EMC2103 Standard Microsystems Corporation, EMC2103 Datasheet - Page 49

• Manufacturer Part Number: EMC2103
• Description: Rpm-based Fan Controller with HW Thermal Shutdown
• Manufacturer: Standard Microsystems Corporation

RPM-Based Fan Controller with HW Thermal Shutdown
Datasheet
APPLICATION NOTE: If the fault queue for any channel is currently active (i.e. an out of limit condition has been
SMSC EMC2103
6.12
ADDR
23h
1
0
0
1
1
R/W
R-C
1
0
0
1
1
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.
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.
CONV[1:0]
The Configuration 2 Register is software locked.
Interrupt Status Register
‘1’ - The External Diode channels have digital averaging disabled. The temperature data is the last
measured data.
REGISTER
QUEUE[1:0]
Interrupt
Register
Status
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.
0
0
1
0
1
B7
-
0
0
1
0
1
Table 6.18 Interrupt Status Register
B6
Table 6.17 Conversion Rate
Table 6.16 Fault Queue
TCRIT
DATASHEET
B5
NUMBER OF CONSECUTIVE OUT OF LIMIT CONDITIONS
49
GPIO
B4
CONVERSION RATE
FAN
B3
4 / sec (default)
Continuous
1 / sec
2 / sec
HIGH
1 (disabled)
B2
4 (default)
2
3
LOW
B1
Revision 0.85 (01-29-08)
FAULT
B0
DEFAULT
00h