 |
Motore di ricerca datesheet componenti elettronici |
|
|
Motore di ricerca datesheet componenti elettronici |
|
L9965P Scheda tecnica(PDF) 60 Page - STMicroelectronics |
|
|
|||||||||||||||||||||||||||||
L9965P Scheda tecnica(HTML) 60 Page - STMicroelectronics |
|
|
60 / 104 page  3.9 Oscillators This section describes the device oscillators. 3.9.1 Main oscillator and aux oscillator The main oscillator operates at fMAIN_OSC and is disabled in DEEP-SLEEP state. The main oscillator has a spread spectrum feature that varies its frequency instantaneously of DMAIN_OSC, using fMAIN_OSC_MOD as the modulation frequency. It is enabled through the OSC_SS_EN bit in the INTERNAL_CFG register. The aux oscillator operates at fSTBY_OSC and is disabled in DEEP-SLEEP state. 3.9.1.1 Oscillators electrical parameters All parameters are tested and guaranteed in the following conditions, unless otherwise noted: all supplies according to the Table 3; TJ according to the Table 2. Table 33. Main oscillator electrical parameters Symbol Parameter Min Typ Max Unit fMAIN_OSC Main oscillator frequency 15.1 16 16.9 MHz fMAIN_OSC_MOD Main oscillator modulation frequency - 8 - kHz DMAIN_OSC Main oscillator frequency deviation due to spread spectrum 2 3 4 % fSTBY_OSC Aux oscillator frequency 460 500 540 kHz 3.9.2 Oscillator monitor When enabled, the main and aux oscillators are cross-checking each other for detecting frequency deviations or stuck failures. The frequency drift is detected if the deviation is higher than ΔfMON_FAIL, in this case the OSCI_FAIL flag in the INTERNAL_STATUS register is set and any pyro-fuse deployment is inhibited by the “fire inhibit” signal. If an oscillator is stuck, it is detected in tOSC_STUCK_TIMEOUT. In this case a POR signal is issued and the IC moves to OFF state and then to DEEP-SLEEP. 3.9.2.1 Diagnostics Table 34. Oscillator monitor diagnostics Fault type Assertion condition IC reaction to assertion Release condition IC reaction to flag clear Maskable Oscillator deviation If the main oscillator deviation becomes higher than ΔfMON_FAIL, the oscillator fail is acknowledged The OSCI_FAIL flag is set FAULTN line is asserted The “fire inhibit” signal is set If the main oscillator deviation is lower than ΔfMON_FAIL, the fault can be cleared by MCU FAULTN line is released Deployment is released Non-maskable This diagnostic is only active in NORMAL and DIAG Oscillator stuck If no edges are present for more than tOSC_STUCK_TIMEOUT, the POR occurs The “fire inhibit” signal is set The POR occurs Power cycle (CWUP toggle) is needed to restart again None Non-maskable This diagnostic is only active in NORMAL and DIAG L9965P Functional description DS14702 - Rev 4 page 60/104 |
|
Link URL |
| Lei ha avuto il aiuto da alldatasheet? [ DONATE ] |
Di alldatasheet | Richest di pubblicita | contatti | Privacy Policy | Collegamento alla scheda tecnica | scambio Link | Ricerca produttore 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 |
Italian ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
