mc9s12xf512 Freescale Semiconductor, Inc, mc9s12xf512 Datasheet - Page 195

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

from the EXTAL input frequency. In full stop mode (PSTP = 0), the EXTAL pin is pulled down by an
internal resistor of typical 200 kΩ.
Freescale Semiconductor
Figure 5-2. Loop Controlled Pierce Oscillator Connections (LCP mode selected)
Freescale recommends an evaluation of the application board and chosen
resonator or crystal by the resonator or crystal supplier.
Loop controlled circuit is not suited for overtone resonators and crystals.
Full swing Pierce circuit is not suited for overtone resonators and crystals
without a careful component selection.
Figure 5-3. Full Swing Pierce Oscillator Connections (FSP mode selected)
Figure 5-4. External Clock Connections (FSP mode selected)
* R
MCU
Refer to manufacturer’s data.
s
EXTAL
can be zero (shorted) when use with higher frequency crystals.
XTAL
MC9S12XF - Family Reference Manual, Rev.1.19
MCU
MCU
EXTAL
EXTAL
XTAL
XTAL
RS*
RB
Not Connected
NOTE
NOTE
Ceramic Resonator
Crystal or
CMOS Compatible
External Oscillator
Ceramic Resonator
(V
C1
C2
DDPLL
Crystal or
C1
C2
Level)
V
SSPLL
Chapter 5 Pierce Oscillator (S12OSCLCPV2)
V
SSPLL
195