Philips TDA5051A Manual do Utilizador descarregar pdf (Página 11)

Product data sheet Rev. 5 — 13 January 2011 11 of 29

NXP Semiconductors

TDA5051A

Home automation modem

11. Timing

11.1 Configuration for clock

For parameter description, see Table 6.

Fig 6. External clock

For parameter description, see Table 6.

Fig 7. Typical configuration for on-chip clock circuit

Table 6. Clock oscillator parameters

Oscillator

frequency f

osc

Carrier

frequency f

Clock output frequency

⁄

osc

External components

6.080 MHz to

9.504 MHz

95 kHz to

148.5 kHz

3.040 MHz to 4.752 MHz C1 = C2 = 27 pF to 47 pF;

=2.2MΩ to 4.7 MΩ;

XTAL = standard quartz crystal

Table 7. Calculation of parameters depending on the clock frequency

Symbol Parameter Conditions Unit

osc

oscillator frequency with on-chip oscillator: frequency of

the crystal quartz

with external clock: frequency of the

signal applied at OSC1

CLKOUT

clock output frequency

⁄

osc

carrier frequency/digital filter tuning

frequency

⁄

osc

set-up time of the shaped burst 23/f

or 1472/f

osc

hold time of the shaped burst 23/f

or 1472/f

osc

W(DI)(min)

minimum pulse width of DATA_IN

signal

+ 1/f

002aaf04

TDA5051A

OSC1

DGND

osc

CLK_OUT

GND

MICROCONTROLLER

XTAL

002aaf04

TDA5051A

CLK_OUT

DGND

osc

CLK_OUT

GND

MICROCONTROLLER

OSC2

OSC1

XTAL

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 28 29

TDA5051A 1

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