MAC7200 datasheet(142/976 Pages) FREESCALE

Part #	MAC7200

Description	MAC7200 Microcontroller Family Reference Manual

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Manufacturer	FREESCALE [Freescale Semiconductor, Inc]

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Clock Generation

MAC7200 Microcontroller Family Reference Manual, Rev. 2

Freescale Semiconductor

5.2.1.1

ALC 1:1 Mode

In this mode, the system clock is fed from the Oscillator, and the PLL is bypassed. Refer to Figure 5-4.

XCLKS = 1

PLLSEL = 0 (PLL is bypassed)

Eqn. 5-1

Eqn. 5-2

Figure 5-4. ALC 1:1 Mode Clock Path

5.2.1.2

ALC PLL Mode

In this mode, the system clock is fed from the Oscillator, and the PLL is enabled. Refer to Figure 5-5.

XCLKS = 1

PLLSEL = 1 (PLL is not bypassed)

Eqn. 5-3

Eqn. 5-4

SystemClock

OSCCLOCK

PeripheralBusClock

SystemClock

-----------------------------------

OSCCLK

-------------------------

OSC

EXTAL

OSCCLK

0 1

XTAL

PLL

PLLSEL

PLLCLK

System Clock

CRG

÷2

Peripheral

Bus Clock

SystemClock

PLLCLK

OSCCLK

SYNR

REFDV

------------------------------

PeripheralBusClock

SystemClock

-----------------------------------

PLLCLK

------------------------

MAC7200 Datasheet(PDF) 142 Page - Freescale Semiconductor, Inc

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