Intel P4000 - DATASHEET REV 001 - Platform Environmental Control Interface (PECI) DC Specifications; DC Characteristics; Table 7-46 Edp DC Specifications

Datasheet 103
Electrical Specifications
NOTES:
1. V
AUX-DIFFp-p
= 2*|V
AUXP
– V
AUXM
|. Please refer to the VESA DisplayPort Standard specification for more
details.
2. COMP resistance must be provided on the system board with 1% resistors. See the applicable platform
design guide for implementation details. COMP resistors are to V
SS
.
3. eDP_ICOMPO, eDP_ICOMPI, eDP_RCOMPO are the same resistor.
4. These are pre-silicon estimates and are subject to change.
7.11 Platform Environmental Control Interface (PECI)
DC Specifications
PECI is an Intel proprietary interface that provides a communication channel between
Intel processors and chipset components to external Adaptive Thermal Monitor devices.
The processor contains a Digital Thermal Sensor (DTS) that reports a relative die
temperature as an offset from Thermal Control Circuit (TCC) activation temperature.
Temperature sensors located throughout the die are implemented as analog-to-digital
converters calibrated at the factory. PECI provides an interface for external devices to
read the DTS temperature for thermal management and fan speed control. More
detailed information may be found in the Platform Environment Control Interface
(PECI) Specification.
7.11.1 DC Characteristics
The PECI interface operates at a nominal voltage set by V
TT
. The set of DC electrical
specifications shown in Tabl e 7- 4 7 is used with devices normally operating from a V
TT
interface supply. V
TT
nominal levels will vary between processor families. All PECI
devices will operate at the V
TT
level determined by the processor installed in the
system. For specific nominal V
TT
levels, refer to Tab l e 7- 4 3.
Table 7-46.eDP DC Specifications
Symbol Parameter Min Typ Max Units Notes
4
eDP_HPD#
V
IL
Input Low Voltage -0.3 0.3 V
V
IH
Input High Voltage 0.6 1.155 V
eDP_AUX, eDP_AUX#
V
AUX-DIFFp-p
(Tx) AUX Peak-to-Peak Voltage at the
transmitting device
0.39 1.38 1
V
AUX-DIFFp-p
(Rx) AUX Peak-to-Peak Voltage at the
receiving device
0.32 1.36 V 1
eDP COMPs
eDP_ICOMPO Comp Resistance 49.5 50 50.5 Ω 2,3
eDP_ICOMPI Comp Resistance 49.5 50 50.5 Ω 2,3
eDP_RCOMPO Comp Resistance 49.5 50 50.5 Ω 2,3
eDP_RBIAS Comp Resistance 742.5 750 757.5 Ω 2,3