 |
поискавой системы для электроныых деталей |
|
|
поискавой системы для электроныых деталей |
|
TEA5764HN датащи(PDF) 7 Page - NXP Semiconductors |
|
||||||||||||||||||||||||||||||
TEA5764HN датащи(HTML) 7 Page - NXP Semiconductors |
|
|
7 / 64 page  TEA5764HN_2 © Koninklijke Philips Electronics N.V. 2005. All rights reserved. Product data sheet Rev. 02 — 9 August 2005 7 of 64 Philips Semiconductors TEA5764HN FM radio + RDS 8.4 Crystal oscillator The crystal oscillator can operate with a 32.768 kHz clock crystal. The oscillator can be overridden via the FREFIN pin. When the FREFIN pin is used the oscillator is clocked externally by a 32.768 kHz signal. Selection between a reference clock or a reference crystal can be done via the I2C-bus. When a crystal is connected the FREFIN pin must be left open-circuit, and when pin FREFIN is used a crystal may not be connected. It is not possible to connect a crystal and apply a frequency via the FREFIN pin in the same application. The crystal oscillator generates the reference frequency for the following: • Reference frequency divider for synthesizer PLL • Timing for the IF counter • Timing for the pause detector • Free running frequency adjustment of the stereo decoder VCO • Centre frequency for adjustment of the IF filters • Clock frequency of the RDS/RBDS decoder 8.5 PLL tuning system The PLL synthesizer tuning system is suitable to operate with a 32.768 kHz reference frequency generated by the crystal oscillator or a reference clock of 32.768 kHz fed into the TEA5764HN. To tune the radio to the required frequency requires the PLL word to be calculated and then programmed to the register. The PLL word is 14 bits long; see Table 20 and Table 21. Calculation of this 14-bit word can be done as follows. Formula for high-side injection: (1) Formula for low-side injection: (2) where: NDEC = decimal value of PLL word fRF = wanted tuning frequency (Hz) fIF = intermediate frequency of 225 kHz fref = the reference frequency of 32.768 kHz Example for receiving a channel at 100.1 MHz: (3) N DEC 4f RF f IF + () × f ref -------------------------------------- = N DEC 4f RF f IF – () × f ref -------------------------------------- = N DEC 4 100.1 10 6 × 225 10 3 × + () × 32768 ------------------------------------------------------------------------ 12246.704 == |
Аналогичный номер детали - TEA5764HN |
|
Аналогичное описание - TEA5764HN |
|
|
ссылки URL |
| Конфиденциальность |
| ALLDATASHEETRU.COM |
| Вашему бизинису помогли Аллдатащит? [ DONATE ] |
Что такое Аллдатащит | реклама | контакт | Конфиденциальность | обмен ссыками | поиск по производителю All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
Russian ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
