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EMC1186-2-AC3-TR

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P43
Dual Channel 1°C Temperature Sensor with Hardware Thermal Shutdown and 1.8V SMBus Communications
Datasheet
Revision 1.0 (07-11-13) 28 SMSC EMC1186
DATASHEET
Bit 0 - HWSD - This bit is set when the External Diode 1 Temperature exceeds the Hardware Thermal
Shutdown Limit set by the pull-up resistors on the ALERT and SYS_SHDN pins. When set, this bit will
assert the SYS_SHDN pin.
6.3 Configuration Register 03h / 09h
The Configuration Register controls the basic operation of the device. This register is fully accessible
at either address.
Bit 7 - MASK_ALL - Masks the ALERT pin from asserting.
‘0’ - (default) - The ALERT pin is not masked. If any of the appropriate status bits are set the
ALERT pin will be asserted.
‘1’ - The ALERT pin is masked. It will not be asserted for any interrupt condition unless it is
configured in comparator mode. The Status Registers will be updated normally.
Bit 6 - RUN / STOP - Controls Active/Standby modes.
‘0’ (default) - The device is in Active mode and converting on all channels.
‘1’ - The device is in Standby mode and not converting.
Bit 5 - ALERT/COMP - Controls the operation of the ALERT pin.
‘0’ (default) - The ALERT acts as an Alert pin and has interrupt behavior as described in
Section 5.5.1.
‘1’ - The ALERT acts as a THERM pin and has comparator behavior as described in Section 5.5.2.
In this mode the MASK_ALL bit is ignored.
Bit 4 - RECD1 - Disables the Resistance Error Correction (REC) for External Diode 1.
‘0’ (default) - REC is enabled for External Diode 1.
‘1’ - REC is disabled for External Diode 1.
Bit 2 - RANGE - Configures the measurement range and data format of the temperature channels.
‘0’ (default) - The temperature measurement range is 0°C to +127.875°C and the data format is
binary.
‘1’ -The temperature measurement range is -64°C to +191.875°C and the data format is offset
binary (see Table 5.3).
Bit 1 - DAVG_DIS - Disables the dynamic averaging feature on all temperature channels.
‘0’ (default) - The dynamic averaging feature is enabled. All temperature channels will be converted
with an averaging factor that is based on the conversion rate as shown in Table 6.5.
‘1’ - The dynamic averaging feature is disabled. All temperature channels will be converted with a
maximum averaging factor of 1x (equivalent to 11-bit conversion). For higher conversion rates, this
averaging factor will be reduced as shown in Table 6.5.
Table 6.3 Configuration Register
ADDR R/W REGISTER B7 B6 B5 B4 B3 B2 B1 B0 DEFAULT
03h
R/W Configuration
MASK_
ALL
RUN/
STOP
ALERT/
COMP RECD1 - RANGE
DAVG_
DIS
00h
09h
Dual Channel 1°C Temperature Sensor with Hardware Thermal Shutdown and 1.8V SMBus Communications
Datasheet
SMSC EMC1186 29 Revision 1.0 (07-11-13)
DATASHEET
6.4 Conversion Rate Register 04h / 0Ah
The Conversion Rate Register controls how often the temperature measurement channels are updated
and compared against the limits. This register is fully accessible at either address.
Bits 3-0 - CONV[3:0] - Determines the conversion rate as shown in Ta bl e 6.5.
6.5 Limit Registers
Table 6.4 Conversion Rate Register
ADDR R/W REGISTER B7 B6 B5 B4 B3 B2 B1 B0 DEFAULT
04h
R/W
Conversion
Rate
- - - - CONV[3:0]
06h
(4/sec)
0Ah
Table 6.5 Conversion Rate
CONV[3:0]
CONVERSIONS / SECONDHEX 3 2 1 0
0h 0 0 0 0 1
1h 0 0 0 1 1
2h 0 0 1 0 1
3h 0 0 1 1 1
4h 0 1 0 0 1
5h 0 1 0 1 2
6h 0 1 1 0 4 (default)
7h 0 1 1 1 8
8h 1 0 0 0 16
9h 1 0 0 1 32
Ah 1 0 1 0 64
Bh - Fh All others 1
Table 6.6 Temperature Limit Registers
ADDR. R/W REGISTER B7 B6 B5 B4 B3 B2 B1 B0 DEFAULT
05h
R/W
Internal Diode
High Limit
128643216 8 42 1
55h
(85°C)
0Bh
Dual Channel 1°C Temperature Sensor with Hardware Thermal Shutdown and 1.8V SMBus Communications
Datasheet
Revision 1.0 (07-11-13) 30 SMSC EMC1186
DATASHEET
The device contains both high and low limits for all temperature channels. If the measured temperature
exceeds the high limit, then the corresponding status bit is set and the ALERT pin is asserted.
Likewise, if the measured temperature is less than or equal to the low limit, the corresponding status
bit is set and the
ALERT pin is asserted.
The data format for the limits must match the selected data format for the temperature so that if the
extended temperature range is used, the limits must be programmed in the extended data format.
The limit registers with multiple addresses are fully accessible at either address.
6.6 Scratchpad Registers 11h and 12h
The Scratchpad Registers are Read / Write registers that are used for place holders to be software
compatible with legacy programs. Reading from the registers will return what is written to them.
06h
R/W
Internal Diode
Low Limit
128643216 8 42 1
00h
(0°C)
0Ch
07h
R/W
External
Diode 1 High
Limit High
Byte
128643216 8 42 1
55h
(85°C)
0Dh
13h R/W
External
Diode 1 High
Limit Low
Byte
0.5 0.25 0.125 - - - - - 00h
08h
R/W
External
Diode 1 Low
Limit High
Byte
128643216 8 42 1
00h
(0°C)
0Eh
14h R/W
External
Diode 1 Low
Limit Low
Byte
0.5 0.25 0.125 - - - - - 00h
Table 6.7 Scratchpad Register
ADDR R/W REGISTER B7 B6 B5 B4 B3 B2 B1 B0 DEFAULT
11h R/W Scratchpad 7 6 5 4 3 2 1 0 00h
12h R/W Scratchpad 7 6 5 4 3 2 1 0 00h
Table 6.6 Temperature Limit Registers (continued)
ADDR. R/W REGISTER B7 B6 B5 B4 B3 B2 B1 B0 DEFAULT
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P43

EMC1186-2-AC3-TR

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Buy EMC1186-2-AC3-TR
Manufacturer:
Microchip Technology
Description:
Board Mount Temperature Sensors 1.8V SMBus Dual Temp Sensor
Lifecycle:
New from this manufacturer.
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