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26
64-bit Intel
Xeon Processor MP with up to 8MB L3 Cache Datasheet
Electrical Specifications
NOTES:
1. Refer to
Section 6.1
for signal descriptions.
NOTES:
1. Signals not included in the “Signals with R
TT
” list require termination on the baseboard. Please refer to
Table 2-5
for the signal type and
Table 2-13
to
Table 2-18
for the corresponding DC specifications.
2. The BOOT_SELECT pin is not terminated to R
TT
. It has a 500-5000
internal pullup.
The ODTEN signals enables or disables R
TT
. Those signals affected by ODTEN still present R
TT
termination to the signal’s pin when the processor is placed in tri-state mode.
Furthermore, the following signals are not affected when the processor is placed in tri-state mode:
BSEL[1:0], CVID[3:0], SKTOCC#, SM_ALERT#, SM_CLK, SM_DAT, SM_EP_A[2:0],
SM_TS_A[1:0], SM_WP, TEST_BUS, TESTHI[6:0], VID[5:0], and VTTEN.
NOTES:
1. These signals also have hysteresis added to the reference voltage. See
Table 2-16
for more information.
Front Side Bus Clock Input
Clock
BCLK[1:0]
SMBus
Synchronous to SM_CLK
SM_ALERT#, SM_CLK, SM_DAT,
SM_EP_A[2:0], SM_TS_A[1:0], SM_WP
Power/Other
Power/Other
BOOT_SELECT, BSEL[1:0], COMP0,
CVID[3:0], GTLREF[3:0], ODTEN,
PWRGOOD, RESERVED, SKTOCC#,
SLEW_CTRL, SM_VCC, TEST_BUS,
TESTHI[6:0], V
CACHE
, V
CC
, V
CCA
,
V
CCA_CACHE
, V
CC_CACHE_SENSE
, V
CCIOPLL
,
V
CCPLL
CCSENSE
V
SS
SSA
SSA_CACHE
, V
SS_CACHE_SENSE
,
V
SSSENSE
, V
TT
Table 2-5. Front Side Bus Pin Groups (Sheet 2 of 2)
Signal Group
Type
Signals
1
Table 2-6. Signal Description Table
Signals with R
TT1
A[39:3]#, ADS#, ADSTB[1:0]#, AP[1:0]#, BINIT#, BNR#, BOOT_SELECT
2
, BPRI#, D[63:0]#, DBI[3:0]#,
DBSY#, DEFER#, DEP[7:0]#, DP[3:0]#, DRDY#, DSTBN[3:0]#, DSTBP[3:0]#, HIT#, HITM#, ID[7:0]#, IDS#,
LOCK#, MCERR#, OOD#, REQ[4:0]#, RS[2:0]#, RSP#, TRDY#
Signals with R
L
BINIT#, BNR#, HIT#, HITM#, MCERR#
Table 2-7. Signal Reference Voltages
GTLREF
V
TT
/ 2
A20M#, A[39:3]#, ADS#, ADSTB[1:0]#, AP[1:0]#,
BINIT#, BNR#, BPM[5:0]#, BPRI#, BR[3:0]#,
D[63:0]#, DBI[3:0]#, DBSY#, DEFER#, DEP[7:0]#,
DP[3:0]#, DRDY#, DSTBN[3:0]#, DSTBP[3:0]#,
FORCEPR#, HIT#, HITM#, ID[7:0]#, IDS#, IGNNE#,
INIT#, LINT0/INTR, LINT1/NMI, LOCK#, MCERR#,
ODTEN, OOD#, REQ[4:0]#, RESET#, RS[2:0]#,
RSP#, SMI#, STPCLK#, TRDY#
BOOT_SELECT, PWRGOOD
1
, TCK
1
, TDI
1
, TMS
1
,
TRST#
1
, VIDPWRGD