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159 / 209 page  Datasheet 159 002-24601 Rev. *I 2023-02-14 TRAVEO™ T2G 32-bit Automotive MCU Based on Arm® Cortex®-M7 dual Electrical specifications Figure 26-24 WCO connection scheme[84] SID352 FLL_CJIT FLL frequency accuracy –1 – 1 % This is added to the error of the source SID353 fFLL_IN Input frequency 0.25 – 100 MHz Table 26-27 WCO Specifications Spec ID Parameter Description Min Typ Max Units Details/conditions SID360 fWCO Watch crystal frequency – 32.768 – kHz Tuning Fork Crystal with following parameters: DL (drive level) ≥ 0.5 µW, ESR ≤ 130 kΩ SID361 WCO_DC WCO duty cycle 10 – 90 % SID362 tSTART_WCO WCO start up time[83] – – 1000 ms Time from oscillator enable (BACKUP_CTL.WCO_EN <0:0>=0b1) to stable oscillation and sufficient amplitude (BACKUP_STATUS.WCO _OK<0:0>=0b1) SID363 IWCO WCO current – 1.4 – µA AGC=OFF Table 26-28 External clock input specifications Spec ID Parameter Description Min Typ Max Units Details/conditions SID366 fEXT External clock input frequency 0.25 – 100 MHz For EXT_CLK pin (all input level settings: CMOS, TTL, Automotive) SID367 EXT_DC Duty cycle 45 – 55 % Table 26-26 FLL specifications (continued) Spec ID Parameter Description Min Typ Max Units Details/conditions WCO_IN WCO_OUT MCU C1 C2 Rd VSS C3* C4* Rf VDDD VSS WCO_IN: Watch crystal oscillator input pin WCO_OUT: Watch crystal oscillator output pin C1, C2: Load Capacitors C3*, C4*: Stray Capacitance of the PCB 0R Notes 83.Oscillator startup time is a performance parameter and mainly depending on the chosen external crystal and load capacitance. 84.Refer to the family-specific Architecture TRM for more information on crystal requirements (002-25800, TRAVEO™ T2G Automotive MCU cluster 2D architecture technical reference manual). |
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