ATMEGA161-8PC View Datasheet(PDF) - Atmel Corporation

Part Name

Description

MFG CO.

ATMEGA161-8PC

8-bit Microcontroller with 16K Bytes of In-System Programmable Flash

Atmel Corporation 

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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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