AT89C5132-ROTIL datasheet(157/182 Pages) ATMEL

Part #	AT89C5132-ROTIL

Description	USB Microcontroller with 64K Bytes Flash Memory

PDF	182 Pages

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Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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157 / 182 page

157

4173E–USB–09/07

AT89C5132

23.2.4

Oscillator and Crystal

23.2.4.1

Schematic

Figure 23-4. Crystal Connection

Note:

For operation with most standard crystals, no external components are needed on X1 and X2. It

may be necessary to add external capacitors on X1 and X2 to ground in special cases (max 10

pF). X1 and X2 may not be used to drive other circuits.

23.2.4.2

Parameters

Table 105. Oscillator and Crystal Characteristics

VDD = 2.7 to 3.3V , TA = -40 to +85°C

23.2.5

Phase Lock Loop

23.2.5.1

Schematic

Figure 23-5. PLL Filter Connection

VSS

Symbol

Parameter

Min

Typ

Max

Unit

Internal Capacitance (X1 -

VSS)

Internal Capacitance (X2 -

VSS)

Equivalent Load Capacitance (X1 - X2)

Drive Level

Crystal Frequency

MHz

Crystal Series Resistance

Ω

Crystal Shunt Capacitance

VSS

FILT

VSS

AT89C5132-ROTIL Datasheet(PDF) 157 Page - ATMEL Corporation

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