MMC2114 MOTOROLA [Motorola, Inc], MMC2114 Datasheet - Page 245

• Manufacturer Part Number: MMC2114
• Description: M CORE Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

11.4 Modes of Operation
11.4.1 Normal PLL Mode
11.4.2 1:1 PLL Mode
11.4.3 External Clock Mode
11.4.4 Low-Power Options
11.4.4.1 Wait and Doze Modes
MMC2114 • MMC2113 • MMC2112 — Rev. 1.0
MOTOROLA
The clock module can be operated in normal PLL mode (default), 1:1
PLL mode, or external clock mode.
In normal PLL mode, the PLL is fully programmable. It can synthesize
frequencies ranging from 2x to 9x the reference frequency and has a
post divider capable of reducing this synthesized frequency without
disturbing the PLL. The PLL reference can be either a crystal oscillator
or an external clock.
In 1:1 PLL mode, the PLL synthesizes a frequency equal to the external
clock input reference frequency. The post divider is not active.
In external clock mode, the PLL is bypassed, and the external clock is
applied to EXTAL. The resulting operating frequency is one-half the
external clock frequency.
During wakeup from a low-power mode, the FLASH clock always clocks
through at least 16 cycles before the CPU clocks are enabled. This
allows the FLASH module time to recover from the low-power mode, and
software can immediately resume fetching instructions from the
memory.
In wait and doze modes, the system clocks to the peripherals are
enabled, and the clocks to the CPU, FLASH, and SRAM are stopped.
Each module can disable the module clocks locally at the module level.
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
Clock Module
Advance Information
Modes of Operation
Clock Module
flash
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