
ML62Q1000 Series User's Manual
Chapter 2 CPU and Memory Space
FEUL62Q1000
2-4
Wait Mode and No-wait Mode
2.2.1
ML62Q1000 series has two CPU operation modes: wait mode and no-wait mode.
The mode can be chosen by Code Option. The maximum CPU operating frequency differs between the wait mode and
no-wait mode depending on PLL reference frequency chosen by the Code Option. Table 2-4 shows maximum operating
frequency of high-speed clock, peripheral circuit and CPU. See Chapter 26 "Code Option" for details on how to set the
Code Option.
Table 2-4 Maximum Operating Frequency of High-Speed Clock, Peripheral Circuit and CPU
PLL reference
frequency
Maximum operating frequency
of peripheral circuit
Maximum operating frequency of CPU
Wait mode
No-wait mode
24MHz
24MHz
24MHz
6MHz
16MHz
16MHz
16MHz
8MHz
Ÿ
Wait mode
In this mode, instruction codes read from the program memory are stored into the built-in buffer. The CPU can work
at high speed to read the instructions from the buffer.
In contiguous address instruction processing, the instructions can be executed without a wait time for storing them in
the buffer. In branch instruction processing, the number of execution cycles increases due to a wait time for storing
the instructions in the buffer.
The maximum operating frequency of the CPU in the wait mode is 24 MHz.
Ÿ
No-wait mode
This mode allows the CPU to directly execute instruction codes read from the program memory without involving the
buffer. This mode minimizes the number of instruction execution cycles.
The maximum operating frequency of the CPU in the no-wait mode is 8 MHz.
See Appendix C "Instruction execution cycle" for the number of instruction execution cycles in wait and no-wait modes.
The CPU operation mode (wait mode or no-wait mode) can be chosen by the Code Option is applied even when the
low-speed clock (LSCLK) is used for the system clock.
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...