ML620Q503/Q504 User's Manual
Chapter 6 Clock Generation Circuit
FEUL620Q504
6–16
6.3.1.6
Low-Speed External Clock Input Mode Operation
For the low-speed external clock, the oscillation start/stop can be controlled by the frequency control register 2
(FCON2).
If it sets the XTM0 and XTM1 bits of FCON2 to "11", external clock input becomes accepted and then the
external clock input is counted to 16, then the low-speed clock (LSCLK) switches to the external clock.
In this time, the low-speed oscillation clock switch interrupt(LOSCINT) is generated.
Refer to Chapter 4 “Power Management” for the operation at each power down mode.
Figure 6-8 Low-Speed Clock Generation Circuit Operation (External Clock Mode)
V
DD
RESET
External interrupt occurred
LSCLK switch
external 16 counts
LSCLK
RC oscillation
STOP
mode
Built-in RC oscillation
LSCLK switch
RC oscillation 128counts
LOSCS bit
SYSCLK
High-speed clock
same as stop before
XTM1,0=”11”
RC oscillation 130 counts
LSCLKI
External clock
External clock
extarnal 16 counts
Built-in RC oscillation
RC oscillation 29counts
LOSCINT
Low-speed
Built-in RC oscillation
External clock
RC oscillation
External clock
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...