Chapter 4
Clock/ Mode/ Voltage Control
IV
- 2
Clock Control
4.1
Clock Control
The LSI has 4 types of clock oscillation circuits.
Table:4.1.1 Clock Oscillation Circuits
Figure:4.1.1 Block Diagram of Clock Control
..
After reset, the LSI operates in SLOW mode where SYSCLK is equal to SRCCLK.
..
..
To lower the LSI power consumption, the clock supply to the peripheral circuits can be con-
trolled with the PRICKCNT0/1/2 registers.
For example, if Timer 0 is not used, the clock supply to Timer 0 is stopped by setting the
PRICKCNT0.PRICKCNT00 to "0".
..
Internal high-speed oscillation circuit
Max. 10 MHz clock (HRCCLK) can be generated.
External high-speed oscillation circuit
High-speed clock is generated by connecting crystal or ceramic oscillator
to OSC1/OSC2 pins.
Internal low-speed oscillation circuit
40 kHz clock (SRCCLK) can be generated.
External low-speed oscillation circuit
Low-speed clock is generated by connecting crystal oscillator to XI/XO
pins.
M
U
X
M
U
X
HCLK
(High-speed Clock)
SYSCLK (*)
(System Clock)
HSCLK HSCLK
Divider
External
High-speed
Oscillation
HOSCCLK
Internal
High-speed
Oscillation
HRCCLK
OSC1
OSC2
External
Low-speed
Oscillation
XI
XO
Internal
Low-speed
Oscillation
SRCCLK
M
U
X
SOSCCLK
1/2
Divider
OSCSTBCLK
(Oscillation Stabilization Clock)
SCLK
(Low-speed Clock)
SCLKCNT.SCLKSEL
HCLKCNT.HCLKSEL
CPUM.CLKSEL
* CKCTR.OSCSEL2-0 control the divider ratio of SYSCLK.
SCLKCNT.SRCCNT
CPUM.XIMOD
Operation Enable
CPUM.STOP
SCLKCNT.SOSCCNT
CPUM.XIMOD
CPUM.STOP
Operation Enable
HCLKCNT.HRCCNT
CPUM.OSCMOD
Operation Enable
CPUM.STOP
HCLKCNT.HOSCCNT
CPUM.OSCMOD
CPUM.STOP
Operation Enable
Содержание MN101L Series
Страница 1: ...Cover MICROCOMPUTER MN101L MN101LR05D 04D 03D 02D LSI User s Manual Pub No 21705 015E ...
Страница 2: ......
Страница 8: ......
Страница 10: ......
Страница 11: ...Contents Contents 0 ...
Страница 22: ... Contents 11 ...
Страница 23: ...I Chapter 1 Overview 1 ...
Страница 62: ...Chapter 1 Overview I 40 Cautions for Circuit Setup ...
Страница 63: ...II Chapter 2 CPU 2 ...
Страница 94: ...Chapter 2 CPU II 32 Reset ...
Страница 95: ...III Chapter 3 Interrupts 3 ...
Страница 143: ...IV Chapter 4 Clock Mode Voltage Control 4 ...
Страница 175: ...V Chapter 5 Watchdog Timer WDT 5 ...
Страница 180: ...Chapter 5 Watchdog Timer WDT V 6 Operation ...
Страница 181: ...VI Chapter 6 Power Supply Voltage Detection 6 ...
Страница 189: ...VII Chapter 7 I O Port 7 ...
Страница 248: ...Chapter 7 I O Port VII 60 Port 8 ...
Страница 249: ...VIII Chapter 8 8 bit Timer 8 ...
Страница 282: ...Chapter 8 8 bit Timer VIII 34 8 bit Timer Cascade Connection ...
Страница 283: ...IX Chapter 9 16 bit Timer 9 ...
Страница 346: ...Chapter 9 16 bit Timer IX 64 IGBT Output with Dead Time ...
Страница 347: ...X Chapter 10 General Purpose Time Base Free Running Timer 10 ...
Страница 361: ...XI Chapter 11 RTC Time Base Timer RTC TBT 11 ...
Страница 371: ...XII Chapter 12 Real Time Clock RTC 12 ...
Страница 389: ...XIII Chapter 13 Serial Interface 13 ...
Страница 458: ...Chapter 13 Serial Interface XIII 70 IIC Communication ...
Страница 459: ...XIV Chapter 14 DMA Controller 14 ...
Страница 472: ...Chapter 14 DMA Controller XIV 14 DMA Data Transfer ...
Страница 473: ...XV Chapter 15 Buzzer 15 ...
Страница 479: ...XVI Chapter 16 A D Converter ADC 16 ...
Страница 493: ...XVII Chapter 17 LCD 17 ...
Страница 530: ...Chapter 17 LCD XVII 38 LCD Display Examples ...
Страница 531: ...XVIII Chapter 18 ReRAM 18 ...
Страница 538: ...Chapter 18 ReRAM XVIII 8 Command Library ...
Страница 539: ...XIX Chapter 19 On Board Debugger 19 ...
Страница 542: ...Chapter 19 On Board Debugger XIX 4 List of on board debugging functions ...
Страница 543: ...XX Chapter 20 Appendix 20 ...
Страница 555: ...Chapter 20 Appendix Instruction map XX 13 ...