Multiple Channel 1°C Temperature Sensor with Beta Compensation
Datasheet
7.8
One Shot Register
Table 7.9 One Shot Register
B6 B5 B4 B3
ADDR.
0Fh
R/W
REGISTER
B7
B2
B1
B0
DEFAULT
Writing to this register initiates a single conversion cycle. Data
is not stored and always reads 00h
W
One Shot
00h
The One Shot Register is used to initiate a one shot command. Writing to the one shot register when
the device is in standby mode and BUSY bit (in Status Register) is ‘0’, will immediately cause the ADC
to update all temperature measurements. Writing to the One Shot Register while the device is in active
mode will have no effect.
7.9
Therm Limit Registers
Table 7.10 Therm Limit Registers
ADDR.
R/W
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
DEFAULT
External
Diode Therm
Limit
55h
(85°C)
19h
R/W
128
64
32
16
8
4
2
1
Internal Diode
Therm Limit
55h
(85°C)
20h
21h
R/W
R/W
128
128
64
64
32
32
16
16
8
8
4
4
2
2
1
1
Therm
Hysteresis
0Ah
(10°C)
The Therm Limit Registers are used to determine whether a critical thermal event has occurred. If the
measured temperature exceeds the Therm Limit, the THERM pin is asserted. The limit setting must
match the chosen data format of the temperature reading registers.
Unlike the ALERT pin, the THERM pin cannot be masked. Additionally, the THERM pin will be released
once the temperature drops below the corresponding threshold minus the Therm Hysteresis.
7.10
Channel Mask Register
Table 7.11 Channel Mask Register
ADDR.
R/W
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
DEFAULT
Channel
Mask
E
INT
MASK
1Fh
R/W
-
-
-
-
-
-
00h
MASK
The Channel Mask Register controls individual channel masking. When a channel is masked, the
ALERT pin will not be asserted when the masked channel reads a diode fault or out of limit error. The
channel mask does not mask the THERM pin.
Bit 1 - EMASK - Masks the ALERT pin from asserting when the External Diode channel is out of limit
or reports a diode fault.
‘0’ (default) - The External Diode channel will cause the ALERT pin to be asserted if it is out of
limit or reports a diode fault.
SMSC EMC1412
Revision 1.41 (02-23-12)
DATA3S1HEET
SMSC [ SMSC CORPORATION ]
