SC9S12XS256J1MAA FREESCALE [Freescale Semiconductor, Inc], SC9S12XS256J1MAA Datasheet - Page 48

• Manufacturer Part Number: SC9S12XS256J1MAA
• Description: HCS12 Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Device Overview S12XS Family
1.3
The clock and reset generator module (CRG) provides the internal clock signals for the core and all
peripheral modules.
Consult the S12XECRG section for details on clock generation.
The system clock can be supplied in several ways enabling a range of system operating frequencies to be
supported:
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•
•
EXTAL
SCI0 . . SCI 1
XTAL
The on-chip phase locked loop (PLL)
the PLL self clocking
the oscillator
System Clock Description
The XS family uses the XE family clock and reset generator module.
Therefore all CRG references are related to S12XECRG.
Bus Clock
RAM
CRG
Figure 1-6
Core Clock
SPI0
shows the clock connections from the CRG to all modules.
S12X
S12XS Family Reference Manual, Rev. 1.09
Figure 1-6. Clock Connections
CAN0
NOTE
Oscillator Clock
ATD0
FLASH
Freescale Semiconductor
PWM
TIM
PIM
PIT