ATMEGA161-8AI(2007) View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATMEGA161-8AI
(Rev.:2007)

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

Atmel Corporation 

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

C2

XTAL2

C1

XTAL1

GND

Figure 3. External Clock Drive Configuration

NC

XTAL2

EXTERNAL

OSCILLATOR

SIGNAL

XTAL1

GND

6 ATmega161(L)

1228D–AVR–02/07

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