 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
PIC16F887 Datasheet(PDF) 66 Page - Microchip Technology |
|
||||||||||||||||||||||||||||||
PIC16F887 Datasheet(HTML) 66 Page - Microchip Technology |
|
|
66 / 288 page  PIC16F882/883/884/886/887 41291D-page 64 Preliminary © 2007 Microchip Technology Inc. 4.4.3 LP, XT, HS MODES The LP, XT and HS modes support the use of quartz crystal resonators or ceramic resonators connected to OSC1 and OSC2 (Figure 4-3). The mode selects a low, medium or high gain setting of the internal inverter-amplifier to support various resonator types and speed. LP Oscillator mode selects the lowest gain setting of the internal inverter-amplifier. LP mode current consumption is the least of the three modes. This mode is designed to drive only 32.768 kHz tuning-fork type crystals (watch crystals). XT Oscillator mode selects the intermediate gain setting of the internal inverter-amplifier. XT mode current consumption is the medium of the three modes. This mode is best suited to drive resonators with a medium drive level specification. HS Oscillator mode selects the highest gain setting of the internal inverter-amplifier. HS mode current consumption is the highest of the three modes. This mode is best suited for resonators that require a high drive setting. Figure 4-3 and Figure 4-4 show typical circuits for quartz crystal and ceramic resonators, respectively. FIGURE 4-3: QUARTZ CRYSTAL OPERATION (LP, XT OR HS MODE) FIGURE 4-4: CERAMIC RESONATOR OPERATION (XT OR HS MODE) Note 1: A series resistor (RS) may be required for quartz crystals with low drive level. 2: The value of RF varies with the Oscillator mode selected (typically between 2 M Ω to 10 MΩ). C1 C2 Quartz RS(1) OSC1/CLKIN RF(2) Sleep To Internal Logic PIC® MCU Crystal OSC2/CLKOUT Note 1: Quartz crystal characteristics vary according to type, package and manufacturer. The user should consult the manufacturer data sheets for specifications and recommended application. 2: Always verify oscillator performance over the VDD and temperature range that is expected for the application. 3: For oscillator design assistance, reference the following Microchip Applications Notes: • AN826, “Crystal Oscillator Basics and Crystal Selection for rfPIC® and PIC® Devices” (DS00826) • AN849, “Basic PIC® Oscillator Design” (DS00849) • AN943, “Practical PIC® Oscillator Analysis and Design” (DS00943) • AN949, “Making Your Oscillator Work” (DS00949) Note 1: A series resistor (RS) may be required for ceramic resonators with low drive level. 2: The value of RF varies with the Oscillator mode selected (typically between 2 M Ω to 10 MΩ). 3: An additional parallel feedback resistor (RP) may be required for proper ceramic resonator operation. C1 C2 Ceramic RS(1) OSC1/CLKIN RF(2) Sleep To Internal Logic PIC® MCU RP(3) Resonator OSC2/CLKOUT |
Similar Part No. - PIC16F887 |
|
Similar Description - PIC16F887 |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List 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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
