EMC2103 datasheet(49/84 Pages) SMSC

49 / 84 page

RPM-Based Fan Controller with HW Thermal Shutdown

Datasheet

SMSC EMC2103

Revision 0.85 (01-29-08)

DATASHEET

‘1’ - The External Diode channels have digital averaging disabled. The temperature data is the last

measured data.

Bits 3-2 - QUEUE[1:0] - Determines the number of consecutive out of limit conditions that are

necessary to trigger an interrupt. Each measurement channel has a separate fault queue associated

with the high limit, low limit, and diode fault condition.

APPLICATION NOTE: If the fault queue for any channel is currently active (i.e. an out of limit condition has been

detected and caused the fault queue to increment) then changing the settings will not take

effect until the fault queue is zeroed. This occurs by the ALERT pin asserting or the out of

limit condition being removed.

Bit 1 - 0 - CONV[1:0] - determines the conversion rate of the temperature monitoring. This conversion

rate does not affect the fan driver. The supply current from VDD_3V is nominally dependent upon the

conversion rate and the average current will increase as the conversion rate increases.

The Configuration 2 Register is software locked.

6.12

Interrupt Status Register

Table 6.16 Fault Queue

QUEUE[1:0]

NUMBER OF CONSECUTIVE OUT OF LIMIT CONDITIONS

1 (disabled)

4 (default)

Table 6.17 Conversion Rate

CONV[1:0]

CONVERSION RATE

1 / sec

2 / sec

4 / sec (default)

Continuous

Table 6.18 Interrupt Status Register

ADDR

R/W

DEFAULT

23h

R-C

Interrupt

Status

TCRIT

GPIO

FAN

HIGH

LOW

FAULT

00h

EMC2103 Datasheet(PDF) 49 Page - SMSC Corporation

EMC2103 Datasheet(HTML) 49 Page - SMSC Corporation

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

Datasheet Download

Link URL