ATMEGA161 View Datasheet(PDF) - Atmel Corporation
Part Name
Description
Manufacturer
ATMEGA161 Datasheet PDF : 134 Pages
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ATmega161(L)
Crystal Oscillator
XTAL1 and XTAL2 are input and output, respectively, of an inverting amplifier which 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
MAX 1 HC BUFFER
HC
C2
XTAL2
C1
XTAL1
GND
Note: When using the MCU Oscillator as a clock for an external device, an HC buffer should be connected as indicated in the figure.
Figure 3. External Clock Drive Configuration
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