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TMP451 Datasheet(PDF) 13 Page - Texas Instruments

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Part # TMP451
Description  짹1째C Remote and Local Temperature Sensor with 管-Factor and Offset Correction
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TMP451 Datasheet(HTML) 13 Page - Texas Instruments

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TMP451
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SBOS686 – JUNE 2013
Configuration Register
configuration register sets the temperature range, the ALERT/THERM modes, and controls the shutdown mode.
The configuration register is set by writing to pointer address 09h, and read by reading from pointer address 03h.
Table 5 summarizes the bits of configuration register.
Table 5. Configuration Register Bit Descriptions
CONFIGURATION REGISTER (READ = 03h, WRITE = 09h, POR = 00h)
BIT NUMBER
NAME
FUNCTION
POWER-ON RESET VALUE
0 = ALERT Enabled
7
MASK1
0
1 = ALERT Masked
0 = Run
6
SD
0
1 = Shut down
0 = ALERT
5
ALERT/THERM2
0
1 = THERM2
4:3
Reserved
0
0 = 0°C to +127°C
2
RANGE
0
1 = –64°C to +191°C
1:0
Reserved
0
MASK1 (bit 7) of the configuration register masks the ALERT output. If MASK1 is '0' (default), the ALERT output
is enabled. If MASK1 is set to '1', the ALERT output is disabled. This configuration applies only if the value of
ALERT/THERM2 (bit 5) is '0' (that is, pin 6 is configured as the ALERT output). If pin 6 is configured as the
THERM2 output, the value of the MASK1 bit has no effect.
The shutdown bit (SD, bit 6) enables or disables the temperature-measurement circuitry. If SD = '0' (default), the
TMP451 converts continuously at the rate set in the conversion rate register. When SD is set to '1', the TMP451
stops converting when the current conversion sequence is complete and enters a shutdown mode. When SD is
set to '0' again, the TMP451 resumes continuous conversions. When SD = '1', a single conversion can be started
by writing to the one-shot start register. See the One-Shot Conversion section for more information.
ALERT/THERM2 (bit 5) sets the configuration of pin 6. If the ALERT/THERM2 bit is '0' (default), then pin 6 is
configured as the ALERT output; if it is set to '1', then pin 6 is configured as the THERM2 output.
The temperature range is set by configuring RANGE (bit 2) of the configuration register. Setting this bit low
(default) configures the TMP451 for the standard measurement range (0°C to +127°C); temperature conversions
are stored in the standard binary format. Setting bit 2 high configures the TMP451 for the extended measurement
range (–64°C to +191°C); temperature conversions are stored in the extended binary format (see Table 1).
The remaining bits of the configuration register are reserved and must always be set to '0'. The power-on reset
value for this register is 00h.
Copyright © 2013, Texas Instruments Incorporated
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