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Datasheet 61
Electrical Specifications
Notes:
1. Refer to Chapter 6 for signal description details.
2. DDR{0/1/2/3} refers to DDR3 Channel 0, DDR3 Channel 1, DDR3 Channel 2 and DDR3 Channel 3.
Notes:
1. Refer to Table 7-17 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, 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). The RESET_N signal is used to latch
PROCHOT_N for enabling FRB mode.
2. BIST_ENABLE is sampled at RESET_N de-assertion (on the falling edge).
3. This signal is sampled after PWRGOOD assertion.
Power/Other Signals
Power / Ground V
CC
, V
TTA,
V
TTD,
V
CCD_01,
V
CCD_23,
V
CCPLL,
V
SA and
V
SS
Sense Points
VCC_SENSE
VSS_VCC_SENSE
VSS_VTTD_SENSE
VTTD_SENSE
VSA_SENSE
VSS_VSA_SENSE
Table 7-5. Signal Groups (Sheet 3 of 3)
Differential /
Single Ended
Buffer Type Signals
1
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
DDR{2/3}_PAR_ERR_N Pul-Up VCCD_23 65
TXT_AGENT Pull-Down VSS 2K
SAFE_MODE_BOOT Pull-Down VSS 2K
BIST_ENABLE Pul-Up VTT 2K
TXT_PLTEN Pul-Up VTT 2K
EAR_N Pull-Up VTT 2K 1
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 Intel
®
Trusted Execution Technology (Intel
®
TXT) Platform TXT_PLTEN 3
Power-up Sequence Halt for ITP configuration EAR_N 3
Enable Intel Trusted Execution Technology (Intel TXT) Agent TXT_AGENT 3
Enable Safe Mode Boot SAFE_MODE_BOOT 3