Rainbow-electronics ATmega161L Manuel d'utilisateur télécharger pdf (Page 6)

ATmega161(L)

1228C–AVR–08/02

Crystal Oscillator XTAL1 and XTAL2 are input and output, respectively, of an inverting amplifier that can

be configured for use as an on-chip Oscillator, as shown in Figure 2. Either a quartz

crystal or a ceramic resonator may be used. To drive the device from an external clock

source, XTAL2 should be left unconnected while XTAL1 is driven as shown in Figure 3.

Figure 2. Oscillator Connections

Figure 3. External Clock Drive Configuration

XTAL2

XTAL1

GND

XTAL2

XTAL1

GND

EXTERNAL

OSCILLATOR

SIGNAL

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Rainbow-electronics ATmega161L Manuel d'utilisateur Page 6