MC9S12E Motorola, MC9S12E Datasheet - Page 91

• Manufacturer Part Number: MC9S12E
• Description: MC9S12E-Family Device User Guide V01.04
• Manufacturer: Motorola

Section 3 System Clock Description
The Clock and Reset Generator provides the internal clock signals for the core and all peripheral modules.
Figure 3-1 shows the clock connections from the CRG to all modules. Consult the CRG Block Guide for
details on clock generation.
EXTAL
XTAL
PE7 = XCLKS
OSC
Table 3-1Clock Selection Based on PE7
Freescale Semiconductor, Inc.
1
0
For More Information On This Product,
CRG
Figure 3-1 Clock Connections
Colpitts Oscillator selected
Pierce Oscillator/external clock selected
Go to: www.freescale.com
Bus Clock
Oscillator Clock
Description
Device User Guide — 9S12E128DGV1/D V01.04
Core Clock
TIM0, TIM1, TIM2
SCI0, SCI1, SCI2
HCS12 CORE
MEBI
BDM
INT
VREG
Flash
PWM
ATD
DAC
PMF
RAM
PIM
SPI
IIC
MMC
DBG
CPU
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