AT90S2313_02 datasheet(4/92 Pages) ATMEL

Part #	AT90S2313

Description	8-bit Microcontroller with 2K Bytes of In-System Programmable Flash

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Manufacturer	ATMEL [ATMEL Corporation]

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AT90S2313

0839I–AVR–06/02

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

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

XTAL2

XTAL1

GND

C2

C1

MAX 1 HC BUFFER

HC

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