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Electrical Specifications
164 Intel® Xeon® Processor E5-1600/E5-2600/E5-4600 Product Families
Datasheet Volume One
Notes:
1. Please refer to the applicable platform design guide to change the default states of these signals.
2. Refer to Table 7-20 for details on the R
ON
(Buffer on Resistance) value for this signal.
7.3 Power-On Configuration (POC) Options
Several configuration options can be configured by hardware. The processor samples
its hardware configuration at reset, on the active-to-inactive transition of RESET_N, or
upon assertion of PWRGOOD (inactive-to-active transition). For specifics on these
options, please refer to Table 7-7.
The sampled information configures the processor for subsequent operation. These
configuration options cannot be changed except by another reset transition of the
latching signal (RESET_N or PWRGOOD).
Notes:
1. Output tri-state option enables Fault Resilient Booting (FRB), for FRB details see Section 7.4. The signal
used to latch PROCHOT_N for enabling FRB mode is RESET_N.
2. BIST_ENABLE is sampled at RESET_N de-assertion and CPU_ONLY_RESET de-assertion (on the
falling edge).
3. This signal is sampled after PWRGOOD assertion.
Table 7-6. Signals with On-Die Termination
Signal Name
Pull Up /Pull
Down
Rail Value Units Notes
DDR{0/1}_PAR_ERR_N Pull Up VCCD_01 65 Ω
DDR{2/3}_PAR_ERR_N Pull Up VCCD_23 65 Ω
BMCINIT Pull Down VSS 2K Ω 1
FRMAGENT Pull Down VSS 2K
Ω 1
TXT_AGENT Pull Down VSS 2K
Ω 1
SAFE_MODE_BOOT Pull Down VSS 2K
Ω 1
SOCKET_ID[1:0] Pull Down VSS 2K
Ω 1
BIST_ENABLE Pull Up VTT 2K
Ω 1
TXT_PLTEN Pull Up VTT 2K
Ω 1
EAR_N Pull Up VTT 2K
Ω 2
Table 7-7. Power-On Configuration Option Lands
Configuration Option Land Name Notes
Output tri state PROCHOT_N 1
Execute BIST (Built-In Self Test) BIST_ENABLE 2
Enable Service Processor Boot Mode BMCINIT 3
Enable Intel TXT Platform
TXT_PLTEN 3
Power-up Sequence Halt for ITP configuration EAR_N 3
Enable Bootable Firmware Agent FRMAGENT 3
Enable Intel TXT Agent TXT_AGENT 3
Enable Safe Mode Boot SAFE_MODE_BOOT 3
Configure Socket ID SOCKET_ID[1:0] 3