Dual-Data Rate Ssram Tag Pin Usage - Compaq 21264 Hardware Reference Manual

Dual-Data Rate SSRAMs
Table E–4 Dual-Data Rate SSRAM Data Pin Usage (Continued)
21264/EV67 Signal Name or Board
Connection
From board, pulled up to VDD
From board, pulled up to VDD
Unconnected or pulled down to VSS
BcDataOE_L
From board, pulled down to VSS
Table E–5 Dual-Data Rate SSRAM Tag Pin Usage
21264/EV67 Signal Name or Board Connection Dual-Data Rate SSRAM Tag Pin Name
BcAdd_H[23:6]
BcTag_H[33:20]
BcTagOE_L
BcTagWr_L
From board, pulled up to VDD
From board, pulled down to VSS
BcTagInClk_H
BcTagOutClk_H
BcTagOutClk_L
Set from board to 1/2 core voltage
Set from board (implementation-dependent)
BcTagValid_H
BcTagDirty_H
BcTagShared_H
BcTagParity_H
Unconnected or terminated
From board, pulled up to VDD
Unconnected
From board, pulled up to VDD
From board, pulled up to VDD
Unconnected
From board, pulled down to VSS
From board, pulled up to VDD
21264/EV67-to-Bcache Pin Interconnections Alpha 21264/EV67 Hardware Reference Manual
E–4
Dual-Data Rate SSRAM Data Pin Name
TMS_H
TDI_H
TRST_L
OE_L (G_L)
SD/DD_L (B3)
SA_H[17:0]
DQx
LD_L (B1)
R/W_L (B2)
LBO_L
Q_L
SA[19:18]
CQ_H
CK_H
CK_L
VREF1_H
VREF2_H
ZQ_H
DQx
DQx
DQx
DQx
CQ_L
TCK_H
TDO_H
TMS_H
TDI_H
TRST_L
OE_L (G_L)
SD/DD_L (B3)