EMC2101-R-ACZL-TR datasheet(12/56 Pages) MICROCHIP

12 / 56 page

EMC2101

DS20006703A-page 12

 2022 Microchip Technology Inc. and its subsidiaries

4.0

GENERAL DESCRIPTION

The EMC2101 is an environmental monitoring device

with a selectable PWM or DAC fan driver output, one

external temperature monitoring channel and one

internal temperature monitor. It contains advanced

circuitry to remove errors induced by series resistance

and CPU thermal diode process differences to provide

accurate temperature measurements and accurate fan

control.

Thermal management is performed automatically. The

EMC2101 reads the temperature from both the

external and internal temperature diodes and uses the

external temperature data to control the fan speed.

The FAN output can be configured as a PWM (default)

or DAC output. The PWM fan driver uses an eight entry

look up table to create a programmable temperature

response. The DAC output provides a linear drive for

the system fan circuit using this same look up table.

Each

temperature

measurement

channel

continuously compared against programmed high

limits. The external diode channel is compared against

a programmed low limit. ALERT/TACH interrupt pin is

asserted if the measured value exceeds the high limit

or drops below the low limit. In addition, the external

diode contains a programmable critical temperature,

TCRIT. If the measured temperature exceeds this

TCRIT an interrupt is asserted on the ALERT/TACH pin

and the fan is set to full on.

Finally, the EMC2101-R (only) has two configuration

modes and two default fan settings based on the value

of the pull-up-resistor on the ALERT/TACH pin. In the

Manual Configuration Mode, the device acts as an

SMBus client and waits to be configured by the system

SMBus host. In the Automatic Configuration mode, the

device automatically queries the SMBus for an

EEPROM

device

and

uploads

configuration

information from the EEPROM into its internal

registers.

Figure 4-1 shows a system level block diagram of the

EMC2101. Figure 4-2 shows a system level block

diagram of the EMC2101-R.

FIGURE 4-1:

System Diagram for EMC2101.

FIGURE 4-2:

System Diagram for EMC2101-R.

EMC2101-R-ACZL-TR Datasheet(PDF) 12 Page - Microchip Technology

EMC2101-R-ACZL-TR Datasheet(HTML) 12 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

Datasheet Download

Link URL