKET5

SOCKET6

SOCKET7

ANY_SOCKET

These values may be combined as follows: SOCKET0 + SOCKET2

ChannelID

A mask indicates the physical channel. Possible values are:

CHA

CHB

CHC

CHD

ANY_CHANNEL

These values may be combined as follows: CHA + CHC

Bit[3:0]Map

Indicating CKE signals connect to which memory chip-selects/ranks.

Description

The CKE pins are identified based on BKDG definition of CKETri bitmap.

Tri-state of unused CKE may save power.

Appendix C Memory Details

282