Settings - Fujitsu MB91460 SERIES FR60 User Manual

Chapter 48 Clock Monitor

6.Settings

6. Settings
Table 6-1 Settings for Using Clock Monitor
Settings
Set a prescaler value
Set a source clock
Change the mark level
Enable clock monitor output.(MONCLK)
*:For each setting procedure, refer to an appropriate section.
7. Q&A
7.1 How do I set an output terminal (MONCLK)?
Use the Clock Monitor Selection bits (CMCFG.CMSEL[3:0])
Operation
To set an output terminal (MONCLK)
7.2 How do I select an output frequency?
Use the Output Frequency Select bit (CMCFG.CMPRE[3:0]).
Clock Division
Ratio
1/2
1/3
1/4
1/8
1/15
1/16
7.3 How do I enable/disable clock monitor output?
Use the Output Enable bit (CMCFG.CMSEL[3:0]).
Operation
To disable clock monitor output
(To set the terminal to the Hi-z status)
Enable clock monitor output.
946
Output Frequency (Example)
CLKP=32MHz CLKP=40MHz
16.0 MHz
10.7 MHz
8.0 MHz
4.0 MHz
2.1 MHz
2.0 MHz
Setting Registers
Clock Monitor Prescaler
(CMCFG.CMPRE[3:0])
Clock Monitor Selection
(CMCFG.CMSEL[3:0])
Clock Monitor Inverter
(CSCFG.MONCKI)
Clock Monitor Selection
(CMCFG.CMSEL[3:0])
CMCFG.CMSEL[3:0]
Set to the appropriate clock (!= "0000")
20.0 MHz
13.3 MHz
10.0 MHz
5.0 MHz
2.7 MHz
2.5 MHz
Output Enable Bit (CMCFG.CMSEL[3:0])
Set to "0000".
Set to "0001"-"1111".
Setting
Procedure*
See 7.1
See 7.1
See 7.1
See 7.2
See 7.3
Frequency Prescaler
(CMCFG.CMPRE[3:0])
Set to "0001".
Set to "0010".
Set to "0011".
Set to "0111".
Set to "1110".
Set to "1111".