 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
STM32F072CB Datasheet(PDF) 69 Page - STMicroelectronics |
|
|
|||||||||||||||||||||||||||||
STM32F072CB Datasheet(HTML) 69 Page - STMicroelectronics |
|
|
69 / 128 page  DS9826 Rev 6 69/128 STM32F072x8 STM32F072xB Electrical characteristics 99 Figure 17. Typical application with an 8 MHz crystal 1. REXT value depends on the crystal characteristics. Low-speed external clock generated from a crystal resonator The low-speed external (LSE) clock can be supplied with a 32.768 kHz crystal resonator oscillator. All the information given in this paragraph are based on design simulation results obtained with typical external components specified in Table 40. In the application, the resonator and the load capacitors have to be placed as close as possible to the oscillator pins in order to minimize output distortion and startup stabilization time. Refer to the crystal resonator manufacturer for more details on the resonator characteristics (frequency, package, accuracy). MS19876V1 (1) OSC_IN OSC_OUT RF Bias controlled gain fHSE REXT 8 MHz resonator Resonator with integrated capacitors CL1 CL2 Table 40. LSE oscillator characteristics (fLSE = 32.768 kHz) Symbol Parameter Conditions(1) Min(2) Typ Max(2) Unit IDD LSE current consumption low drive capability - 0.5 0.9 µA medium-low drive capability - - 1 medium-high drive capability - - 1.3 high drive capability - - 1.6 gm Oscillator transconductance low drive capability 5 - - µA/V medium-low drive capability 8 - - medium-high drive capability 15 - - high drive capability 25 - - tSU(LSE)(3) Startup time VDDIOx is stabilized - 2 - s 1. Refer to the note and caution paragraphs below the table, and to the application note AN2867 “Oscillator design guide for ST microcontrollers”. 2. Guaranteed by design, not tested in production. 3. tSU(LSE) is the startup time measured from the moment it is enabled (by software) to a stabilized 32.768 kHz oscillation is reached. This value is measured for a standard crystal and it can vary significantly with the crystal manufacturer |
|
Link URL |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link to Datasheet | 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
