MC9S08AC16_09 Datasheet, PDF (132/330 Pages) Freescale Semiconductor, Inc – HCS08 Microcontrollers

Internal Clock Generator (S08ICGV4)
8.2.3 External Clock Connections
If an external clock is used, then the pins are connected as shown Figure 8-4.
ICG
EXTAL
V_SS
XTAL
NOT CONNECTED
CLOCK INPUT
Figure 8-4. External Clock Connections
8.2.4 External Crystal/Resonator Connections
If an external crystal/resonator frequency reference is used, then the pins are connected as shown in
Figure 8-5. 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 8-5. External Frequency Reference Connection
8.3 Register Definition
Refer to the direct-page register summary in the Memory chapter of this data sheet for the absolute address
assignments for all ICG registers. This section refers to registers and control bits only by their names.
MC9S08AC16 Series Data Sheet, Rev. 8
132
Freescale Semiconductor