AN663 Просмотр технического описания (PDF) - Silicon Laboratories

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AN663

PRECISION32 MCU FAMILY CLOCKING OPTIONS

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AN663

2.4. External Oscillator (EXTOSCn)

The AHB clock may be derived from the external oscillator module. The external oscillator supports four different

external oscillators: crystal, CMOS, RC, and C.

Figure 4 depicts a block diagram for the external oscillator module.

External RC

Oscillator

VIO

External C

Oscillator

XTAL2

XTAL2

EXTOSCn Module

External Crystal

XTAL1

10 M

XTAL2

External CMOS

Oscillator

XTAL2

XTAL1

XTAL2

External Oscillator

Control

EXTOSCn Clock

Figure 4. External Oscillator Block Diagram

Rev. 0.1

5

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