MC9S08QE16CLC Datasheet, PDF (171/350 Pages) Freescale Semiconductor, Inc – Low-power wireless applications, Gas, water and heater meters

Internal Clock Generator (S08ICGV4)
ICG
EXTAL
V_SS
XTAL
R_S
C₁
C₂
R_F
CRYSTAL OR RESONATOR
Figure 10-5. External Frequency Reference Connection
10.3 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.
10.3.1 ICG Control Register 1 (ICGC1)
7
6
5
4
3
2
1
0
R
HGO¹
W
RANGE
REFS
CLKS
0
OSCSTEN
LOCD
Reset
0
1
0
0
0
1
0
0
= Unimplemented or Reserved
Figure 10-6. ICG Control Register 1 (ICGC1)
1 _{This bit can be written only once after reset. Additional writes are ignored.}
MC9S08AC60 Series Data Sheet, Rev. 3
Freescale Semiconductor
171