98
CHAPTER 5 CLOCKS
■
Machine Clock
The machine clock may be a PLL clock output from the PLL multiplier circuit or a clock whose frequency
is the source oscillation frequency divided by 2. This machine clock is supplied to the CPU and peripheral
functions. The main clock or PLL clock can be selected by writing to the MCS bit of the clock selection
register (CKSCR).
■
Clock Modulator
For using the clock modulator, please refer to "CHAPTER 6 CLOCK MODULATOR".
Figure 5.4-1 shows the status change diagram for machine clock selection.
Figure 5.4-1 Status Change Diagram for Machine Clock Selection
Main
MCS = 1
MCM = 1
CS1, CS0 = XX
PLL1
Main
MCS = 1
MCM = 0
CS1, CS0 = 00
B
PLL1: Multiplied
MCS = 0
MCM = 0
CS1, CS0 = 00
B
PLL2: Multiplied
MCS = 0
MCM = 0
CS1, CS0 = 01
B
PLL3: Multiplied
MCS = 0
MCM = 0
CS1, CS0 = 10
B
PLL4: Multiplied
MCS = 0
MCM = 0
CS1, CS0 = 11
B
PLL2
Main
MCS = 1
MCM = 0
CS1, CS0 = 01
B
PLL3
Main
MCS = 1
MCM = 0
CS1, CS0 = 10
B
PLL4
Main
MCS = 1
MCM = 0
CS1, CS0 = 11
B
(7)
(7)
(7)
(7)
(6)
(6)
Main
PLLx
MCS = 0
MCM = 1
CS1, CS0 = XX
B
(7)
(6)
(6)
(1)
(6)
(2)
(3)
(4)
(5)
CS2 = x
CS2 = x
CS2 = 0
CS2 = 0
CS2 = 0
CS2 = 0
CS2 = 0
CS2 = 0
CS2 = 0
CS2 = 0
PLL2A
Main
MCS = 1
MCM = 0
CS1, CS0 = 00
B
PLL2A:
MCS = 0
MCM = 0
CS1, CS0 = 00
B
PLL4A: Multiplied
MCS = 0
MCM = 0
CS1, CS0 = 01
B
PLL6: Multiplied
MCS = 0
MCM = 0
CS1, CS0 = 10
B
PLL8: Multiplied
MCS = 0
MCM = 0
CS1, CS0 = 11
B
PLL4A
Main
MCS = 1
MCM = 0
CS1, CS0 = 01
B
PLL6
Main
MCS = 1
MCM = 0
CS1, CS0 = 10
B
PLL8
Main
MCS = 1
MCM = 0
CS1, CS0 = 11
B
(7)
(7)
(7)
(7)
(6)
(6)
(6)
(6)
(8)
(9)
(10)
(11)
CS2 = 1
CS2 = 1
CS2 = 1
CS2 = 1
CS2 = 1
CS2 = 1
CS2 = 1
CS2 = 1
Multiplied
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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