MC9S08GB60 Datasheet, PDF (119/290 Pages) Motorola, Inc – Microcontrollers

ICG Registers and Control Bits
OSCSTEN — Enable Oscillator in Off Mode
The OSCSTEN bit controls whether or not the oscillator circuit remains enabled when the ICG enters
off mode.
1 = Oscillator enabled when ICG is in off mode, CLKS = 1X and REFST = 1.
0 = Oscillator disabled when ICG is in off mode unless ENABLE is high, CLKS = 10, and
REFST = 1.
7.5.2 ICG Control Register 2 (ICGC2)
Bit 7
6
5
4
3
2
1
Bit 0
Read:
LOLRE
MFD
LOCRE
RFD
Write:
Reset: 0
0
0
0
0
0
0
0
Figure 7-14. ICG Control Register 2 (ICGC2)
LOLRE — Loss of Lock Reset Enable
The LOLRE bit determines what type of request is made by the ICG following a loss of lock indication.
The LOLRE bit only has an effect when LOLS is set.
1 = Generate a reset request on loss of lock.
0 = Generate an interrupt request on loss of lock.
MFD — Multiplication Factor
The MFD bits control the programmable multiplication factor in the FLL loop. The value specified by
the MFD bits establishes the multiplication factor (N) applied to the reference frequency. Writes to the
MFD bits will not take effect if a previous write is not complete. Select a low enough value for N such
that f_ICGDCLK does not exceed its maximum specified value.
Table 7-7. MFD Multiplication Factor Select
MFD Value
000
001
010
011
100
101
110
111
Multiplication Factor (N)
4
6
8
10
12
14
16
18
MC9S08GB/GT Data Sheet, Rev. 2.3
Freescale Semiconductor
119