EMC1043_07 Datasheet, PDF (21/29 Pages) SMSC Corporation – 1C Triple Temperature Sensor with Beta Compensation and Hotter of Two Zones

1°C Triple Temperature Sensor with Beta Compensation and Hotter of Two Zones
Datasheet
2
0
0
0
0
1
1
1
1
Table 4.4 Conversion Rate
CR<2:0>
1
0
0
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
CONVERSIONS / SECOND
(CONVERSION TIME)
Reserved
Reserved
Reserved
1 Conversion / sec
2 Conversions / sec
4 Conversions / sec (default)
8 Conversions / sec
16 Conversions / sec
4.5
Configuration 2 Register - (04h)
Table 4.5 Configuration 2 Register
ADDR REGISTER B7
04h
CFG2
-
B6
-
B5
-
B4
-
B3
B2
B1 B0 DEFAULT
MAX_RES DA_n COMP REC 09h
The Configuration 2 Register controls the basic functionality of the EMC1043 that is NOT compatible
with the EMC1023.
Bit 3 - MAX_RES - controls the external diode conversion time during dynamic averaging. Although
the dynamic averaging may be used to increase the ADC resolution, only 11 bits of data are available
in the temperature registers.
„ ‘0’ - the dynamic averaging will set the ADC averaging factor at 1x when the conversion rate is set
at 16 conversions per second and 2x at conversion rates lower than 16 per second.
„ ‘1’ (default) - the dynamic averaging will set the ADC averaging factor at 1x when the conversion
rate is set at 16 conversions per second, 2x at 8 conversions / second and 4x at conversion rates
lower than 8 per second.
Bit 2 - DA_n - controls the dynamic digital averaging circuitry. See Section 3.3.2.
„ ‘0’ (default) - dynamic averaging is enabled. Depending on the selected conversion rate, the ADC
averaging factor is increased for the external diodes.
„ ‘1’ - dynamic averaging is disabled. The ADC averaging factor will remain fixed at 1x for all
conversion rates and will allow increased power savings at the slower conversion rates.
Bit 1 - COMP - configures the device to perform a comparison for the Hotter of Two mode (see Section
3.3, "Operation During Run Mode," on page 12.)
„ ‘0’ (default) - the device is in normal mode
„ ‘1’ - the device is in Hotter of Two mode. In this mode, the two external diode channels are
measured and compared against each other. The hotter of the two channels has its data loaded
into the External Diode 2 Data Registers. The Internal Diode and External Diode 1 Data Registers
remain unaffected.
SMSC EMC1043
21
DATASHEET
Revision 1.37 (02-05-07)