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TMP411-Q1 Datasheet(PDF) 20 Page - Texas Instruments

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Part # TMP411-Q1
Description  짹1째C Remote and Local Temperature Sensor With N-Factor and Series Resistance Correction
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TMP411-Q1 Datasheet(HTML) 20 Page - Texas Instruments

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TMP411-Q1
SBOS527F – DECEMBER 2010 – REVISED NOVEMBER 2013
www.ti.com
SOFTWARE RESET
CONSECUTIVE ALERT REGISTER
The TMP411-Q1 may be reset by writing any value to
The value in the Consecutive Alert Register (address
Pointer Register FCh. This restores the power-on-
22h) determines how many consecutive out-of-limit
reset state to all of the TMP411-Q1 registers as well
measurements
must
occur
on
a
measurement
as aborting any conversion in process and clearing
channel before the ALERT signal is activated. The
the ALERT and THERM pins.
value in this register does not affect bits in the Status
Register.
Values
of
one,
two,
three,
or
four
The TMP411-Q1 also supports reset via the two-wire
consecutive
conversions
can
be
selected;
one
general call address (00000000). The TMP411-Q1
conversion
is
the
default.
This
function
allows
acknowledges the general call address and responds
additional filtering for the ALERT pin. The consecutive
to the second byte. If the second byte is 00000110,
alert bits are shown in Table 10.
the TMP411-Q1 executes a software reset. The
TMP411-Q1 takes no action in response to other
values in the second byte.
Table 10. Consecutive Alert Register
CONSECUTIVE ALERT REGISTER (READ = 22h, WRITE = 22h, POR = 01h)
NUMBER OF CONSECUTIVE
OUT-OF-LIMIT
C2
C1
C0
MEASUREMENTS
0
0
0
1
0
0
1
2
0
1
1
3
1
1
1
4
NOTE
Bit 7 of the Consecutive Alert Register controls the enable/disable of the timeout function.
See the Timeout Function section for a description of this feature.
THERM HYSTERESIS REGISTER
The THERM Hysteresis Register, shown in Table 12, stores the hysteresis value used for the THERM pin alarm
function. This register must be programmed with a value that is less than the Local Temperature High Limit
Register value, Remote Temperature High Limit Register value, Local THERM Limit Register value, or Remote
THERM Limit Register value; otherwise, the respective temperature comparator does not trip on the measured
temperature falling edges. Allowable hysteresis values are shown in Table 11. The default hysteresis value is
10°C, whether the device is operating in the standard or extended mode setting.
Table 11. Allowable THERM Hysteresis Val
THERM HYSTERESIS VALUE
TEMPERATURE
TH[11:4]
(°C)
(HEX)
(STANDARD BINARY)
0
0000 0000
00
1
0000 0001
01
5
0000 0101
05
10
0000 1010
0A
25
0001 1001
19
50
0011 0010
32
75
0100 1011
4B
100
0110 0100
64
125
0111 1101
7D
127
0111 1111
7F
150
1001 0110
96
175
1010 1111
AF
200
1100 1000
C8
225
1110 0001
E1
20
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