MC9S12P32CFT Datasheet, PDF (221/566 Pages) Freescale Semiconductor, Inc – S12 Microcontrollers

S12 Clock, Reset and Power Management Unit (S12CPMU)
Figure 7-16. Voltage Access Select
V_BG
Ref
C
HTD
VSEL
TEMPSENSE ^ATD
Channel
Field
5
VSEL
3
HTE
2
HTDS
1
HTIE
0
HTIF
Table 7-13. CPMUHTCTL Field Descriptions
Description
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 sense can be accessed internally. See device level specification for connectivity.
0 An internal temperature proportional voltage V_HT can be accessed internally.
1 Bandgap reference voltage V_BG can be accessed internally.
High Temperature Enable Bit — This bit enables the high temperature sensor.
0 The temperature sense is disabled.
1 The temperature sense is enabled.
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.
High Temperature Interrupt Enable Bit
0 Interrupt request is disabled.
1 Interrupt will be requested whenever HTIF is set.
High Temperature Interrupt Flag — 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.
S12P-Family Reference Manual, Rev. 1.13
Freescale Semiconductor
221