Chapter 7 S12 Clock, Reset and Power Management Unit (S12CPMU_UHV_V5)
S12ZVHY/S12ZVHL Family Reference Manual, Rev. 1.05
260
Freescale
Semiconductor
NOTE
The voltage at the temperature sensor can be computed as follows:
V
HT
(temp) = V
HT(150)
- (150 - temp) * dV
HT
Figure 7-18. Voltage Access Select
Table 7-17. CPMUHTCTL Field Descriptions
Field
Description
5
VSEL
Voltage Access Select
Bit
— If set, the bandgap reference voltage V
BG
can be accessed internally (i.e.
multiplexed to an internal Analog to Digital Converter channel). If not set, the die temperature proportional
voltage V
HT
of the temperature sensor can be accessed internally.
See device level specification for connectivity.
For any of these access the HTE bit must be set.
0 An internal temperature proportional voltage V
HT
can be accessed internally.
1 Bandgap reference voltage V
BG
can be accessed internally.
3
HTE
High Temperature Sensor/Bandgap Voltage Enable Bit
— This bit enables the high temperature sensor and
bandgap voltage amplifier.
0 The temperature sensor and bandgap voltage amplifier is disabled.
1 The temperature sensor and bandgap voltage amplifier is enabled.
2
HTDS
High Temperature Detect Status Bit
— This read-only status bit reflects the temperature status.
Writes have
no effect.
0 Junction Temperature is below level T
HTID
or RPM.
1 Junction Temperature is above level T
HTIA
and FPM.
1
HTIE
High Temperature Interrupt Enable Bit
0 Interrupt request is disabled.
1 Interrupt will be requested whenever HTIF is set.
0
HTIF
High Temperature Interrupt Flag
— HTIF is set to 1 when HTDS status bit changes.
This flag can only be
cleared by writing a 1.
Writing a 0 has no effect. If enabled (HTIE=1), HTIF causes an interrupt request.
0 No change in HTDS bit.
1 HTDS bit has changed.
C
HTD
V
BG
ADC
Ref
Channel
VSEL
TEMPSENSE
