Advanced Configuration and Power Interface Specification

Advanced Configuration and Power Interface Specification
Name Description Heading
_TC2
_TDL
_TFP
_TIP
Thermal Constant 2 – returns TC2 for the passive cooling
formula.
T-State Depth Limit – returns the _TSS entry number of the
lowest power throttling state.
Thermal Fast Sampling Period - returns the thermal sampling
period for passive cooling.
Expired Timer Wake Policy – returns timer policies of the wake
alarm device.
Section 11.4.15 page 618
Section 8.4.5.5 page 469
Section 11.4.16 page 619
Section 9.18.9 page 546
_TIV Timer Values – returns remaining time of the wake alarm Section 9.18.10 page 547
device.
_TMP Temperature – returns a thermal zone’s current temperature. Section 11.4.17 page 619
_TPC
_TPT
_TRA
_TRS
_TRT
Throttling Present Capabilities – returns the current number of
supported throttling states.
Trip Point Temperature – inform AML that a devices’
embedded temperature sensor has crossed a temperature trip
point.
Translation – address translation offset, resource descriptor
field.
Translation Sparse – sparse/dense flag, resource descriptor
field.
Thermal Relationship Table – returns thermal relationships
between platform devices.
Section 8.4.5.3 page 464
Section 11.4.18 page 619
Section 19.2.8 page 778
Section 19.2.8 page 778
Section 11.4.19 page 620
_TSD Throttling State Dependencies – returns a list of T-state Section 8.4.5.4 page 465
dependencies.
_TSF Type-Specific Flags – resource descriptor field. Section 19.2.8 page 778
_TSN
_TSP
_TSS
_TST
Thermal Sensor Device - returns a reference to the thermal
sensor reporting a zone temperature
Thermal Sampling Period – returns the thermal sampling
period for passive cooling.
Throttling Supported States – returns supported throttling state
information.
Temperature Sensor Threshold – returns the minimum
separation for a device’s temperature trip points.
Section 11.4.20 page 621
Section 11.4.21 page 621
Section 8.4.5.2 page 463
Section 11.4.22 page 621
_TTP Translation Type – translation/static flag, resource descriptor Section 19.2.8 page 778
field.
_TTS Transition To State – inform AML of an S-state transition. Section 7.4.4 page 415
_TXL Transmit Buffer Size – Size of the transmit buffer in a UART Section 19.6 page 809
Serialbus connection, resource descriptor field
_TYP Type – DMA channel type (speed), resource descriptor field. Section 19.2.8 page 778
_TZ Thermal Zone – predefined scope: ACPI 1.0. Section 5.3.1 page 214
_TZD
Thermal Zone Devices – returns a list of device names
associated with a Thermal Zone.
Section 11.4.23 page 622
268 April, 2015 Version 6.0