EMC1002-1-ACZT-TR SMSC, EMC1002-1-ACZT-TR Datasheet - Page 16

• Manufacturer Part Number: EMC1002-1-ACZT-TR
• Description: Board Mount Temperature Sensors Dual Zone SMBus Temp Snsr
• Manufacturer: SMSC

Specifications of EMC1002-1-ACZT-TR

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

Revision 1.4 (12-18-07)
4.12
4.13
4.14
4.15
4.16
IDEALITY
FACTOR
DIODE
0.9850
0.9862
0.9875
Limit Registers
THERM Hysteresis Register
One-Shot Register
Scratchpad Registers
Ideality Factor Register
XX00 0000
XX00 0001
XX00 0010
The EMC1002 compares the limit registers to the measured temperature. The data format of the
programmed limits for this comparison is the same as the measurement data format determined by
the Configuration Register. The user is required to update the limit registers to the new format when
changing between measurement data formats.
The user can configure high and low temperature limits and an independent THERM limit. The
temperature high limit (T
register and the Temperature High Limit Low Byte register. The Temperature High Limit Low Byte
register contains the three least significant bits as shown in
The temperature low limit (T
register and the Temperature Low Limit Low Byte register as shown in
The limits are automatically compared to the temperature measurement results (T
exceeded if (T
status register and the
The THERM limit (T
limit asserts the
ALERT
The THERM hysteresis register holds a hysteresis value that impacts the de-assertion of
shown in
up. When the
temperature drops below the Temperature High Limit minus the THERM Hysteresis value.
Writing to the one-shot register while in standby mode initiates a conversion and comparison cycle.
The EMC1002 will execute a temperature measurement, compare the data to the limit registers and
return to the standby mode. A write to the one-shot register will be ignored if it occurs while the
EMC1002 is in run mode.
The scratchpad registers may be used to verify SMBus communications. These registers do not have
any affect on the operation of the device, and may be written and read via the SMBus.
The ideality factor registers are used to program the remote diode ideality factor into the EMC1002 so
that this error source can be eliminated. The default ideality factor is 1.008 and has a value of
XX010010b or 12h.
VALUE
/
THERM2
Figure 4.4 on page
M
ALERT
pin is configured as
IDEALITY
≤ T
FACTOR
DIODE
1.0054
1.0067
1.0080
ADDR
L
TH
/
THERM2
or T
) is a single byte value set by the THERM Limit register. Exceeding the THERM
ALERT
Table 4.7 Diode Ideality Factor Values
/
H
M
THERM
) is an 11-bit value that is set by the Temperature High Limit High Byte
> T
XX01 0000
XX01 0001
XX01 0010
L
12. It defaults to 10
) is an 11-bit value that is set by the Temperature Low Limit High Byte
/
pin is configured as
THERM2
VALUE
H
). If either limit is exceeded then the appropriate bit is set high in the
signal as described in
DATASHEET
THERM2
output will respond as described in
16
, then exceeding the high limit asserts this pin.
IDEALITY
FACTOR
DIODE
1.0267
1.0280
1.0294
°
C and can be set by the user at any time after power
THERM2
1°C Dual SMBus Sensor with Resistance Error Correction
XX10 0000
XX10 0001
XX10 0010
, then the output will not de-assert until the
Table 4.2 on page
Section 4.6 on page
VALUE
Table 4.2 on page
Section 4.5 on page
IDEALITY
FACTOR
DIODE
1.0489
1.0503
1.0517
11.
M
) and have been
12. When the
SMSC EMC1002
XX11 0000
XX11 0001
XX11 0010
11.
VALUE
THERM
Datasheet
11.
as