115
CHAPTER 6 CLOCK MODULATOR
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Modulation Parameter Register Contents
Table 6.3-3 Function of Each Bit of the Modulation Parameter Register (CMPR)
Bit name
Function
bit15,
bit14
Undefined
-
bit13 to
bit0
MP13 to MP0:
Modulation
Parameter bits
Depending on the PLL frequency the following modulation parameter settings are
possible. The corresponding CMPR register value is stated in the most right column.
F0:
Frequency of unmodulated input clock (PLL frequency)
T0:
Period of unmodulated input clock (PLL clock period)
resolution:
resolution of frequencies in the modulated clock. "L" (1) to "H" (7)
F
min
:
minimal frequency occurring in the frequency modulated clock
F
max
:
maximal frequency occurring in the frequency modulated clock
phase skew:
The maximal phase shift of the modulated clock relative to the unmodulated
reference clock in terms of clock periods of the unmodulated clock.
Example: phase skew=1.44
In worst case, a sequence of n periods of the modulated clock can be 1.44
×
T0
shorter or 1.44
×
T0 longer than a sequence of n periods of the unmodulated
reference clock.
n can be any number > 50 periods
phase skew 50:
phase skew for sequences with n<= 50 periods
CMPR:
register setting of the CMPR register
n periods
n periods
n periods
reference clock
mod
u
lated clock
phase skew
+
-
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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