 |
поискавой системы для электроныых деталей |
|
|
поискавой системы для электроныых деталей |
|
ST72321B датащи(PDF) 24 Page - STMicroelectronics |
|
|
|||||||||||||||||||||||||||||
ST72321B датащи(HTML) 24 Page - STMicroelectronics |
|
|
24 / 187 page  24/187 6 SUPPLY, RESET AND CLOCK MANAGEMENT The device includes a range of utility features for securing the application in critical situations (for example in case of a power brown-out), and re- ducing the number of external components. An overview is shown in Figure 12. For more details, refer to dedicated parametric section. Main features ■ Optional PLL for multiplying the frequency by 2 (not to be used with internal RC oscillator) ■ Reset Sequence Manager (RSM) ■ Multi-Oscillator Clock Management (MO) – 5 Crystal/Ceramic resonator oscillators – 1 Internal RC oscillator ■ System Integrity Management (SI) – Main supply Low voltage detection (LVD) – Auxiliary Voltage detector (AVD) with interrupt capability for monitoring the main supply or the EVD pin 6.1 PHASE LOCKED LOOP If the clock frequency input to the PLL is in the range 2 to 4 MHz, the PLL can be used to multiply the frequency by two to obtain an fOSC2 of 4 to 8 MHz. The PLL is enabled by option byte. If the PLL is disabled, then fOSC2 = fOSC/2. Caution: The PLL is not recommended for appli- cations where timing accuracy is required. See “PLL Characteristics” on page 150. Figure 11. PLL Block Diagram Figure 12. Clock, Reset and Supply Block Diagram 0 1 PLL OPTION BIT PLL x 2 fOSC2 / 2 fOSC LOW VOLTAGE DETECTOR (LVD) fOSC2 AUXILIARY VOLTAGE DETECTOR (AVD) MULTI- OSCILLATOR (MO) OSC1 RESET VSS EVD VDD RESET SEQUENCE MANAGER (RSM) OSC2 MAIN CLOCK AVD Interrupt Request CONTROLLER PLL SYSTEM INTEGRITY MANAGEMENT WATCHDOG SICSR TIMER (WDG) WITH REALTIME CLOCK (MCC/RTC) AVD AVD AVD LVD RF IE WDG RF 0 1 fOSC (option) 0 S F fCPU 00 |
|
ссылки URL |
| Вашему бизинису помогли Аллдатащит? [ DONATE ] |
Что такое Аллдатащит | реклама | контакт | Конфиденциальность | Ссылка на техническое описание | 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
