Datasheet

Functional Description
268 Datasheet
10.1.5 APIC Cluster Mode Support
APIC Cluster mode support is required for backwards compatibility with existing
software, including various operating systems.
The MCH supports three types of interrupt re-direction:
• Physical
•Flat-Logical
• Clustered-Logical
Table 17. Host Interface 4X, 2X, and 1X Signal Groups
Signals Associated Clock or Strobe Signal Group
ADS#, BNR#, BPRI#, DEFER#,
DBSY#, DRDY#, HIT#, HITM#,
LOCK#, RS[2:0]#, TRDY#,
RESET, BR0#
BCLK
1X
HA[16:3]#, REQ[4:0]# ADSTB[0]#
2X
HA[35:17]# ADSTB[1]#
D[15:0]#, DBI0# DSTBP0#, DSTBN0#
4X
D[31:16]#, DBI1# DSTBP1#, DSTBN1#
D[47:32]#, DBI2# DSTBP2#, DSTBN2#
D[63:48]#, DBI3# DSTBP3#, DSTBN3#