
ML62Q1000 Series User's Manual
Chapter 6
Clock Generation Circuit
FEUL62Q1000
6-15
6.3 Description of Operation
6.3.1 Low-Speed Clock
For the low-speed clock generation circuit, one of the following modes can be chosen through LOSCM1 and LOSCM0
bits in the FLMOD register:
- Low-speed RC oscillation mode
- Low-speed crystal oscillation mode *
1
- External clock mode
Figure 6-2 shows the low-speed clock generation circuit configuration.
Figure 6-2 Configuration of Low-speed Clock Generation Circuit
*
1
: Available on the ML62Q1500 and ML62Q1700 group.
6.3.1.1
Configuration of Low-Speed RC Oscillation Circuit
The low-speed RC oscillation clock is chosen for the system clock at the power on.
At the power on, the low-speed clock (LSCLK) is output and the CPU runs a program after 512 counts of the low-speed
RC oscillation clock. When the STOP/STOP-D mode is released, the low-speed clock (LSCLK) is output and the CPU
runs a program after 10 counts of the low-speed RC oscillation clock.
The frequency of the low-speed RC oscillation circuit can be adjusted with the low-speed RC oscillation frequency
adjustment register (LRCADJ). To adjust the frequency, use the sample software "ML62Q1000 Series RC oscillation
adjustment sample software" provided by LAPIS.
Figure 6-3 shows the configuration of the low-speed RC oscillation circuit.
Figure 6-4 shows the operation waveforms at the start of the low-speed RC oscillation circuit and in the STOP/STOP-D
mode.
Figure 6-3 Configuration of Low-Speed RC Oscillation Circuit
Low-speed
clock
LSCLK
Low-speed clock generation circuit
FLMOD
Low-speed external
clock
Low-speed RC
oscillation circuit
Low-speed crystal
oscillation circuit
XT0*
1
XT1*
1
Low-speed clock
LSCLK
Stabilization time 512 counts
(at the power on)
Stabilization time 10 counts
(when STOP/STOP-D mode
Low-speed RC
oscillation circuit
(approx. 32.768
kHz)
Enable
oscillation
STOP/STOP-D mode signal
Signal indicating that starting is in
progress/completed
Low-speed RC oscillation
frequency adjustment register
Control circuit
Содержание ML62Q1000 Series
Страница 17: ...Chapter 1 Overview...
Страница 112: ...Chapter 2 CPU and Memory Space...
Страница 154: ...Chapter 3 Reset Function...
Страница 166: ...Chapter 4 Power Management...
Страница 196: ...Chapter 5 Interrupts...
Страница 248: ...Chapter 6 Clock generation Circuit...
Страница 274: ...Chapter 7 Low Speed Time Base Counter...
Страница 291: ...Chapter 8 16 Bit Timer...
Страница 320: ...Chapter 9 Functional Timer FTM...
Страница 382: ...Chapter 10 Watchdog Timer...
Страница 402: ...Chapter 11 Serial Communication Unit...
Страница 456: ...Chapter 12 I2 C Bus Unit...
Страница 491: ...Chapter 13 I2 C Master...
Страница 512: ...Chapter 14 DMA Controller...
Страница 531: ...Chapter 15 Buzzer...
Страница 550: ...Chapter 16 Simplified RTC...
Страница 559: ...Chapter 17 GPIO...
Страница 594: ...Chapter 18 External Interrupt Function...
Страница 612: ...Chapter 19 CRC Generator...
Страница 632: ...Chapter 20 Analog Comparator...
Страница 644: ...Chapter 21 D A Converter...
Страница 655: ...Chapter 22 Voltage Level Supervisor...
Страница 676: ...Chapter 23 Successive Approximation Type A D Converter...
Страница 709: ...Chapter 24 Regulator...
Страница 714: ...Chapter 25 Flash Memory...
Страница 743: ...Chapter 26 Code Option...
Страница 750: ...Chapter 27 LCD Driver...
Страница 788: ...Chapter 28 On Chip Debug Function...
Страница 795: ...Chapter 29 Safety Function...
Страница 813: ...Appendix A...
Страница 881: ...Revision History...