EMC2101-ACZL SMSC, EMC2101-ACZL Datasheet - Page 37

• Manufacturer Part Number: EMC2101-ACZL
• Description: Industrial Temperature Sensors Sngl Fan Contrllr
• Manufacturer: SMSC

Specifications of EMC2101-ACZL

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

SMBus Fan Control with 1°C Accurate Temperature Monitoring
Datasheet
APPLICATION NOTE: This mode is used if the host or system requires temperature data from a source other than
SMSC EMC2101
6.9
6.10
6.11
ADDR.
ADDR.
ADDR.
16h
12h
11h
0Fh
R/W
R/W
R/W
R/W
R/W
The External Diode Force Register is used to force the Fan Control Look-Up Table to a specific fan-
speed setting. When this function is enabled (see
compared against the temperature thresholds in the Fan Control Look-Up Table to determine the fan
setting to use.
The contents of this register represent temperature data in the same format as the data registers and
can be updated at any time.
The External Diode Temperature Registers are updated normally with the measured temperature and
compared against the THIGH and TCRIT limits normally but not used to determine the fan speed.
The One Shot Register initiates an update of the temperature measurements. This register can be
written at any time, however will only perform a one-shot conversion when the temperature monitoring
is in standby mode. When the one shot temperature conversion is complete the temperature data
registers are updated and the fan setting is updated if necessary. This register is self-clearing.
The Scratchpad Registers are R/W registers that perform no function. They are included for software
compatibility.
The Alert Mask Register enables interrupts from the temperature monitors and limits. Regardless of
the condition of the individual mask bits, the Status Register will be updated normally.
One Shot Register
Scratchpad Registers
Alert Mask Register
R/W
W
REGISTER
Alert Mask
REGISTER
Scratchpad
Scratchpad
the EMC2101 External Diode to be used for fan control.
REGISTER
One Shot
B7
1
B7
B7
B7
B7
Table 6.10 Scratchpad Registers
Table 6.11 Alert Mask Register
INT_
MSK
temperature data. Data is not relevant and is not stored.
Writing to this register initiates a one shot update of the
B6
Table 6.9 One Shot Register
B6
B6
B6
B6
DATASHEET
B5
1
B5
B5
B5
B5
HIGH
MSK
37
B4
B4
B4
B4
B4
LOW_
MSK
Section
B3
B3
B3
B3
B3
6.16), the contents of this register are
B2
1
B2
B2
B2
B2
TCRIT_
MSK
B1
B1
B1
B1
B1
TACH_
Revision 2.54 (06-16-09)
MSK
B0
B0
B0
B0
B0
DEFAULT
DEFAULT
DEFAULT
00h
00h
A4h
00h