mc9s12xs128 Freescale Semiconductor, Inc, mc9s12xs128 Datasheet - Page 51

• Manufacturer Part Number: mc9s12xs128
• Description: Hcs12 Microcontrollers 16-bit Automotive Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

1.4.2.5
Although this is not a low-power mode, unused peripheral modules should not be enabled in order to save
power.
1.4.3
The timer module, pulse width modulator, analog-to-digital converters, and the periodic interrupt timer
provide a software programmable option to freeze the module status when the background debug module
is active. This is useful when debugging application software. For detailed description of the behavior of
the ATD, TIM, PWM, and PIT when the background debug module is active consult the corresponding
section.
1.5
The MCU security mechanism prevents unauthorized access to the Flash memory. For a detailed
description of the security features refer to the S12XS9SEC section.
1.6
Consult the CPU12/CPU12X Reference Manual and the S12XINT section for information on exception
processing.
1.6.1
Resets are explained in detail in the Clock Reset Generator (S12XECRG) section.
1.6.2
Table 1-10
(S12XINT) provides an interrupt vector base register (IVBR) to relocate the vectors. Associated with each
Freescale Semiconductor
Vector Address
Security
Resets and Interrupts
lists all interrupt sources and vectors in the default order of priority. The interrupt module
Freeze Mode
Resets
Vectors
$FFFC
Run Mode
$FFFE
$FFFE
$FFFE
$FFFE
$FFFA
When referring to the S12XINT section please be aware that the XS family
neither features an XGATE nor an MPU module.
Table 1-9. Reset Sources and Vector Locations
S12XS Family Reference Manual, Rev. 1.10
Low Voltage Reset (LVR)
Power-On Reset (POR)
Illegal Address Reset
COP watchdog reset
External pin RESET
Clock monitor reset
Reset Source
NOTE
Mask
None
None
None
None
None
None
CCR
PLLCTL (CME, SCME)
COP rate select
Local Enable
Device Overview S12XS Family
None
None
None
None
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