Intel EM64T - Celeron D 336 Boxed Ena User Manual

Board Level PWM and Fan Speed Control Requirements
R
Thermal/Mechanical Design Guide 89
Table 8. ATX FSC Settings
Parameter Classification Processor
Thermal Diode
PWM Output Notes
T
HIGH
Required T
CONTROL
3
T
LOW
Required T
CONTROL
– 10 °C 3
Minimum PWM Duty
Cycle
Required 20%
PWM Frequency Required 21–28 kHz 1
Spin-up time Suggested 250 – ~500 ms 2
T
AVERAGING
Suggested 35 sec
When T
DIODE
< T
LOW
Suggested Minimum PWM%
All Fans ON Suggested T
CONTROL
+ 3 °C
Hysteresis Suggested 2 °C
NOTES:
1. A PWM output set to 25 kHz is the design target for the reference and for the Boxed Intel Processor and
the reference design.
2. Use the lowest time available in this range for the device selected.
3. To ensure compliance with the thermal specification, thermal profile and usage of the T
DIODE
for fan
speed control these setting should not be user configurable.
Table 9. Balanced Technology Extended (BTX) FSC Settings
Parameter Classificatio
n
Processor
Thermal Diode
System
Ambient Diode
PWM Output Notes
T
HIGH
Required T
CONTROL
54 °C 3,5
T
LOW
Required T
CONTROL
– 7 °C 47 °C 3,5
Minimum PWM Duty
Cycle
Required PWM 1 (TMA) -
20%
PWM Frequency Required 21–28 kHz 1
Spin Up Time Suggested 250 – ~ 500 ms 2
T
AVERAGING
Suggested 4.0 sec 4.0 sec 3
When T
DIODE
< T
LOW
Suggested Minimum PWM% Minimum PWM%
All Fans On Suggested T
CONTROL
+ 3 °C 65 °C
Hysteresis Suggested 2 °C 4 °C
NOTES:
1. A PWM frequency of 25 kHz is the design target for the reference and for the Intel
®
Boxed Processor
and the reference design.
2. Use the lowest time available in this range for the device selected
3. T
AVERAGEING
= represents the amount of delay time before responding to the temperature change, defined
in fan speed control device (sometimes called ramp range control or spike smoothing). Please select the
lowest setting available close to 4.0 seconds by the fan speed control device
4. The Fan Speed Controller, or Health Monitor Component, takes the result of the two fan speed ramps
(processor and system) and drives the TMA fan to the highest resulting PWM duty cycle (%)
5. For BTX systems, a second thermal sensor is recommended to capture chassis ambient temperature
(for more detail, see
Appendix E).
6. To ensure compliance with the thermal specification, thermal profile and usage of the T
DIODE
for fan
speed control these setting should not be user configurable.

Intel EM64T - Celeron D 336 Boxed Ena Specifications

General

Brand	Intel
Model	EM64T - Celeron D 336 Boxed Ena
Category	Computer Hardware
Language	English