EMC2113 datasheet(67/88 Pages) MICROCHIP

67 / 88 page

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

Datasheet

 2013 Microchip Technology Inc.

DS20005251A-page 67

7.34

Look Up Table Configuration Register

The Look Up Table Configuration Register controls the setup information for the temperature to fan

drive look up table.

APPLICATION NOTE: This register is duplicated at 50h as well as 7Dh for ease of programming using block write

mode. Example: Set register 50h to unlock the table and register 7Dh to lock the table.

The External Diode 2 channel is always used as the Temperature 2 input to the Fan Control Look Up

Table.

Bit 7 - USE_DTS_P1 - This bit determines whether the Pushed Temperature 1 Register is using DTS

data.



‘0’ (default) - The Pushed Temperature 1 Register is not using DTS data. The contents of the

Pushed Temperature 1 registers are standard temperature data.



‘1’ - The Pushed Temperature 1 Register is loaded with DTS data. The contents of this register are

automatically subtracted from a fixed value of 100°C before being compared to the Look Up Table

threshold levels.

Bit 6 - USE_DTS_P2 - This bit determines whether the Pushed Temperature 2 Register is using DTS

data.



‘0’ (default) - The Pushed Temperature 2 Register is not using DTS data. The contents of this



‘1’ - The Pushed Temperature 2 Register is loaded with DTS data. The contents of this register are

automatically subtracted from a fixed value of 100°C before being compared to the Look Up Table

threshold levels.

Bit 5 - LUT_LOCK - This bit locks updating the Look Up Table entries and determines whether the look

up table is being used.



‘0’ (default) - The Look Up Table entries can be updated normally. The Look Up Table will not be

used while the Look Up Table entries are unlocked. During this condition, the PWM output will not

change states regardless of temperature or tachometer variation.

where:

[4]

poles = number of poles of the fan

(typically 2)

n = number of edges measured

(typically 5)

m = the multiplier defined by the

RANGE bits

[5]

COUNT = TACH Reading Register

value (in decimal)

Table 7.51 Look Up Table Configuration Register

ADDR

R/W

DEFAULT

50h

R/W

LUT

Configuration

USE_

DTS_P1

USE_

DTS_P2

LUT

LOCK

RPM /

PWM

PUSH1_

CFG

TEMP1_

CFG

TEMP3_

CFG

TEMP4_

CFG

00h

7Dh

RPM

poles



--------------------

–



COUNT

-----



----------------------------------

1,966,080



RPM

3,932,160



COUNT

--------------------------------------

EMC2113 датащи(PDF) 67 Page - Microchip Technology

EMC2113 датащи(HTML) 67 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88

датащи скачать

ссылки URL