109
CHAPTER 6 CLOCK MODULATOR
6.3.1
Clock Modulator Control Register (CMCR)
The Clock Modulator Control Register (CMCR) has the following functions:
• Set the modulator to power down mode
• Modulator enable/disable in phase or frequency modulation mode
• Indicates the status of the modulator
■
Clock Modulator Control Register (CMCR)
Figure 6.3-2 Configuration of the Clock Modulator Control Register (CMCR)
The clock modulator offers two different operation modes:
•
phase modulation
•
frequency modulation
In general frequency modulation results in better EMI behavior.
The phase modulation mode can be enabled with just one bit (PMOD). There is no additional configuration
necessary.
The remaining bits (FMODRUN, FMOD, PDX) control or indicate the status of the frequency modulation
mode. Frequency modulation mode needs some additional configuration (CMPR register).
bit 0
PDX
Po
w
er do
w
n bit
0
po
w
er do
w
n mode
1
po
w
er up mode
bit 1
FMOD
Frequency modulation enable bit
0
Frequency modulation mode disabled
1
Frequency modulation mode enabled
bit 2
FMOD
RUN
Modulator status in frequency modulation mode
0
Clock frequency unmodulated or phase modulated
1
Clock frequency modulated
bit 7
PMOD
Phase modulation enabled
0
Phase modulation disabled
1
Phase modulation enabled
R/W
:
Readable and
w
ritable
R
:
Read only
X
:
Undefined value
-
:
Undefined
:
Initial value
1
0
3
2
5
4
7
6
Initial value
0 0 0 1 X 0 0 0
B
H
0035C2
Address:
bit
CMCR
PMOD
Re-
served
Re-
served
Re-
served
-
FMOD
FMOD PDX
RUN
R/W R/W R/W R/W
R
-
R/W
R/W
bit 4 to bit 6
Reserved
bit 4
Al
w
ays
w
rite "1" to this bit
Al
w
ays
w
rite "0" to these bit
bit 5, bit 6
Reserved
Содержание MB90390 Series
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Страница 17: ...xiii APPENDIX D List of Interrupt Vectors 690 INDEX 695 ...
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Страница 132: ...104 CHAPTER 5 CLOCKS ...
Страница 152: ...124 CHAPTER 6 CLOCK MODULATOR ...
Страница 210: ...182 CHAPTER 11 TIME BASE TIMER ...
Страница 218: ...190 CHAPTER 12 WATCHDOG TIMER ...
Страница 264: ...236 CHAPTER 14 16 BIT RELOAD TIMER WITH EVENT COUNT FUNCTION ...
Страница 274: ...246 CHAPTER 15 WATCH TIMER ...
Страница 306: ...278 CHAPTER 17 DTP EXTERNAL INTERRUPTS ...
Страница 338: ...310 CHAPTER 18 8 10 BIT A D CONVERTER ...
Страница 364: ...336 CHAPTER 19 UART0 UART1 ...
Страница 398: ...370 CHAPTER 20 UART2 UART3 Figure 20 5 2 ORE Set Timing Receive data RDRF ORE ...
Страница 432: ...404 CHAPTER 20 UART2 UART3 ...
Страница 482: ...454 CHAPTER 22 SERIAL I O ...
Страница 560: ...532 CHAPTER 24 STEPPING MOTOR CONTROLLER ...
Страница 582: ...554 CHAPTER 27 ROM MIRRORING MODULE ...
Страница 632: ...604 CHAPTER 29 EXAMPLES OF SERIAL PROGRAMMING CONNECTION ...
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Страница 723: ...695 INDEX The index follows on the next page This is listed in alphabetic order ...
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