miriac MPX-S32G274A User Manual
V2.1
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© MicroSys Electronics GmbH 2020
4.8
Temperature sensor
The S32G274A has an integrated temperature diode which is connected to a
TMP451 temperature sensor f rom Texas Instruments.
■
I²C clock f requency up to 400 kHz
■
Operating temperature -40°C to 125°C
■
Slave address according to Table 28
■
Local temperature monitoring (TMP451
’s internal temperature)
■
Remote temperature monitoring (S32G
274A’s temperature diode)
■
Two interrupts f or adjusting two temperature thresholds
Ambient: 0°C / +70°C
Ambient: -40°C / +125°C
Local Temperature
(of the sensor itself)
Max. ± 1°C
Max. ± 2°C
Remote Temperature
(of the SoC internal diode)
Max. ± 1°C
Max. ± 4°C
Figure 4-5 Temperature sensor: accuracy
The temperature sensor provides two interrupts which are connected to the GPIO
Expander:
GPIO Expander
TMP451
Pin
Signal
Pin
Signal
I/O Range
Signal
conditioning
12
THERM_ALERT#
←
6
ALERT#/THERM2
+VREF3
PU: 4k7
11
THERM_FAULT#
←
4
THERM#
+VREF3
PU: 4k7
Table 19 Temperature sensor: IRQs
