MC9S08GT16A Datasheet, PDF (130/300 Pages) Freescale Semiconductor, Inc – Microcontrollers

Internal Clock Generator (S08ICGV4)
selected, this pin is not used by the ICG. The oscillator is capable of being configured to provide a higher
amplitude output for improved noise immunity. This mode of operation is selected by HGO = 1.
9.2.3 External Clock Connections
If an external clock is used, then the pins are connected as shown Figure 9-4.
ICG
EXTAL
V_SS
XTAL
NOT CONNECTED
CLOCK INPUT
Figure 9-4. External Clock Connections
9.2.4 External Crystal/Resonator Connections
If an external crystal/resonator frequency reference is used, then the pins are connected as shown in
Figure 9-5. Recommended component values are listed in the Electrical Characteristics chapter.
ICG
EXTAL
V_SS
XTAL
R_S
C₁
C₂
R_F
CRYSTAL OR RESONATOR
Figure 9-5. External Frequency Reference Connection
MC9S08GT16A/GT8A Data Sheet, Rev. 1
130
Freescale Semiconductor