ML620Q503/Q504 User's Manual
Chapter 6 Clock Generation Circuit
FEUL620Q504
6–21
6.3.2.5 High-Speed Crystal/Ceramic Oscillation Mode Operation
High speed clock is switch to crystal/ceramic oscillation mode by setting FCON0 bit of OSCM1,0 to “01”.
If the ENOSC bit of FCON1 is set to "1", the built-in RC oscillation clock is counted to 512 as the high-speed
clock, then the built-in RC oscillation clock is supplied as OSCLK. If the OSC1,0 bits of FCON0 are set to "01",
After waiting for the crystal/ceramic oscillation start time (T
XTH
) and the crystal/ceramic oscillation stabilization
time (4096 counts), the high-speed clock (OSCLK) switches from the built-in RC oscillation clock to the
crystal/ceramic oscillation clock.
In the case of low-speed crystal oscillation mode or external clock input mode, high-speed built-in oscillation
starts after the low-speed clock is counted to 26.
The high-speed clock generation circuit stops oscillation when it shifts to the STOP mode by software.
When the mode switch to STOP mode, FSTAT bit of HOSCS must be “0” and clock input from crystal/ceramic
oscillator must be stable.
By releasing the stop mode by an external interrupt, the low-speed built-in RC oscillation clock is counted to 29
and then the high-speed built-in RC oscillation clock is counted to 512, then the built-in RC oscillation clock is
supplied as OSCLK. After waiting for the crystal/ceramic oscillation start time (T
XTH
) and the crystal/ceramic
oscillation stabilization time (4096 counts), the high-speed clock (OSCLK) switches from the built-in RC
oscillation clock to the crystal/ceramic oscillation clock. Refer to Chapter 4 “Power Management” for the
operation at each power down mode.
Figure 6-13 shows the waveforms of the high-speed clock generation circuit in crystal/ceramic oscillation mode.
Содержание LAPIS SEMICONDUCTOR ML620Q503
Страница 2: ...ML620Q503 Q504 User s Manual Issue Date Apr 16 2015 FEUL620Q504 01...
Страница 18: ...Chapter 1 Overview...
Страница 32: ...Chapter 2 CPU and Memory Space...
Страница 44: ...Chapter 3 Reset Function...
Страница 50: ...Chapter 4 Power Management...
Страница 70: ...Chapter 5 Interrupts...
Страница 134: ...Chapter 6 Clock Generation Circuit...
Страница 161: ...Chapter 7 Time Base Counter...
Страница 170: ...Chapter 8 Timers...
Страница 183: ...Chapter 9 Function Timer FTM...
Страница 231: ...Chapter 10 Watchdog Timer...
Страница 239: ...Chapter 11 Synchronous Serial Port SSIO...
Страница 251: ...Chapter 12 Synchronous Serial Port with FIFO SSIOF...
Страница 283: ...Chapter 13 UART...
Страница 303: ...Chapter 14 UART with FIFO UARTF...
Страница 327: ...Chapter 15 I2 C Bus Interface...
Страница 344: ...Chapter 16 Port XT...
Страница 350: ...Chapter 17 Port 0...
Страница 361: ...Chapter 18 Port 1...
Страница 368: ...Chapter 19 Port2...
Страница 379: ...Chapter 20 Port 3...
Страница 395: ...Chapter 21 Port 4...
Страница 410: ...Chapter 22 Port 5...
Страница 426: ...Chapter 23 Melody Driver...
Страница 439: ...Chapter 24 RC Oscillation type A D Converter RC ADC...
Страница 462: ...Chapter 25 Successive Approximation Type A D Converter SA ADC...
Страница 479: ...Chapter 26 Analog Comparator...
Страница 489: ...Chapter 27 Flash Memory Control...
Страница 505: ...Chapter 28 Voltage Level Supervisor VLS...
Страница 517: ...Chapter 29 LLD circuit...
Страница 519: ...Chapter 30 On Chip Debug Function...
Страница 522: ...Appendixes...
Страница 552: ...Revision History...