ATMEGA163 View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATMEGA163

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

Atmel Corporation 

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.

Figure 2. Oscillator Connections

External Clock

To drive the device from an external clock source, XTAL1 should be driven as shown in

Figure 3.

Figure 3. External Clock Drive Configuration

External RC Oscillator

For timing insensitive applications, the external RC configuration shown in Figure 4 can

be used. For details on how to choose R and C, see Table 64 on page 162.

Figure 4. External RC Configuration

VCC

R

NC

C

XTAL2

XTAL1

GND

Timer Oscillator

For the Timer Oscillator pins, TOSC1 and TOSC2, the crystal is connected directly

between the pins. No external capacitors are needed. The Oscillator is optimized for use

with a 32,768 Hz watch crystal. Applying an external clock source to the TOSC1 pin is

not recommended.

6 ATmega163(L)

1142E–AVR–02/03

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