mc9s12xf512 Freescale Semiconductor, Inc, mc9s12xf512 Datasheet - Page 111

• Manufacturer Part Number: mc9s12xf512
• Description: S12x Microcontrollers 16-bit Automotive Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

S12XECRG performs a quality check on the incoming clock signal. As soon as clock quality check
indicates a valid Oscillator Clock signal the reset sequence starts using the Oscillator clock. If after 50
check windows the clock quality check indicated a non-valid Oscillator Clock the reset sequence starts
using Self-Clock Mode.
Figure 2-22
and when the RESET pin is held low.
2.6
The interrupts/reset vectors requested by the S12XECRG are listed in
specification for related vector addresses and priorities.
Freescale Semiconductor
Interrupts
and
Figure 2-23
Internal RESET
RESET
Internal POR
RESET
Internal POR
Internal RESET
Figure 2-22. RESET Pin Tied to V
Interrupt Source
Real time interrupt
LOCK interrupt
SCM interrupt
show the power-up sequence for cases when the RESET pin is tied to V
Figure 2-23. RESET Pin Held Low Externally
MC9S12XF - Family Reference Manual, Rev.1.19
Table 2-18. S12XECRG Interrupt Vectors
Mask
Clock Quality Check
(no Self-Clock Mode)
Clock Quality Check
(no Self Clock Mode)
CCR
I bit
I bit
I bit
128 SYSCLK
) (
) (
) (
128 SYSCLK
) (
) (
) (
64 SYSCLK
DD
64 SYSCLK
Chapter 2 S12XE Clocks and Reset Generator (S12XECRG)
(by a Pull-up Resistor)
CRGINT (LOCKIE)
CRGINT (SCMIE)
CRGINT (RTIE)
Local Enable
Table
2-18. Refer to MCU
DD
111