SC9257 Ver la hoja de datos (PDF) - Silan Microelectronics

Número de pieza

componentes Descripción

Fabricante

SC9257

0.3-6.0V PLL for digital tuning systems (DTS)

Silan Microelectronics 

Silan

Semiconductors

SC9257

Crystal oscillator pins (XT, XT )

As fig.2 shows, the clock necessary for internal operation is produced by connecting a crystal oscillator between

capacitors. Use the crystal oscillator selection bit to select an oscillating frequency of 3.6MHz, 4.5MHz, 7.2MHz or

10.8MHz which matches that of the crystal oscillator used.

LSB

Address D0H

MSB

OSC1 OSC2

OSC1

0

1

0

1

OSC2

0

0

1

1

OSCILLATOR

FREQUENCY

3.6MHz

4.5MHz

7.2MHz

10.8MHz

XT

C X'tal

Divider

XT

C C=30pF Typ.

Fig.2

Note: set to 3.6MHz (OSC1=”0” and OSC2=”0”) when power is turned on. The crystal is not oscillating at this time

because the system is in standby mode.

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

REV: 1.0

10

2001.10.18

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