EMC2101-ACZT-TR SMSC, EMC2101-ACZT-TR Datasheet - Page 33

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

Specifications of EMC2101-ACZT-TR

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

SMBus Fan Control with 1°C Accurate Temperature Monitoring
Datasheet
SMSC EMC2101
6.3
6.4
ADDR
ADDR.
02h
00h
01h
10h
R/W
R
R/W
R
R
R
As shown in
temperature is stored as an 11-bit value.
Please note that the internal temperature monitor is limited to the operating temperature limits of the
part resulting in a guaranteed range of 0ºC to 85ºC.
The Status Register is a read only register and returns the operational status of the part.
If the ALERT / TACH pin is configured as an ALERT output and any of these bits are set to '1' (except
the BUSY bit and the FAULT bit), then the ALERT / TACH pin is asserted low (if interrupts are not
masked (see
Reading from the Status Register will cause the MASK bit to be set if any bit (other than BUSY and
FAULT) have been set. Each bit is automatically cleared when the error condition has been removed,
however the internal error condition flags may still be set. The ARA command must be used to clear
the ALERT / TACH pin if there are no bits set in the Status Register. In addition, reading from the
Status Register will clear all bits. If the error condition persists, then the bits will be reset at the end of
the next conversion.
When the device is configured in Comparison Mode (see
will not clear any active status bits (except EEPROM and FAULT). These bits are automatically cleared
when the error condition is removed.
Bit 7 - Busy - indicates that the ADC is converting - does not trigger an interrupt.
Bit 6 - INT_HIGH - Internal temperature has met or exceeded the high limit.
Bit 5 - EEPROM - Indicates that the EEPROM could not be found when the device powers up in the
Auto-Program Mode (see
for the EMC2101 device.
Bit 4 - EXT_HIGH - External Diode temperature has exceeded the high limit.
Temperature Data Registers
Status Register
REGISTER
Status
External Diode
External Diode
Temperature
Temperature
Temperature
REGISTER
High Byte
Low Byte
Internal
Table
Section
BUSY
B7
6.2, the internal temperature monitor is stored as an 8-bit value while the external
6.5).
Table 6.2 Temperature Data Registers
Sign
Sign
B7
0.5
HIGH
Section
INT_
B6
Table 6.3 Status Register
0.25
5.1). This bit only applies to the EMC2102-R. It will always read ‘0’
B6
64
64
EEPROM
DATASHEET
B5
0.125
33
B5
32
32
EXT_
HIGH
B4
B4
16
16
-
EXT_
LOW
B3
Section
B3
8
8
-
FAULT
B2
B2
6.23), reading the Status Register
4
4
-
TCRIT
B1
B1
2
2
-
Revision 2.54 (06-16-09)
B0
TACH
1
1
-
B0
DEFAULT
DEFAULT
00h
00h
00h
00h