121
CHAPTER 6 CLOCK MODULATOR
6.4
Application Note of the Clock Modulator
Startup/stop sequence for phase modulation mode.
Startup/stop sequence for frequency modulation mode.
Modulation parameter for frequency modulation mode.
■
Recommended Startup Sequence for Phase Modulation Mode
Note:
Do not enable the modulator before the PLL lock time has elapsed. Do not disable the PLL while the
modulator is running.
■
Recommended Startup Sequence for Frequency Modulation Mode
start
1.
Switch ON PLL
2.
Wait PLL lock time (refer to the MCM flag description in the CLOCK chapter
of the hardware manual).
3.
Enable phase modulation mode (PMOD=1).
The clock switches immediately to modulated clock
... running...
stop
4.
Disable modulator PMOD=0
5.
4 NOP cycles
6.
Disable PLL, switch to power down mode, etc.
start
1.
Switch modulator from power down to power up mode PDX=1
2.
Switch ON PLL
3.
Wait PLL lock time (refer to the MCM flag description in the CLOCK chapter
of the hardware manual). At the same time the modulator starts up.
4.
Set CMPR register to a proper setting
5.
Enable frequency modulation mode FMOD=1
After the calibration is finished, the clock switches from unmodulated to
modulated clock and the FMODRUN flag changes to "1"
... running...
stop
6.
Disable modulator FMOD=0
7.
Wait until FMODRUN changes to "0"
8.
Switch to power down mode PDX=0
9.
Disable PLL, switch to power down mode, etc.
Содержание MB90390 Series
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Страница 17: ...xiii APPENDIX D List of Interrupt Vectors 690 INDEX 695 ...
Страница 18: ...xiv ...
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 ...
Страница 722: ...694 APPENDIX ...
Страница 723: ...695 INDEX The index follows on the next page This is listed in alphabetic order ...
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