sc9s08mz16 Freescale Semiconductor, Inc, sc9s08mz16 Datasheet - Page 130

• Manufacturer Part Number: sc9s08mz16
• Description: Hcs08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Internal Clock Generator (S08ICGV4)
8.4.2
8.4.3
130
Reset
Reset
DCOS
ERCS
LOCS
ICGIF
Field
Field
2
1
0
0
W
W
R
R
ICG Status Register 2 (ICGS2)
ICG Filter Registers (ICGFLTU, ICGFLTL)
Loss Of Clock Status — The LOCS bit is an indication of ICG loss of clock status.
0 ICG has not lost clock since LOCS was last cleared.
1 ICG has lost clock since LOCS was last cleared, LOCRE determines action taken.
External Reference Clock Status — The ERCS bit is an indication of whether or not the external reference clock
(ICGERCLK) meets the minimum frequency requirement.
0 External reference clock is not stable, frequency requirement is not met.
1 External reference clock is stable, frequency requirement is met.
ICG Interrupt Flag — The ICGIF read/write flag is set when an ICG interrupt request is pending. It is cleared by
a reset or by reading the ICG status register when ICGIF is set and then writing a logic 1 to ICGIF. If another ICG
interrupt occurs before the clearing sequence is complete, the sequence is reset so ICGIF would remain set after
the clear sequence was completed for the earlier interrupt. Writing a logic 0 to ICGIF has no effect.
0 No ICG interrupt request is pending.
1 An ICG interrupt request is pending.
DCO Clock Stable — The DCOS bit is set when the DCO clock (ICG2DCLK) is stable, meaning the count error
has not changed by more than n
used when exiting off state if CLKS = X1 to determine when to switch to the requested clock mode. It is also used
in self-clocked mode to determine when to start monitoring the DCO clock. This bit is cleared upon entering the
off state.
0 DCO clock is unstable.
1 DCO clock is stable.
0
0
0
0
7
7
= Unimplemented or Reserved
= Unimplemented or Reserved
Table 8-3. ICGS1 Register Field Descriptions (continued)
0
0
0
0
6
6
Figure 8-9. ICG Upper Filter Register (ICGFLTU)
Table 8-4. ICGS2 Register Field Descriptions
Figure 8-8. ICG Status Register 2 (ICGS2)
SC9S08MZ16 MCU Data Sheet, Rev. 1
0
0
0
0
5
5
unlock
for two consecutive samples and the DCO clock is not static. This bit is
0
0
0
0
4
4
Description
Description
3
0
0
3
0
0
0
0
2
2
FLT
Freescale Semiconductor
0
0
0
1
1
DCOS
0
0
0
0