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TDA5051AT データシート(PDF) 11 Page - NXP Semiconductors |
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TDA5051AT データシート(HTML) 11 Page - NXP Semiconductors |
11 / 29 page TDA5051A All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. 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 fosc Carrier frequency fcr Clock output frequency 1 ⁄ 2fosc 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; Rp =2.2 MΩ to 4.7 MΩ; XTAL = standard quartz crystal Table 7. Calculation of parameters depending on the clock frequency Symbol Parameter Conditions Unit fosc oscillator frequency with on-chip oscillator: frequency of the crystal quartz Hz with external clock: frequency of the signal applied at OSC1 Hz fCLKOUT clock output frequency 1 ⁄ 2fosc Hz fcr carrier frequency/digital filter tuning frequency 1 ⁄ 64fosc Hz tsu set-up time of the shaped burst 23/fcr or 1472/fosc s th hold time of the shaped burst 23/fcr or 1472/fosc s tW(DI)(min) minimum pulse width of DATA_IN signal tsu + 1/fcr s 002aaf042 TDA5051A 7 5 OSC1 DGND fosc CLK_OUT GND MICROCONTROLLER XTAL 002aaf043 TDA5051A 4 5 CLK_OUT DGND 1/2 fosc CLK_OUT GND MICROCONTROLLER 8 7 OSC2 OSC1 Rp XTAL C1 C2 |
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