Fujitsu MB96300 series Hardware Manual page 161

6.2.2 Clock Monitor Register (CKMR)
The Clock Monitor Register (CKMR) is used to check the current status of the System
clocks (Clock mode) and the status of the oscillation circuits.
■ Configuration of the Clock Monitor Register (CKMR)
Figure 6.2-3 shows the configuration of the Clock Monitor Register (CKMR) and Table 6.2-2 describes the
function of each bit.
Figure 6.2-3 Configuration of the Clock Monitor Register (CKMR)
15
Address:
000403
SCM
H
R
R : Read only (writing is ignored)
X : undefined value
14 13 12 11 10 9
SC2M0 SC1M1 SC1M0
PCM MCM RCM SC2M1
R R R R R R
8
Initial value
X X X X X X X X
R
bit9 bit8
SC1M1 SC1M0
0 0 CLKS1 is set to CLKRC (RC clock)
0 1 CLKS1 is set to CLKMC (Main clock)
1 0 CLKS1 is set to CLKPLL/CLKMOD (PLL clock)
1 1 CLKS1 is set to CLKSC (Sub clock)
bit11 bit10
SC2M1 SC2M0
0 0 CLKS2 is set to CLKRC (RC clock)
0 1 CLKS2 is set to CLKMC (Main clock)
1 0 CLKS2 is set to CLKPLL (unmodul. PLL clock)
1 1 CLKS2 is set to CLKSC (Sub clock)
bit12
RCM
0 RC oscillator is not ready
1 RC oscillator is ready
bit13
MCM Main Clock Monitor bit
0 Main oscillator is not ready
1 Main oscillator is ready
bit14
PCM PLL Clock Monitor bit
0 PLL not is ready
1 PLL is ready
bit15
SCM Sub Clock Monitor bit
0 Sub oscillator is not ready
1 Sub oscillator is ready
CHAPTER 6 CLOCKS
B
System Clock 1 Monitor bits
System Clock 2 Monitor bits
RC Clock Monitor bit
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