mc9s12xs128 Freescale Semiconductor, Inc, mc9s12xs128 Datasheet - Page 56

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

Device Overview S12XS Family
1.9
The BDM alternate clock source is the oscillator clock.
1.10
The XCLKS is an input signal which controls whether a crystal in combination with the internal loop
controlled (low power) Pierce oscillator is used or whether full swing Pierce oscillator/external clock
circuitry is used.
The XCLKS signal selects the oscillator configuration during reset low phase while a clock quality check
is ongoing. This is the case for:
56
•
•
•
Power on reset or low-voltage reset
Clock monitor reset
Any reset while in self-clock mode or full stop mode
BDM Clock Configuration
Oscillator Configuration
S12XS Family Reference Manual, Rev. 1.10
Freescale Semiconductor