Figure 954. Temperature Sensor Configuration Register (Ctl_Td) - STMicroelectronics SPC572L series Reference Manual

Power Management Controller digital interface (PMC_dig)
Field
TEMP_1 reset event select—high temperature sensor input 1 (150 °C).
30
REE_TD[TEMP_1] enables the reset event.
TEMP_1
0 Destructive reset.
1 Functional reset.
TEMP_0 reset event select—low temperature sensor 0 (–40 °C).
31
REE_TD[TEMP_0] enables the reset event.
TEMP_0
0 Destructive reset.
1 Functional reset.
54.3.1.20 Temperature Sensor Configuration register (CTL_TD)
The Temperature Sensor register (CTL_TD) contains two enables that must both be set in
order for the Temperature Sensor to be operable. It also includes two 4-bit signed trim
adjustment register fields that are used to modify both Temperature Sensor trim values (one
bus for over-temperature and one bus for under-temperature). Finally, this register includes
Interrupt Enables (IE) for each of the Temperature Sensor EPR bits.
TRIM_ADJ_OVER and TRIM_ADJ_UNDER are used to introduce additional hysteresis into
the Temp Sensor events.
For instance, the TRIM_ADJ_OVER bits could be written to 11111 (-7) and the Temperature
Sensor event set as an interrupt. When this interrupt triggers, the TRIM_ADJ_OVER bits
could be updated to 0111 (+7), the interrupt cleared, and the Temperature Sensor event set
as a reset.
In this way, a warning interrupt could be established before a shutdown event (at a higher
temperature).
Care must be taken to include a timeout during the clearing of the interrupt described in the
example above. The Temperature Sensor has hysteresis and a timeout may be necessary
to indicate if the interrupt flag has not cleared in a reasonable amount of time. If this is the
case, then an error should be generated.
Offset: PMC_BASE + 0x030C
0 1
R 0 0
W
Reset 0 0
16 17
R
W
Reset 0 0

Figure 954. Temperature Sensor Configuration register (CTL_TD)

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Table 915. RES_TD field descriptions(Continued)
2 3 4 5
0 0 0 0
0 0 0 0
18 19 20 21
0
TRIM_ADJ_OVER
0 0 0 0
DocID027809 Rev 4
Description
6 7 8 9
0 0 0 0
0 0 0 0
22 23 24 25
0 0
0 0 0 0
Access: User read/write
10 11 12 13
0 0 0 0
0 0 0 0
26 27 28 29
TRIM_ADJ_UNDER
0 0 0 0
RM0400
14 15
0 0
0 0
30 31
1 1