EMC2113 datasheet(81/88 Pages) MICROCHIP

81 / 88 page

RPM-Based Fan Controller with Multiple Temperature Zones & Hardware Thermal Shutdown

Datasheet

 2013 Microchip Technology Inc.

DS20005251A-page 81

A.1.1

LUT Configuration Bit Description

Bit 7 - USE_DTS_F1 = ‘0b’ tells the circuitry that the Forced Temperature 1 register data is not in DTS

format.

Bit 6 - USE_DTS_F2 = ‘0b’ tells the circuitry that the Forced Temperature 2 register data is not in DTS

format.

Bit 5 - LUT_LOCK = ‘1b’ tells the circuitry that the LUT is programmed and is active. This bit must be

set for the LUT to function.

Bit 4 - RPM / PWM = ‘1b’ tells the Look Up Table that the FSC algorithm is not used and that the LUT

target values will be PWM drive settings instead of TACH Target settings.

Bit 3 - PUSH1_CFG = ‘0b’ tells the circuitry that the LUT should referenced the Forced Temperature

data instead of the PWM Input Duty Cycle data. This is the default setting.

Bit 2 - TEMP1_CFG = ‘0b’ tells the LUT to reference the External Diode 1 data instead of Forced

Temperature 1 data. This is the default setting.

Bit 1 - TEMP3_CFG = ‘0b’ tells the LUT to reference the External Diode 3 data instead of Forced

Temperature 1 data. This is the default setting.

Bit 0 - TEMP4_CFG = ‘0b’ tells the LUT to reference the Internal Diode data instead of Forced

Temperature 2 data. This is the default setting.

Note: The values shown in Table A.3 are example settings. All the cells in the look-up table are

programmable via SMBus.

Table A.2 Look Up Table Example #1 Configuration

ADDR

SETTING

50h

LUT

Configuration

USE_

DTS_F1

USE_

DTS_F2

LUT_

LOCK

RPM /

PWM

PUSH1_

CFG

TEMP1_

CFG

TEMP3_

CFG

TEMP4_

CFG

C0h

Table A.3 Fan Speed Control Table Example #1

FAN

SPEED

STEP #

EXTERNAL DIODE

1 TEMPERATURE

(CPU)

EXTERNAL

DIODE 2

TEMPERATURE

(GPU)

EXTERNAL DIODE

3 TEMPERATURE

(SKIN)

INTERNAL DIODE

TEMPERATURE

(AMBIENT)

PWM

SETTINGS

135oC60oC30oC40oC0%

240oC70oC35oC45oC

30%

350oC75oC40oC50oC

40%

460oC80oC45oC55oC

50%

570oC85oC50oC60oC

60%

680oC90oC55oC65oC

70%

790oC95oC60oC70oC

80%

100oC

100oC65oC75oC

100%

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